• 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:
    Method and apparatus for determining the saturation temperature of a solution. In an optical measurement vessel, the temperature of a sample of the solution is gradually decreased until crystals are formed and subsequently gradually increased until the crystals dissolve. The temperature is measured continuously and the formation and dissolving of the crystals is detected optically by means of a beam of polarised light which is transmitted through the measuring vessel, and passed through an analyzer the direction of polarisation of which is normal to that of the beam of light, and detected by a photodetector behind the analysator. Only when a small amount of optically active crystals is present in the solution, in which the direction of polarisation of the light is rotated, the photodetector measures a certain light intensity. The moment the last crystals, upon heating, dissolve is detected by the drop of the measured light intensity to a minimum value. The temperature of the solution at that moment is the saturation temperature of the solution. …<??>Preferably the beam of polarized light is generated by means of a laser. For monitoring the transmitted beam, a beam splitter is preferably mounted in front of the analyzer, which casts part of the transmitted light onto a second photodetector.
    公开号:SU1364248A3
    申请号:SU833625383
    申请日:1983-07-26
    公开日:1987-12-30
    发明作者:Йоханнес Бирманс Андреас；Христиан Буркс Хенк；Герардус Хубертус Рамакерс Карел
    申请人:Уни Ван-Кунстместфабрикен Б.В. (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to optical measurements, and specifically to methods for determining the saturation temperature of a solution.
    The purpose of the invention is to increase the accuracy and reliability of determining the saturation temperature of the solution.
    1 shows a block diagram of a device for implementing the method; FIG. 2 shows idealized diagrams of changes in the temperature and brightness of light during a measuring cycle.
    The device contains a light-proof cabinet 1 in which the optical part of the device is placed. Through the supply line 4, the test solution can be fed to the optical measuring vessel 2. Measuring vessel 2 is equipped with a heating and cooling jacket 3, fed by line 6 and emptied by line 7, along which cooling and heating fluid follows. by using a programmable thermostat 8, the temperature of this liquid can alternately decrease and increase, so that the solution in the measuring vessel 2 is alternately cooled to a temperature below the saturation temperature and heated to those perature higher than the saturation temperature. The solution in measuring vessel 2 is continuously stirred by means of a magnetic reamer 9.
    The laser 10 deflects the beam of linearly polarized light 11 through the measuring vessel 2. On the path traversed by the passing light, a divided rectangular prism 14 is placed, the separation plane 15 of the name device 19, the sensitive part of which is placed as close as possible to the light beam in vessel 2.
    The output signals from the photodetectors 13 and 17 and the temperature measuring device 19 are powered by a multipoint recording meter 18.
    Q Figure 2 shows the plot of change variables measured during the measuring cycle in idealized form. Time t is laid out horizontally, the light bone p15 L measured by a photodetector 13 (bottom curve 21), temperature T measured by a temperature measuring device 19 (center curve 22), and the brightness of the light,
    20 measured by photodetector 17 (upper curve 23).
    The measurement cycle includes the following operations,
    The measuring vessel 2 is fed
    25 clean solution. The polarization filter I prevents the passage of laser light, so that the brightness of the light, which is measured by the photodetector 13, has a low, virtually constant level, the brightness of the light, which is measured by the photodetector 17, is high.
    Now the temperature of the solutions gradually decreases, and at a temperature of 35
    Round T, the solute begins to crystallize. In the case presented here, the solution became supercooled, so that T and is not a semi-transparent mirror surface / s and is at an angle of 45 k
    passing beam.
    This is the true saturation temperature 40 ni. This is due to the fact that since the number of crystals is small, the light, the polarization plane of which turned in the crystals, passes through the polarization filter 12, p- This prism is the deflection of the light, the measured photodetection part 16 of the transmitted radiation to the photodetector 17., leaving a part of the passing beam falls on the polarization 1B) 1st filter 12, the polarization direction of which is normal to the direction of the polarized light beam 11, which is generated by the laser 10, if there is light that can pass this polarization This filter 12, then it falls on the photodetector 13.
    The temperature of the solution in measuring vessel 2 is measured by means of an electrical temperature measuring device 19, the sensitive part of which is placed as close as possible to the light beam in vessel 2.
    The output signals from the photodetectors 13 and 17 and the temperature measuring device 19 are powered by a multipoint recording meter 18.
    Figure 2 shows the plot of change variables measured during the measuring cycle in idealized form. Time t is laid out horizontally; light brightness L, measured by photo detector 13 (bottom curve 21), temperature T measured by a temperature measuring device 19 (center curve 22), and light brightness,
    measured by photo detector 17 (top 23).
    The measurement cycle includes the following operations,
    The measuring vessel 2 is fed
    clean solution. The polarization filter I prevents the passage of laser light, so that the brightness of the light, which is measured by the photodetector 13, has a low, virtually constant level, the brightness of the light, which is measured by the photodetector 17, is high.
