• 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 process for removal of CO2 and, if present H2S, from a gas mixture, in which a) the gas mixture is contacted at elevated pressure countercurrently with a solvent comprising a tertiary amine and a physical absorbent; b) the loaded solvent obtained is flashed to a pressure higher than the total partial pressure of CO2 and H2S present in the loaded solvent at the prevailing temperature; c) the loaded solvent obtained in step b) is flashed to a pressure below the total partial pressure of CO2 and H2S present in the loaded solvent at the prevailing temperature, and semi-lean solvent obtained in step c) is, optionally after all or part thereof has been totally regenerated, used as solvent in step a).
    公开号:SU1577685A3
    申请号:SU823450439
    申请日:1982-06-14
    公开日:1990-07-07
    发明作者:Вилльям Макюан Мэлколм；Мария Ван Дер Пас-Тоорнстра Хильда
    申请人:Шелл Интернэшнл Рисерч Маатсхаппий Б.В.(Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a method for removing carbon dioxide in the presence of hydrogen sulfide from a gas mixture.
    The purpose of the invention is to increase the degree of purification.
    Example 1. 1000 kmol / h of the gas mixture (mixture of 80 vol.% CH, 5 vol.% Of the stage, 3% propane, 1% butane, 1% Hz and 10% GO.J) are introduced into the bottom of the absorption column containing 30 valve plates at a temperature of 40 ° C and a pressure of 50 bar. This backflow gas mixture is brought into contact with 300 m3 / n depleted scavenger,
    containing 50 wt.% methyldiethanol-amine, 25% sulfolane and 25% water. The purified gas is withdrawn through the upper part of the absorption column in the amount of 9,511.4 kmol / H, and this gas contains 644 kmol / h CO2 and less than 4 parts by vol. per million of hydrogen sulfide. The saturated solvent (300 m3 / h is removed through the bottom of the absorption column; it contains 99.7 kmol / h H9S and 356 kmol / h CO;;. This saturated absorber is evaporated by rapidly reducing the pressure to 15 bar at 69.2 C. Evaporative gas (45 kmol / h
    ate -
    about
    00
    SL

    s
    contains 1.4 kmol / h HS and 10.7 kmol / h CO, the rest is hydrocarbons. The primary scavenger after the first evaporation stage contains 98.6 kmol / h Nd3 and 345 kmol / h C02, it is heated by heat exchange with a lean solvent and re-evaporated by rapidly reducing the pressure to 1.3 bar at. The gas released in the free form at the second evaporation stage (293.6 kmol / h) consists of 35.6 kmol / h HjS and 258 kmol / h C02. Its countercurrent is brought into contact with 148 m3 / h of depleted solvent in a second absorption column with 13 valve trays at 40 ° C and a pressure of 1.1 bar, to obtain 212 kmol / h of gas, which consists of C0t comprising 300 h. per million The saturated absorber obtained in the last stage contains
    63 kmol / h N S
    and
    87 kmol / h С0г. Regeneration is carried out by evaporation with steam and a gas is obtained, which consists of 98.6 kmol / h H4S and 133 kmol / h CO.J, and this gas can be used in the Claus process. The regenerated depleted absorber obtained after regeneration (448 m3 / h), partially (148 m3 / h) is recycled to the second column at the absorption stage, partially (300 m3 / h)
    s
    0
    5 th
    after heat exchange with a saturated absorber after the first evaporation, is used as an absorber at the absorption stage. The data for the examples are presented in the table.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A method for purifying gas from carbon dioxide in the presence of hydrogen sulfide, including the absorption of impurities by an absorber containing an aqueous solution of an amine and a physical solvent under pressure, reducing the pressure of the reaction mixture with separating the gas phase, regenerating the saturated absorber and returning it to the absorption stage, characterized in that in order to increase the degree of purification, an aqueous solution containing 30-50% by weight of methyldiethanolamine and 15-35% by weight of sulfolane is used as an absorber, and the mixture is reduced in two Upenu, wherein the first - to a pressure higher than the total partial pressure of carbon dioxide and hydrogen sulfide in the saturated absorber at a temperature of absorption and in the second - to a pressure below the total partial pressure of any one of these components at the first stage.
