• 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:
    A method is disclosed for removing acidic gaseous components from natural gases, this method comprising an initial desulfurization stage employing a selective solvent, then removing carbon dioxide by low temperature distillation, the carbon dioxide providing the cooling effect required for such a condensation, recovering the solvent, absorbing the residual carbon dioxide with the regenerated solvent and recycling the CO2-laden solvent to the desulfurization stage.
    公开号:SU831053A3
    申请号:SU772457005
    申请日:1977-03-05
    公开日:1981-05-15
    发明作者:Пагани Джорджо；Джуэррери Джанфранко；Пери Бруно
    申请人:Снампрогетти Спа (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the processes of absorption purification of natural gases from acidic impurities and can be used in the oil and gas sectors of the industry. A known method of purifying natural gases from acidic impurities by contacting with mouse alkaline salts 1 with alkaline salts. The disadvantage of this method is the toxicity of the process due to the use of an absorber containing the mouse k. The closest to the proposed technical essence and the achieved result is a method of purifying natural gas from carbon dioxide and hydrogen sulfide by absorption by propylene carbonate at 20-120 ° C with subsequent regeneration waste absorber by stripping 2. However, this method is characterized by an insufficiently high degree of extraction of acidic impurities, in particular the content of carbon dioxide in the final gas mixture is 1-3 wt.%. The purpose of the invention is to increase the degree of gas purification. The goal is achieved by the method of purifying natural carbon dioxide from carbon dioxide and hydrogen sulfide by absorption with propylene carbonate at 20–120 ° C, followed by regeneration of the spent absorber by stripping, in which the gas after absorption is fed to low-temperature distillation, and the resulting gas mixture is re-absorbed the regenerated absorber with the return of the latter to the stage of primary absorption. In this case, low-temperature distillation is carried out at a temperature of the top of the column of minus 30-35 ° C and a pressure of 60-80 kg / cm. Also re-absorption is carried out at 3-20s and a pressure of 60-80 kg / cm. This method allows to significantly increase the degree of extraction of acidic impurities, in particular the residual content of carbon dioxide in the gas mixture is only 50 parts per million (ppm). Example. Natural gas, which is rich in acid gases, is directed to the first absorption stage at room temperature. Absorption of hydrogen sulfide is carried out using propylene carbeneate as a solvent at a flow rate of 510 cubic feet / day, pressure of 150 atm and temperature. Natural gas is absorbed to a hydrogen sulfide content of 5 ppm and a residual carbon dioxide content of 69%. The solvent and the substances dissolved in it are sent for regeneration by stripping under a pressure of 80 kg / cm. as a result, the gaseous phase is separated, and this phase contains a natural amount of methane. The liquid phase is withdrawn from the collector and injected at a minus into the upper part of the distillation column. Natural gas, still containing carbon dioxide (20/20 vol.%), Is sent to re-absorption into the column, where carbon dioxide is sorbed by the solvent supplied from the regeneration column according to the flow principle with respect to the gas stream. The purified gas is removed from the column. The gas has a residual content of carbon dioxide 50 ppm and hydrogen sulfide 5 ppm by volume.
    权利要求:
    Claims (3)
    [1]
    Claims 1. Method for purifying natural gas from carbon dioxide and hydrogen sulphide
    by absorption by propylene carbonate at 20-120 ° C with subsequent recovery of the spent absorber by stripping, characterized in that, in order to improve the purity, the gas after absorption is fed to the low-temperature distillation, and the resulting gas mixture is subjected to repeated absorption by the regenerated absorber with the gas the latter at the stage of primary absorption.
    [2]
    2. The method according to claim 1, wherein the low-temperature distillation is carried out at
    15 temperature of the top of the column minus 3035 ° C and a pressure of 60-80 kg / cm.
