• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method for determining the low temperature properties of a paraffinic fuel, the fuel is passed from a storage chamber through a sieve-mounted measuring cell, the measuring cell is cooled by means of a cooling device, the temperature of the fuel in the measuring cell is measured, and a fluid pressure representing the flow resistance occurring at the sieve is measured measured and the temperature occurring at a defined setpoint of the liquid pressure determined and output as a result of the method, wherein for the pressure measurement a defined sample amount of the fuel is jerkily conveyed from the storage chamber to obtain a pressure pulse.
    公开号:AT517729A1
    申请号:T636/2015
    申请日:2015-09-29
    公开日:2017-04-15
    发明作者:Glanznig Gerd；Lutz Josef
    申请人:Grabner Instr Messtechnik Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for determining the low-temperature properties of a paraffin-containing fuel in which the fuel from a storage chamber is passed through a sieve-equipped measuring cell, the measuring cell is cooled by means of a cooling device, the temperature of the fuel located in the measuring cell and a measured The fluid pressure occurring on the screen is measured and the temperature occurring at a defined set point of the fluid pressure is determined and output as a result of the method.
    The invention further relates to a device for carrying out such a method.
    A method and a device of the aforementioned type are described in DD 120714. The method is used in particular to determine the filterability limit of a paraffin-containing fuel.
    At low temperatures, mineral oil middle distillates have the property of exhibiting poor flow behavior and precipitating solid paraffin. For example, if a diesel fuel having a cloud point of 0 ° C is kept below 0 ° C for an extended period of time, e.g. during a winter cold period, the paraffin crystallizes in tabular crystals that gelatinize the fuel and prevent its passage through narrow conduits and filters.
    The temperature of the filterability limit above which liquid mineral oil products can still be used without interference is therefore a suitable quality criterion for the usability of these substances in cold climates or in winter operation. It is known to carry out the determination of the temperature of the filterability limit by pressing a cooled sample of the fuel through a metal mesh of standardized mesh size into a collecting container at regular temperature intervals (ASTM D6371). After passing the specified amount, the sample returns to the cooling cell under the influence of gravity. The temperature of the filterability limit is considered reached when the flow time in the filtration cycle exceeds a certain value (for example 60 sec).
    In another embodiment of the filterability test recommended particularly for European and additive-containing diesel fuels (cold filter plugging point test / CFPP test), the limit temperature is determined in a series of regularly repeated suction and ventilation strokes, in which a continuously cooled fuel sample is injected directly in the cold room attached test sieve just stopped happening. While processes with suction and aeration cycles work discontinuously, DD 120714 has proposed a continuous process in which the cooling or measuring cell equipped with a metal mesh is designed as a flow cell and continuously flows in only one direction through the fuel to be tested becomes. The flow resistance that the metal screen has for the product flow is determined by the pressure at the inlet of the measuring cell. The measuring cell is equipped with Peltier cooling batteries mounted on its side surfaces, whose cooling capacity is regulated as a function of the pressure value. The regulation takes place in such a way that the preselected pressure, which corresponds to the temperature of the filterability limit of the investigated fuel, is established by precipitating a certain amount of wax crystals on the metal screen. The sample temperature determined by a sensor is the desired filterability limit.
    A disadvantage of the method described in DD 120714 is that exact measurement results can only be achieved if, during commissioning of the test device, a predetermined volume flow of the sample is set and this is kept the same throughout the process. The reason for this is that changes in the flow rate distort the results of the pressure measurement. Another disadvantage of the method according to DD 120714 is that a constant flow of the sample liquid is needed, so that a large volume of the sample is consumed.
    The invention therefore aims to improve a method and a device of the type mentioned in that the defined flow rate can be easily adjusted and kept the same and the consumed sample volume can be reduced.
    To solve this problem, the invention provides in a method of the type mentioned above, that for each pressure measurement a defined sample amount of the fuel is jerkily conveyed from the storage chamber to obtain a pressure pulse. The fact that a pressure pulse is used to measure the fluid pressure, a constant flow rate of the fuel is not required, so that the volume of the fuel required for the process can be reduced. The desired flow rate results here from a control of the respective ejected amount of fuel and the time over which the ejection takes place. With a short-term emission of a small amount of fuel, the adjustment and control of the flow rate can be technically much easier to implement than with a constant fuel delivery.