    Now the temperature of the solutions gradually decreases, and at a temperature
    Round T, the solute begins to crystallize. In the case presented here, the solution became supercooled, so that T was not 0
    five
    rum 13, quickly increases to a peak value, and then decreases to a small level, since the light is strongly split in a dense crystalline mass; the brightness of the light measured by the detector 17 is reduced to a low level.
    Following this, the temperature of the solution gradually rises until the crystals re-dissolve. When the crystalline mass is mostly dissolved, but the crystals are still present, the brightness of the light measured by the photodetector 13 (curve 21),
    increases to the next peak value and thereafter decreases when the crystals dissolve again to a low constant level. The temperature Tg at which the last crystals dissolve is the temperature of the crystal to be measured. After the crystals dissolve, the brightness of the light measured by the photodetector 17 again reaches its high level.
    This determination can be carried out both indiscriminately and intermittently. For an intermittent determination, the vessel 2 is filled with a test solution and then closed, after which the determination is carried out in the manner described. After this, the sample is drained, the vessel 2, if necessary, is washed and the new sample is either fed or not fed. In a continuous determination, a small test stream is continuously supplied, and the temperature of the solution alternately decreases until crystals form and rises until crystals dissolve; A sample submitted per unit of time is taken in such an amount that it does not interfere with the specified temperature program.
    For real determination of the temperature of the saturation, only the signals T and the photodetector 13 are used. However, the signal of the photodetector 17 gives a good indication of the reliability of the measurement, the deviation of this signal may, for example, mark defects or equipment clogging, or indicate the presence of insoluble suspended particles. This signal can be used to control the temperature program of the thermostat 8. In Fig. 1, this possibility is indicated by a dotted line. The software device 20 controls the thermostat 8 so that the temperature from
    Yu
    15 0 5 0
    five
    five
    0
    Measuring vessel 2 decreased when the signal of photodetector 17 (curve 23) reached a high level, and increased when this signal was at a low level.
    权利要求:
    Claims (2)
    [1]
    1. A method for determining the solution temperature is an optically anisotropic substance in which the temperature of the solution is increased from the temperature at which the solution contains solute crystals to the temperature at which all solute crystals dissolve, while continuously measuring the temperature of the solution pass a beam of light through the solution and determine the temperature according to the intensity of the transmitted light, which corresponds to the moment of dissolution of the last crystals, characterized in that, in order to increase Initially, starting with a solution that does not contain crystals, the temperature gradually increases (the temperature of the solution is lowered until crystals form, a linearly polarized light beam passes through the solution, the light beam passing through the solution passes through the analyzer, the polarization direction of which is normal to the polar direction light the beam, and determine the desired temperature at the moment when the intensity of the light passing through the solution reaches its minimum and constant value.
    [2]
    2. Method POP1, characterized in that, in order to increase the reliability of the determination, a part of the beam is diverted from the light beam passing through the solution in front of the analyzer and its intensity is measured, while the moment of formation of crystals is judged by the beginning of the decrease in the intensity of the allotted part ray.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1364248A3|1987-12-30|Method of determining temperature of saturation of optically anisotropic substance solution
    US3623356A|1971-11-30|Dew point hygrometer
    JPS5759107A|1982-04-09|Method and device for measuring plate thickness
    US5135306A|1992-08-04|Particle measuring method and apparatus
    US6620622B1|2003-09-16|Method of polarimetry and method of urinalysis using the same
    US2668470A|1954-02-09|Method and apparatus for electroptical analysis of the crystalline content of liquids
    US3901603A|1975-08-26|Polarimeter and polarimetric method
    US2966091A|1960-12-27|Industrial refractometers
    JPH05254983A|1993-10-05|Method and apparatus for melt level detection
    CN208520494U|2019-02-19|A kind of solution saturation temperature self-operated measuring unit