    [3]
    3. The method according to claims 1 and 2, which is based on the fact that
    20 absorption is carried out at 3-20s and a pressure of 60-80 kg / cmL
    Sources of information taken into account in the examination
    1. Cole A. L. and Rizenfeld F.S. Gas cleaning. M., 1968, pp. 108-109.
    2. Semenova TD and others. Purification of process gases. M., 1969, pp. 196-197 (prototype).
    类似技术:
    公开号 | 公开日 | 专利标题
    SU831053A3|1981-05-15|Method of natural gas purification from carbon dioxide and hydrogen sulfide
    US4242108A|1980-12-30|Hydrogen sulfide concentrator for acid gas removal systems
    US4372925A|1983-02-08|Process for the removal of acid gases from gas mixtures containing methane
    US3864460A|1975-02-04|Method for removing hydrogen sulfide from hydrocarbon gas streams without pollution of the atmosphere
    US4080424A|1978-03-21|Process for acid gas removal from gaseous mixtures
    KR20010049513A|2001-06-15|Carbon dioxide recovery with composite amine blends
    US5820837A|1998-10-13|Process for treating a gas stream to selectively separate acid gases therefrom
    CA1252608A|1989-04-18|Method and apparatus for selective absorption ofhydrogen sulphide from gas streams containinghydrogen sulphide and carbon dioxide
    US3745746A|1973-07-17|Dehydration process
    US7157070B2|2007-01-02|Method for purifying gas containing hydrocarbons
    US3505784A|1970-04-14|Scrubbing process for removing carbon dioxide from low-sulfur fuel gases or synthesis gases
    US3918934A|1975-11-11|Process for purifying gases
    US3324627A|1967-06-13|Process for the purification of gases
    US3710546A|1973-01-16|Process for the removal of hydrogen sulfide and carbon dioxide from fuel gases and synthesis gases
    WO2014005817A1|2014-01-09|Integrated process for native co2 recovery from a sour gas comprising h2s and co2
    US4345918A|1982-08-24|Process for purification of gas streams
    EP0496563A2|1992-07-29|Simultaneous removal of residual impurities and moisture from a gas
    US4057403A|1977-11-08|Gas treating process
    US4412977A|1983-11-01|Selective acid gas removal
    MY118691A|2005-01-31|Process for the removal and high-pressure recovery of carbon dioxide from a high-pressure raw gas and system therefor
    US4332598A|1982-06-01|Process for treating industrial gas stream
    US4025322A|1977-05-24|Removal of hydrocarbons and water from acid gas streams
    US4299801A|1981-11-10|Regenerating alkanolamine desulfurizer solutions
    US4460385A|1984-07-17|Process for the removal of acid gases from hydrocarbon gases containing the same
    RU2080908C1|1997-06-10|Method of isolating hydrogen sulfide from gas
    同族专利:
    公开号 | 公开日
    GB1555068A|1979-11-07|
    AU2274377A|1978-09-07|
    DE2709501C3|1980-12-11|
    IT1056904B|1982-02-20|
    TR19116A|1978-07-01|
    US4097250A|1978-06-27|
    DE2709501B2|1980-04-17|
    NZ183409A|1979-03-16|
    FR2342776B1|1980-02-15|
    DE2709501A1|1977-09-08|
    FR2342776A1|1977-09-30|
    AU503703B2|1979-09-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1494808B2|1966-10-14|1976-05-06|PROCEDURE FOR CLEANING UP COMBUSTION GASES OR SYNTHESIS GASES|
    US3824766A|1973-05-10|1974-07-23|Allied Chem|Gas purification|US4238206A|1979-03-05|1980-12-09|Columbia Gas System Service Corporation|Using solvents for acidic gas removal|
    DE2909335A1|1979-03-09|1980-09-18|Linde Ag|METHOD AND DEVICE FOR DISASSEMBLING NATURAL GAS|
    DE2928858C2|1979-07-17|1990-04-05|Linde Ag, 6200 Wiesbaden, De|
    US4462814A|1979-11-14|1984-07-31|Koch Process Systems, Inc.|Distillative separations of gas mixtures containing methane, carbon dioxide and other components|
    FR2479021B1|1980-03-31|1984-05-18|Elf Aquitaine|