    In this case, the procedure is preferably such that the measurement of the liquid pressure is repeated during the cooling of the measuring cell at a number of different temperatures of the fuel in order to obtain a series of measured values, wherein for each measurement a defined, identical sample quantity of the fuel is jerkily conveyed out of the storage chamber, to get a pressure pulse. The fact that the pressure measurement during the cooling of the fuel is not continuous, but a series of measurements is made at intervals measured pressure readings, a constant flow rate of the fuel is not required, so that the volume of the fuel required for the process can be reduced. Compliance with the required flow rate is done in a simple manner in that for each measurement a defined, same sample amount of the fuel is jerkily conveyed from the storage chamber to obtain a pressure pulse. Preferably, the emission of a defined amount of fuel is achieved in each case by a delivery piston of a delivery device being displaced by a defined path by means of a drive device, in particular a stepping motor.
    Alternatively, the defined amount of fuel can also be conveyed by means of a micropump.
    The short-term discharge of the defined sample amount of the fuel causes a pressure pulse downstream of the conveyor or upstream of the screen disposed in the measuring cell due to the compressibility of the fuel. The pressure pulse is detected by the pressure measuring device, wherein the preferred procedure is such that the maximum of the fluid pressure occurring during a pressure pulse is used in each case as a measured value of the fluid pressure.
    The flow resistance occurring at the screen can basically be represented by various pressure measurements. For example, a differential pressure of pressure values measured in front of and behind the screen can be used as the fluid pressure representing the flow resistance. In a simple manner, however, the procedure is preferably such that the liquid pressure prevailing upstream of the measuring cell is used as the liquid pressure representing the flow resistance occurring on the sieve.
    The parameter to be determined by the method according to the invention, which characterizes the low-temperature property of the fuel, in particular the filterability limit or the CFPP, is basically determined such that initially a calibration takes place in which a fuel with a known temperature value of the parameter, in particular the filterability limit, the liquid pressure is determined, which at the known temperature value of the
    Parameters of this fuel is measured. This pressure reading is then set for the test equipment concerned with respect to that parameter as a defined set point of fluid pressure. The calibration can be replaced with a non-linear correlation between the filterability limit and the liquid pressure by a correlation that takes into account the nonlinear relationship. As soon as the defined setpoint value of the liquid pressure is reached when carrying out the test with a fuel with an unknown parameter of the low-temperature property, the current temperature of the fuel in the measuring cell is determined and determined as the desired temperature value of the parameter, e.g. the filterability limit output.
    With regard to the fact that in the context of the method according to the invention no continuous pressure measuring signal but a measured value series of discrete pressure measured values is obtained, the desired parameter, such as e.g. the temperature of the
    Filterability limit then considered to be determined when the current fluid pressure reading exceeds the setpoint for the first time.
    However, according to a preferred procedure, an increase in accuracy is achieved if a characteristic curve of the fluid pressure as a function of the temperature is created from the measured value series and the temperature associated with the defined desired value of the fluid pressure in the characteristic curve is determined and output as a result of the method.
    The method according to the invention is suitable not only for determining the filterability limit or the cold filter plugging point (CFPP) of the fuel, but also for determining the pour point of the fuel. The pour point of the fuel is the temperature at which it just flows when cooled. For the definition of the flow characteristic, the standards (DIN, ASTM) specify different test methods.
    With the method according to the invention, both the filterability limit and the pour point can be determined in a single process run. It is preferably provided for this purpose that a first desired value of the liquid pressure is predetermined, which is determinant for the filterability limit and that a second desired value of the liquid pressure is predetermined, which is decisive for the pour point. As soon as the measured value series has been obtained in a process run, the filterability limit can be determined in the context of the evaluation of the measured value series or the characteristic curve generated from the measured value series on the basis of the first setpoint value and the pour point based on the second setpoint value.
    The method can be carried out so that the temperature of the fuel in the measuring cell is gradually reduced, in particular in steps of 1 ° C, and that after each cooling step, a measurement of the liquid pressure takes place.