    Table continuation
    Note. The molar ratio H S / CO 98/945 with the known method, NZ / CO2-98.6 / 133 with the proposed method.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1577685A3|1990-07-07|Method of removing carbon diaoxide in presence of hydrogen sulfide from gas
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    US5246619A|1993-09-21|Solvent composition for removing acid gases
    CA1201871A|1986-03-18|Process for the removal of hydrogen sulfide fromgaseous mixtures with strongly basic tertiary aminocompounds
    US4483834A|1984-11-20|Gas treating process for selective H2 S removal
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    CA1113723A|1981-12-08|Process for the removal of acidic gases
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    US4001386A|1977-01-04|Process for H2 S removal employing a regenerable polyalkanolamine adsorbent
    US4025322A|1977-05-24|Removal of hydrocarbons and water from acid gas streams
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    同族专利:
    公开号 | 公开日
    NL8202061A|1983-01-03|
    DZ429A1|2004-09-13|
    DK162192B|1991-09-30|
    JPS57209626A|1982-12-23|
    BR8203471A|1983-06-07|
    ES513052A0|1983-02-16|
    DE3222281C2|1997-10-23|
    IT1210895B|1989-09-29|
    NL193746C|2000-09-04|
    AU546704B2|1985-09-12|
    NO154785C|1986-12-29|
    KR840000263A|1984-02-18|
    NL193746B|2000-05-01|
    FR2507498A1|1982-12-17|
    JPH0221286B2|1990-05-14|
    FR2507498B1|1988-11-25|
    DK162192C|1992-02-17|
    IN156408B|1985-07-20|
    NO154785B|1986-09-15|
    AU8484982A|1982-12-23|
    PL236913A1|1983-02-14|
    ES8303935A1|1983-02-16|
    CA1205276A|1986-06-03|
    IT8221849D0|1982-06-14|
    GB2103645B|1984-03-21|
    ZA824163B|1983-04-27|
    DK266382A|1982-12-16|
    DE3222281A1|1982-12-30|
    GB2103645A|1983-02-23|
    NO821968L|1982-12-16|
    BE893386A|1982-12-02|
    NZ200951A|1985-02-28|
    DD202129A5|1983-08-31|
    引用文献:
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    RU2462296C2|2007-09-20|2012-09-27|Свапсол Корп.|Method of decomposing carbonaceous materials, composition and system for realising said method|
    RU2520120C2|2008-10-30|2014-06-20|Гельмгольтц-Центрум фюр Умвельтфоршунг ГмбХ-УФЦ|Device and method for sanation and separation of gas accumulation from waters|US3242640A|1962-12-27|1966-03-29|Union Oil Co|Removal of acid constituents from gas mixtures|
    DE1494809C3|1966-10-25|1974-01-17|Metallgesellschaft Ag, 6000 Frankfurt|Process for scrubbing carbon dioxide from low-sulfur or sulfur-free gases|
    US3770622A|1970-12-28|1973-11-06|Fluor Corp|Treatment of wet natural gas mixtures to recover liquid hydrocarbons|
    DE2226215C3|1972-05-30|1975-09-25|Metallgesellschaft Ag, 6000 Frankfurt|Process for the regeneration of a loaded absorbent which is obtained when acidic components are washed out of gases|
    US4025322A|1975-05-19|1977-05-24|Shell Oil Company|Removal of hydrocarbons and water from acid gas streams|
    GB1589231A|1977-04-21|1981-05-07|Shell Int Research|Process for the removal of acidic gases|IT1132170B|1980-07-04|1986-06-25|Snam Progetti|SELECTIVE SEPARATION PROCESS OF HYDROGEN SULFURATED FROM GASEOUS MIXTURES CONTAINING ALSO CARBON DIOXIDE|
    IT1177324B|1984-11-26|1987-08-26|Snam Progetti|PROCEDURE FOR SELECTIVELY REMOVING HYDROGEN SULFUR FROM GASEOUS MIXTURES CONTAINING ALSO CARBON DIOXIDE|
    NL8600030A|1986-01-09|1987-08-03|Shell Int Research|REMOVAL OF ACID GASES FROM A GAS MIX.|
    JPH01135518A|1987-11-20|1989-05-29|Seitetsu Kagaku Co Ltd|Absorptive inhibition process employing sulfolane|
    GB8830199D0|1988-12-23|1989-02-22|Shell Int Research|Removing hydrogen sulphide from a gas mixture|
    US5397556A|1992-12-16|1995-03-14|The Regents Of The Unviversity Of California|Process for recovery of sulfur from acid gases|
    US5508012A|1993-03-05|1996-04-16|Quaker Chemical Corporation|Methods for recovering sodium sulfides from a sulfur scavenging reaction|
    US5347003A|1993-03-05|1994-09-13|Quaker Chemical Corporation|Methods for regenerating a sulfur scavenging compound from a product of a sulfur scavenging reaction|
    US5698171A|1996-01-10|1997-12-16|Quaker Chemical Corporation|Regenerative method for removing sulfides from gas streams|
    US5885538A|1997-07-02|1999-03-23|Quaker Chemical Corporation|Method and composition for the regeneration of an aminal compound|
    EP0918049A1|1997-10-27|1999-05-26|Shell Internationale Researchmaatschappij B.V.|Process for the purification of an alkanolamine|
    FR2820430B1|2001-02-02|2003-10-31|Inst Francais Du Petrole|PROCESS FOR DEACIDIFYING A GAS WITH WASHING OF DESORBED HYDROCARBONS DURING THE REGENERATION OF THE SOLVENT|
    EP1565248A1|2002-11-28|2005-08-24|Shell Internationale Researchmaatschappij B.V.|Process for removing sulphur compounds including hydrogen sulphide and mercaptans from gas streams|
    CN102665861A|2009-09-29|2012-09-12|氟石科技公司|Gas Purification Configurations And Methods|
    RU2739735C9|2016-02-08|2021-06-25|Басф Се|Method for separating c5–c8 hydrocarbons and acid gases from a fluid medium stream|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8118288|1981-06-15|
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