    US4293322A|1980-04-23|1981-10-06|Helix Technology Corporation|Distillative separation of carbon dioxide from hydrogen sulfide|
    IT1211081B|1981-07-23|1989-09-29|Snam Progetti|CRYOGENIC PROCEDURE FOR REMOVAL OF ACID GASES FROM GAS MIXTURES.|
    MTP913B|1981-07-23|1984-04-10|Snam Progetti|Cryogenic process for fracionally removing audie gases from gas mixtures|
    DE3148520A1|1981-12-08|1983-07-21|Linde Ag, 6200 Wiesbaden|"METHOD FOR REMOVING ACID GASES FROM GAS MIXTURES"|
    IT1193601B|1983-01-19|1988-07-21|Snam Progetti|CRYOGENIC PROCEDURE FOR SELECTIVE REMOVAL OF ACID GASES FROM SOLVENT GAS MIXTURES|
    IT1193602B|1983-01-19|1988-07-21|Snam Progetti|CRYOGENIC PROCEDURE FOR REMOVAL OF ACID GASES FROM GAS MIXTURES BY SOLVENT|
    AU3097484A|1983-07-26|1985-01-31|Bechtel International Corporation|Desulfurization of fuel gas|
    US4511382A|1983-09-15|1985-04-16|Exxon Production Research Co.|Method of separating acid gases, particularly carbon dioxide, from methane by the addition of a light gas such as helium|
    US4563202A|1984-08-23|1986-01-07|Dm International Inc.|Method and apparatus for purification of high CO2 content gas|
    IT1190359B|1985-05-24|1988-02-16|Snam Progetti|CRYOGENIC PROCEDURE FOR REMOVAL OF ACID GASES FROM GAS MIXTURES BY SOLVENT|
    IT1190356B|1985-05-24|1988-02-16|Snam Progetti|ORIOGENIC PROCEDURE FOR SELECTIVE REMOVAL OF ACID GASES FROM GAS MIXTURES BY SOLVENT|
    IT1190357B|1985-05-24|1988-02-16|Snam Progetti|CRYOGENIC PROCEDURE FOR REMOVAL OF ACID GASES FROM GAS MIXTURES BY SOLVENT|
    US4675035A|1986-02-24|1987-06-23|Apffel Fred P|Carbon dioxide absorption methanol process|
    DE3704882C2|1987-02-17|1989-03-23|Metallgesellschaft Ag, 6000 Frankfurt, De|
    AR007346A1|1996-06-05|1999-10-27|Shell Int Research|A METHOD FOR SEPARATING CARBON DIOXIDE, ETHANE, AND HEAVIER COMPONENTS FROM A HIGH PRESSURE NATURAL GAS FLOW|
    US5733516A|1996-09-09|1998-03-31|Gas Research Institute|Process for removal of hydrogen sulfide from a gas stream|
    FR2760653B1|1997-03-13|1999-04-30|Inst Francais Du Petrole|DEACIDIFICATION PROCESS WITH PRODUCTION OF ACID GAS IN LIQUID PHASE|
    US5983663A|1998-05-08|1999-11-16|Kvaerner Process Systems, Inc.|Acid gas fractionation|
    US6605138B2|1999-04-21|2003-08-12|Matthew T. Frondorf|Apparatus and method for exclusively removing VOC from regeneratable solvent in a gas sweetening system|
    FR2796858B1|1999-07-28|2002-05-31|Technip Cie|PROCESS AND PLANT FOR PURIFYING A GAS AND PRODUCTS THUS OBTAINED|
    US6183540B1|1999-08-27|2001-02-06|Kinder Morgan, Inc.|Method and apparatus for removing aromatic hydrocarbons from a gas stream prior to an amine-based gas sweetening process|
    FR2848121B1|2002-12-04|2005-01-28|Inst Francais Du Petrole|PROCESS FOR TREATING AN ACIDIC NATURAL GAS|
    US6929680B2|2003-09-26|2005-08-16|Consortium Services Management Group, Inc.|CO2 separator method and apparatus|
    US7201019B2|2004-11-19|2007-04-10|Praxair Technology, Inc.|Light gas component separation from a carbon dioxide mixture|
    US7699914B1|2005-12-09|2010-04-20|Morrow Luke N|Triple-effect absorption system for recovering methane gas|
    US7645322B2|2006-09-15|2010-01-12|Ingersoll Rand Energy Systems Corporation|System and method for removing water and siloxanes from gas|
    CN102971253B|2010-02-02|2015-06-17|英国备选能源国际有限公司|Separation of gases|
    US8840708B1|2011-09-02|2014-09-23|David C. Morrow|Landfill gas treatment|
    US9340739B1|2011-09-02|2016-05-17|David C. Morrow|Enhanced landfill gas treatment|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT20900/76A|IT1056904B|1976-03-05|1976-03-05|PROCEDURE FOR THE PURIFICATION OF NATURAL GASES WITH HIGH CONTENT OF ACID GASES|
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