    Alternatively, the temperature of the fuel located in the measuring cell can be continuously reduced and, in each case, a measurement of the fluid pressure can take place when passing through defined temperature stages. The continuous reduction of the temperature is in this case preferred because the process is completed faster.
    Due to the design of the measuring cell as a flow cell, the cloud point and / or the freeze point of the fuel can be determined in addition to the filterability limit and / or the pour point. This is preferably done in the measuring cell by means of an optical measuring method. The optical measuring method preferably comprises a transmitted light measurement.
    The cloud point is also a cold property of diesel fuel and fuel oil and denotes the temperature (° C) at which a bright, liquid product under defined test conditions by the formation of paraffin crystals is cloudy or cloudy.
    If both the filterability limit and / or the pour point and the cloud point are to be determined in a single process run, it is preferred that the respective fuel in the measuring cell is cooled and during a first cooling step the cloud point and during a second cooling step Filterability limit and / or the pour point is determined.
    In addition, the freeze point of the fuel can be determined in a simple manner. The freeze point defines the melting interval together with the cloud point. In this case, the procedure is preferably such that the fuel in the measuring cell is reheated after cooling and the freeze point is determined during the heating.
    According to a further aspect of the invention, the object on which the invention is based is solved by a device for carrying out the method according to the invention, comprising a storage chamber for the fuel to be tested, a supply line connected to the storage chamber, designed as a flow cell and provided with a sieve, a conveying device for conveying fuel from the storage chamber through the measuring cell, a cooling device for cooling the measuring cell, a temperature sensor for measuring the temperature of the fuel in the measuring cell, a pressure sensor for measuring a fluid pressure which occurs on the screen, and a control unit which the measured values of the temperature sensor and the pressure sensor are supplied, wherein the conveying device is designed for abruptly conveying a defined sample amount of the fuel from the storage chamber in order to increase a pressure pulse old.
    The control unit can be designed, for example, as a microcontroller.
    The pressure pulse is preferably generated in that the conveying device comprises a piston bounding the storage chamber, which can be actuated by means of a drive device. In particular, it is provided that the drive device comprises a stepper motor. Alternatively, the conveyor may include a micropump or other actuators, such as e.g. Piezo actuators include.
    It is preferably provided that the pressure sensor is arranged to measure the fluid pressure prevailing upstream of the measuring cell. In a structurally particularly advantageous manner, the pressure sensor is integrated in the piston of the conveying device.
    It is preferably provided that the control unit interacts with the cooling device and the conveying device in order to control these in dependence on the measured values of the temperature sensor and the pressure sensor, and in that the control unit is set up to measure the liquid pressure during cooling of the measuring cell in a number of different ways Repeat temperatures of the fuel, wherein a series of measurements is obtained, and for each measurement to promote a defined, same sample amount of the fuel jerky from the storage chamber.
    In order to be able to process the measured value pairs of the measured value series, it is preferably provided that the control unit comprises an evaluation circuit to which the measured values of the pressure sensor and the temperature sensor are fed and which possibly has stored the measured value series, wherein the evaluation circuit displays the values occurring at a defined desired value of the liquid pressure Temperature determined and outputs as a result of the process.
    Preferably, the maximum of the fluid pressure occurring in a pressure pulse in the evaluation circuit is used in each case as a measured value of the fluid pressure.
    Advantageously, the evaluation circuit is set up to create a characteristic of the fluid pressure as a function of the temperature from the measured value series and to determine the temperature associated with the defined set value of the fluid pressure in the characteristic curve and output it as a result of the method.
    The control unit can cooperate with the cooling device for the stepwise reduction of the temperature of the fuel in the measuring cell, in particular in steps of 1 ° C., wherein a measurement of the fluid pressure takes place after each cooling stage.
    Alternatively, it is preferably provided that the control unit cooperates with the cooling device for the continuous reduction of the temperature of the fuel located in the measuring cell and that in each case a measurement of the liquid pressure takes place when passing through defined temperature levels.