    JPH05111602A|1993-05-07|Crystallizer and crystallizing method
    Hosoya et al.1978|Apparatus designed for in-situ observations of growth of crystals from aqueous solutions under well-controlled temperature conditions
    US3350978A|1967-11-07|Optical rotation measuring instrument
    CN108489629A|2018-09-04|A kind of solution saturation temperature self-operated measuring unit and measurement method
    RU2284529C2|2006-09-27|Photon echo-based magneto-optical current detector
    JP6757964B2|2020-09-23|Crystallization analyzer and crystallization analysis method
    DK147438B|1984-08-06|METHOD OF DIGEL-FREE ZONE MELIGATION OF A VERTICALLY ORIENTED SEMICONDUCTOR TO MANAGE THE DIAMETER
    SU672549A1|1979-07-05|Method of measuring circular dichroism in crystals
    JPH0621854B2|1994-03-23|Sedimentation velocity measuring device
    SU940093A1|1982-06-30|Biofield magnetic component measuring device
    RU1119402C|1996-02-20|Method of measuring increment of optically anisotropic crystals in crystallizer
    SU518621A1|1976-06-25|Photoelectric magnetic risk
    SU787908A1|1980-12-15|Method of measuring phosphorescence of biological objects in refrigerator with relay-system controlled thermic regulation
    SU932288A1|1982-05-30|Device for thermometer graduation and checking
    Khanchich1987|Polarization-optical methods of investigating structure-formation kinetics in polymer systems
    同族专利:
    公开号 | 公开日
    JPS59107248A|1984-06-21|
    EP0102106A1|1984-03-07|
    IN157046B|1986-01-04|
    AT30474T|1987-11-15|
    DE3374220D1|1987-12-03|
    CA1208033A|1986-07-22|
    US4572676A|1986-02-25|
    KR870001228B1|1987-06-22|
    NL8203013A|1984-02-16|
    KR840005556A|1984-11-14|
    EP0102106B1|1987-10-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2716371A|1950-05-22|1955-08-30|Gen Electric Co Ltd|Apparatus for measuring the saturation temperature of solutions|
    US3026710A|1956-10-01|1962-03-27|Phillips Petroleum Co|Ammonium nitrate analysis and control|
    US3008324A|1957-09-25|1961-11-14|Standard Oil Co|Low temperature cloud point apparatus|
    US3060318A|1960-11-28|1962-10-23|Antar Petroles Atlantique|Method and apparatus for the testing of fluids|
    NL287768A|1962-02-05|
    US3283644A|1962-11-27|1966-11-08|Du Pont|Apparatus for determining the concentration of dispersed particulate solids in liquids|
    US3354317A|1964-08-17|1967-11-21|Exxon Research Engineering Co|Radiation sensitive apparatus and method for analyzing molecular weight distribution in polymeric material|
    FR1417250A|1964-09-28|1965-11-12|Cie De Raffinage Shell Berre|Method and apparatus for measuring the cloud point of liquids|
    US3545254A|1968-02-13|1970-12-08|Shell Oil Co|Cloud point detector|
    US3540826A|1968-06-06|1970-11-17|Eg & G Inc|Saturation hygrometer|
    US3807865A|1970-12-18|1974-04-30|M Gordon|Process and apparatus for determination of spinodal and critical points or loci associated with phase transition|
    ZA721510B|1972-03-06|1974-01-30|African Explosives & Chem|Method of and apparatus for determining the concentration of a solution|
    IL43465A|1973-10-23|1976-12-31|Yeda Res & Dev|Gem identification|
    US4377001A|1979-10-29|1983-03-15|Nippon Tensaiseito Kabushiki Kaisha|Method for optical determination of saturation temperature and apparatus therefor|
    JPS6057019B2|1980-02-18|1985-12-12|Nippon Beet Sugar Mfg|
    US4519717A|1982-06-07|1985-05-28|Gca Corporation|On-stream cloud point analyzer|FR2586479B1|1985-08-22|1987-12-18|Elf France|METHOD AND APPLICATION FOR DETERMINING POINT OF DISORDER AND FLOW|
    US4804274A|1986-12-30|1989-02-14|Mobil Oil Corporation|Method and apparatus for determining phase transition temperature using laser attenuation|
    US4886354A|1988-05-06|1989-12-12|Conoco Inc.|Method and apparatus for measuring crystal formation|
    JPH03140840A|1989-10-26|1991-06-14|Hitachi Ltd|Flow cytoanalyser|
    DE4340383C2|1993-08-05|1995-05-18|Alfons Prof Dr Ing Mersmann|Method for measuring the supersaturation of solutions of solid substances in liquids|
    US5758968A|1996-07-15|1998-06-02|Digimelt Inc.|Optically based method and apparatus for detecting a phase transition temperature of a material of interest|
    AU3814701A|2000-02-10|2001-08-20|Univ California|Method and apparatus for measuring birefringent particles|
    US6604852B1|2000-12-09|2003-08-12|Halliburton Energy Services, Inc.|High pressure brine crystallization point apparatus|
    FR2846748B1|2002-10-30|2005-04-22|I S L|METHOD FOR DETERMINING THE DISAPPEARANCE POINT OF CRYSTALS OF PETROLEUM PRODUCTS, AND DEVICE FOR CARRYING OUT SAID METHOD|
    CN101273264A|2005-09-22|2008-09-24|阿凡田国际有限公司|System and method for solubility curve and metastable zone determination|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL8203013A|NL8203013A|1982-07-28|1982-07-28|METHOD AND APPARATUS FOR DETERMINING THE SATURATION TEMPERATURE OF A SOLUTION|
    [返回顶部]