    A further preferred embodiment provides that the measuring cell is associated with an optical measuring device for measuring the cloud point (cloud point) and / or the freeze point of the fuel. In particular, the optical measuring device operates according to the transmitted light method and preferably comprises a light source arranged on one side of the measuring cell and a light sensor arranged on the opposite side of the measuring cell.
    For cooling the measuring cell, a cooling device with adjustable cooling power is preferably used. Preferably, the cooling device comprises at least one Peltier element. The measuring cell can be provided with Peltier elements either on one side or on two sides.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. 1 shows a device according to the invention for determining the cloud point and the filterability limit of a paraffin-containing fuel.
    In Fig. 1, 1 denotes a storage chamber for the fuel to be tested, in which a sample 2 of the fuel is received. The storage chamber 1 is formed in a hollow cylinder 3, which is closed on one side by an axially displaceable piston 4. The piston 4 has a piston rod 5 which cooperates with a displacement drive, not shown, for the piston 4. The displacement drive can be formed for example by a stepper motor. On the side opposite the piston 4, the storage chamber 1 is closed by a valve block 8, in which the inflow line 9 and the outflow line 10 are formed. The inflow line 9 has a valve 11 and the outflow line has a valve 12.
    When the valve is open, the drain line 10 connects the storage chamber 1 with the measuring cell 13, which is designed as a flow cell and provided with a sieve 14. As soon as the piston 4 delivers a defined sample quantity of the fuel jerkily out of the storage chamber 1, the sample quantity passes via the line 10 into the measuring cell 13. The sample flows through the measuring cell 13 and thus leaves it at the side opposite the feed line via the outlet 15 the pressure value which is produced on the screen 14 is determined by a pressure sensor, which in the present case is integrated in the piston 4.
    Alternatively, however, a pressure sensor is also conceivable which is arranged in the supply line 10 or at another point located upstream of the measuring cell 13.
    For cooling the measuring cell 13, a cooling device is provided, wherein the measuring cell 13 together with the cold side of the cooling device is thermally insulated, as indicated schematically at 16.
    Furthermore, it can be seen in FIG. 1 that the measuring cell 13 in each case has a glass window 17 on two opposite sides. The thermal insulation 16 also has corresponding glass windows or suitable optical feedthroughs 17, wherein all optical elements 17 are aligned with each other. On one side of the measuring cell 13 is a light source 18, e.g. a laser, and on the opposite side, a photodetector 19 is arranged, in such a way that the light emitted from the light source 18, the light through the glass window 17 and the measuring cell 13 and can be detected by the photodetector 19. By such a transmitted light method, the cloud point of the sample can be determined.
    Furthermore, a control unit 20 is provided, to which the measured values of a temperature sensor detecting the sample temperature within the measuring cell 13 and of the pressure sensor are supplied and which controls the cooling capacity of the cooling device. By way of example, the cooling device for the measuring cell 13 comprises a cooling stage which is in contact with the measuring cell 13 and has a Peltier element 22. On the warm side of the Peltier element 22, a copper plate 21 may be arranged, which is equipped with a heat sink. In the copper plate bores or channels may be formed, through which a cooling liquid can be passed.
    权利要求:
    Claims (27)
    [1]
    claims:
    A method for determining the low temperature properties of a paraffinic fuel, wherein the fuel from a storage chamber is passed through a sieve-equipped measuring cell, the measuring cell is cooled by means of a cooling device, measured the temperature of the fuel located in the measuring cell and on the sieve occurring fluid pressure is measured and the temperature occurring at a defined setpoint of the fluid pressure is determined and output as a result of the method, characterized in that for the pressure measurement a defined sample amount of the fuel is jerkily conveyed from the storage chamber to obtain a pressure pulse.
    [2]
    2. The method according to claim 1, characterized in that the measurement of the liquid pressure during the cooling of the measuring cell is repeated at a number of different temperatures of the fuel to obtain a series of measurements, wherein for each measurement a defined, same sample amount of the fuel jerky from the Reservoir is promoted to receive a pressure pulse.
    [3]
    3. The method according to claim 1 or 2, characterized in that the maximum of the fluid pressure occurring at a pressure pulse is used in each case as a measured value of the fluid pressure.
    [4]
    4. The method of claim 1, 2 or 3, characterized in that the liquid pressure prevailing upstream of the measuring cell is used as the liquid pressure representing the flow resistance occurring at the screen.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that from the measured value series, a characteristic curve of the fluid pressure in dependence on the temperature is created and determined in the characteristic of the defined setpoint of the fluid pressure temperature is determined and output as a result of the method.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the filterability limit (CFPP) of the fuel and / or the pour point of the fuel is output as a result of the method.
    [7]
    7. The method according to claim 6, characterized in that a first desired value of the liquid pressure is predetermined, which is determinative of the Filtrierbarkeitsgrenze and that a second desired value of the liquid pressure is predetermined, which is decisive for the pour point.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the temperature of the fuel in the measuring cell is gradually reduced, in particular in steps of 1 ° C, and that after each cooling step, a measurement of the liquid pressure.
    [9]
    9. The method according to any one of claims 1 to 7, characterized in that the temperature of the fuel located in the measuring cell is continuously reduced and that in each case a measurement of the liquid pressure takes place when passing through defined temperature levels.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that the cloud point (cloud point) and / or the freeze point of the fuel is determined in the measuring cell by means of an optical measuring method.
    [11]
    11. The method according to claim 10, characterized in that the optical measuring method comprises a transmitted light measurement.
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the respectively located in the measuring cell fuel is cooled and during a first cooling step, the cloud point and during a second cooling step, the filterability limit and / or the pour point is determined.
    [13]
    13. The method according to claim 12, characterized in that the respective fuel located in the measuring cell is reheated after cooling and is determined during the heating of the freeze point.
    [14]
    14. A device for carrying out a method according to one of claims 1 to 13, comprising a storage chamber for the fuel to be tested, standing with the pantry in line connection, designed as a flow cell and provided with a sieve measuring cell, a conveyor for conveying fuel from the Storage chamber through the measuring cell, a cooling device for cooling the measuring cell, a temperature sensor for measuring the temperature of the fuel in the measuring cell, »a pressure sensor for measuring a fluid resistance occurring on the screen and a control unit that measures the temperature sensor and the pressure sensor are supplied, wherein the conveying device for the impact-like conveying a defined sample amount of the fuel from the storage chamber is formed to obtain a pressure pulse.
    [15]
    15. The apparatus according to claim 14, characterized in that the conveying device comprises a reservoir bounding the piston, which is actuated by means of a drive device.
    [16]
    16. The apparatus according to claim 15, characterized in that the drive device comprises a stepper motor.
    [17]
    17. The apparatus according to claim 14, characterized in that the conveying device comprises a micropump or a piezo pump.
    [18]
    18. Device according to one of claims 14 to 17, characterized in that the pressure sensor for measuring the fluid pressure prevailing upstream of the measuring cell is arranged.
    [19]
    19. The device according to claim 18, characterized in that the pressure sensor is integrated in the piston of the conveying device.
    [20]
    20. Device according to one of claims 14 to 119, characterized in that the control unit cooperates with the cooling device and the conveying device to> control these in dependence on the measured values of the temperature sensor and the pressure sensor, and that the control unit is arranged to the measurement to repeat the liquid pressure during the cooling of the measuring cell at a number of different temperatures of the fuel, wherein a series of measurements is obtained, and to promote a defined, equal sample amount of the fuel jerkily from the storage chamber for each measurement.
    [21]
    21. Device according to one of claims 14 to 20, characterized in that the control unit comprises an evaluation circuit, which are supplied to the measured values of the pressure sensor and the temperature sensor and optionally has stored the measured value series, wherein the evaluation circuit at a defined setpoint of the fluid pressure occurring temperature and outputs as a result of the process.
    [22]
    22. The device according to claim 21, characterized in that the maximum of the fluid pressure occurring in a pressure pulse in the evaluation circuit is used in each case as a measured value of the fluid pressure.
    [23]
    23. The apparatus of claim 21 or 22, characterized in that the evaluation circuit is adapted to create from the series of measurements a characteristic of the liquid pressure in dependence on the temperature and to determine the characteristic of the defined setpoint of the liquid pressure associated temperature and as a result of the procedure.
    [24]
    24. Device according to one of claims 14 to 23, characterized in that the control unit cooperates with the cooling device for the stepwise reduction of the temperature of the fuel located in the measuring cell, in particular in steps of 1 ° C, and that after each cooling step, a measurement of the liquid pressure he follows.
    [25]
    25. The device according to one of claims 14 to 23, characterized in that the control unit cooperates with the cooling device for continuously reducing the temperature of the fuel located in the measuring cell and that in each case a measurement of the liquid pressure takes place when passing through defined temperature levels.
    [26]
    26. Device according to one of claims 14 to 25, characterized in that the measuring cell is associated with an optical measuring device for measuring the cloud point (cloud point) and / or the freeze point of the fuel.
    [27]
    27. The device according to claim 26, characterized in that the optical measuring device operates according to the transmitted light method and preferably comprises a light source arranged on one side of the measuring cell and a light sensor arranged on the opposite side of the measuring cell.
    类似技术:
    公开号 | 公开日 | 专利标题
    DE3921841C2|1992-05-07|
    EP2806271B1|2017-04-26|Method and measuring device for determining physical gas properties
    DE102005035045B9|2007-11-08|Measuring device for the determination of flow rates of electrically conductive liquids, measuring element and method
    DE102010027942A1|2011-10-20|Measuring device and measuring method for an injection molding machine for determining a batch-specific characteristic number
    DE102008051364B4|2012-03-15|rotary evaporator
    EP3663001A1|2020-06-10|Pipette device with throttle position in the pipette channel
    AT517729B1|2017-06-15|Method and apparatus for determining low temperature properties
    EP2910921A1|2015-08-26|Method for adjusting temperature and tempering container
    DE102014210545A1|2015-12-17|Method for calibrating flow meters for fluid media
    DE102005032324A1|2007-01-11|Continuous temperature control system for injection or pressure die casting tools has mixing and throttle valves connected to cooling and heating feed lines and temperature sensor and flow meter linked to control unit in return line
    DE2443735A1|1975-08-07|METHOD AND DEVICE FOR THE CONTINUOUS AUTOMATIC ANALYSIS OF THE FILTERABILITY POINT OF LIQUIDS, IN PARTICULAR OF GAS OILS
    DE102006053078A1|2008-05-15|Apparatus and method for the continuous transfer and analysis of fluids
    DE102016201537A1|2017-08-03|rheometer
    DE2334255B1|1974-10-17|Method and device for continuous monitoring of a liquid for the presence of a small amount of an impurity with a lower boiling point
    DE1267444B|1968-05-02|Method and device for testing the thermal behavior of a liquid and application of the method and / or device for testing the corrosion of materials
    DE2634474A1|1977-09-08|PROCESS FOR CONTINUOUS AUTOMATIC MEASUREMENT OF THE FILTRABILITY THRESHOLD TEMPERATURE OF A LIQUID AND DEVICE FOR PERFORMING THE PROCESS
    EP3508338A1|2019-07-10|Pressing device for the recovery of biopolymer- containing products while avoiding denaturation from a pressed material
    DE102010000755B4|2018-12-13|Arrangement for measuring the viscosity of a uniformly tempered liquid
    DE102013018281A1|2015-04-30|Volumetric dosing unit
    DE19831946B4|2004-05-27|Method and device for determining the filterability of liquids
    EP2846087B1|2021-06-02|Method for operating a steam boiler and device for carrying out the method
    DE19831947B4|2004-01-15|Methods and devices for determining the filterability of liquids
    DE19707084A1|1998-08-27|System for controlled filling of small open=topped container with liquid
    DE102005020258B4|2008-06-12|Device for injection rate and / or injection mass determination
    DE10344611B4|2006-08-17|Method for measuring the supersaturation of solutions of solids in liquids and sensor system for use in the aforementioned method
    同族专利:
    公开号 | 公开日
    US10837950B2|2020-11-17|
    US20180267009A1|2018-09-20|
    EP3356787A1|2018-08-08|
    AT517729B1|2017-06-15|
    WO2017054019A1|2017-04-06|
    EP3356787B1|2020-03-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3213668A|1962-02-14|1965-10-26|Socony Mobil Oil Co Inc|Freezing point monitor|
    US3872710A|1972-02-28|1975-03-25|Erap|Apparatus for measuring the index of filterability of a liquid|
    US4023397A|1973-09-19|1977-05-17|Societe Anonyme Dite: Antar Petroles De L'atlantique|Method and apparatus for the continuous automatic analysis of the filterability point of liquids, particularly doped diesel oil|
    DE2701276A1|1976-01-15|1977-07-21|Elf Aquitaine|METHOD AND DEVICE FOR MEASURING AND RECORDING THE FLOW PROPERTIES OF A LIQUID|
    DE2634474A1|1976-03-04|1977-09-08|Antar Petroles Atlantique|PROCESS FOR CONTINUOUS AUTOMATIC MEASUREMENT OF THE FILTRABILITY THRESHOLD TEMPERATURE OF A LIQUID AND DEVICE FOR PERFORMING THE PROCESS|
    US5046355A|1988-09-08|1991-09-10|Exxon Chemical Patents Inc.|Process for assessing cold start performance of a wax containing fuel|
    US20110083994A1|2009-10-13|2011-04-14|Sirota Eric B|Onset haze measurement apparatus and procedure|
    WO2015041672A1|2013-09-20|2015-03-26|Schlumberger Canada Limited|Microfluidic determination of wax appearance temperature|
    US3122911A|1961-09-25|1964-03-03|Refrigerated |
    US4292837A|1979-02-02|1981-10-06|Stanhope-Seta Limited|Liquid testing apparatus|
    BR9501855A|1995-04-28|1997-08-26|Petroleo Brasileiro Sa|Process and apparatus for determining the temperature of onset of crystals in paraffinic oils|
    JPH10274616A|1997-03-28|1998-10-13|Cosmo Sogo Kenkyusho:Kk|Method and apparatus for testing practical low-temperature fluidity of a fuel oil|
    US20030173205A1|2002-03-12|2003-09-18|Arne Karlsson|Process vessel with integral evaporator|
    US8268629B2|2005-06-21|2012-09-18|dTEC Systems L.L.C.|Method for the measurement of water and water-soluble components in non-aqueous liquids|
    US20090283068A1|2008-05-15|2009-11-19|William L Willison|Fuel filter assembly with pressure sending unit|
    US8721744B2|2010-07-06|2014-05-13|Basf Se|Copolymer with high chemical homogeneity and use thereof for improving the cold flow properties of fuel oils|
    US20120192480A1|2011-01-31|2012-08-02|Barrett Douglas P|Automated fuel polishing system and methods|
    AT515081B1|2014-02-20|2015-06-15|Anton Paar Provetec Gmbh|Method for setting the temperature and temperature control tank|
    WO2016083130A1|2014-11-27|2016-06-02|Basf Se|Copolymer and use thereof for reducing crystallization of paraffin crystals in fuels|
    KR101704248B1|2015-08-25|2017-02-07|현대자동차주식회사|Device and method for controlling heater of fuel filter|
    EA202091413A1|2018-07-11|2020-09-24|Бейкер Хьюз Холдингз Ллк|WELL ASPHALTEN INHIBITORS BASED ON IONIC LIQUID AND METHODS OF THEIR APPLICATION|DE102019209688A1|2019-07-02|2021-01-07|Robert Bosch Gmbh|Method for determining a physical parameter of fuel|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA636/2015A|AT517729B1|2015-09-29|2015-09-29|Method and apparatus for determining low temperature properties|ATA636/2015A| AT517729B1|2015-09-29|2015-09-29|Method and apparatus for determining low temperature properties|
    PCT/AT2016/000084| WO2017054019A1|2015-09-29|2016-09-22|Method and device for determining low temperature properties|
    EP16778182.2A| EP3356787B1|2015-09-29|2016-09-22|Method and device for determining low temperature properties|
    US15/761,142| US10837950B2|2015-09-29|2016-09-22|Method and device for determining low temperature properties|
    [返回顶部]