• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 法律状态
  • 优先权
    • 专利摘要:
    H2S is removed from gas containing CO2 by a thioether, thioamide or alkyl thiocarbonate solvent.
    公开号:SU803864A3
    申请号:SU782564901
    申请日:1978-01-06
    公开日:1981-02-07
    发明作者:Блан Клод；Шенар Жан-Ив；Оливо Оливье
    申请人:Сосьете Насьональ Елф Акитэн(Продюксьон) (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to a method for the selective absorption of hydrogen sulphide and sulfur compounds from gas mixtures of natural or synthetic gases, gas from oil refineries in copper factories or gas mixtures, including H ,, S and CO2. There are known methods for separating hydrogen sulfide from a gas mixture by treating it with an absorbent, such as dimethyl sulfoxide dimethylmethyl ethyl, diethyl amide f2, at a temperature of 10-65 ° C and a pressure above 14 atm in a column apparatus. However, the effectiveness of these and sorbents is insufficient. The aim of the invention is to increase the efficiency of the process. This goal is achieved by using thiodiethylene glycol or dimeti. Dithio diethylether, or N-methylthiopyrrolidone as the absorbent during the absorption process at a temperature of 5-80 ° C in a column apparatus at elevated pressure. It is desirable to conduct the process by adding pressure 39.2-98 at. Solvents are used in the mixture. with g 20% water so as to bring the viscosity to below 10 cP. The table compares the properties of the three standard physical solvents (oxygen-containing analogs) and sulfur solvents derived from the first by replacing the sulfur atom with an oxygen atom or very close derivatives (pressure 10 at, temperature 40 ° С). The transition from a solvent saturated with oxygen to a sulfur solvent shows the following: a decrease of only a few percent in the solubility of H2S, which does not create a serious obstacle, since the solubility values remain significant and vary from 1.5 to 3.0 wt.% With atmospheric pressure and (this solubility increases significantly with decreasing temperature), a significant decrease in solubility is the average value of this solubility is 1.8. Thus, the solubility of pr. 40c, which is the ratio
    The solubilities of H2S and CO2 at this temperature are equal, on average, for sulfur solvents to the military solubility, as measured for the respective oxygen-containing solvents.
    The significant selectivities noted in this way increase even more when the temperature is low (10–20 s), and the solubility of H2 is increasing much faster than the solubility of CO2 when the temperature decreases.
    There is also a decrease in the solubility of nasadia hydrocarbons, ceteris paribus, as compared with reference oxygenate $ 5. Solvents. The solubility value is divided by a factor of 3 to 4.
    Below are some absorption properties of one of the solvents of dimethyldithioethylethylether invented in the invention at a pressure of 10 atm.
    Absorption at 40 ° C, wt.% 19
    CO absorption at wt.% 4.0
    Selectivity NlZ / WITH Yari 40 C, wt.%, 75
    Absorption at 15s, wt.% About 57
    CO2 absorption at 15 ° C, wt.% 6, -O
    Selectivity at, wt.% 9.5 CH absorption at 40 ° C, weight. % 0.09
    Absorption of SND at OS, wt.% 0.1
    These low solubilities allow a significant reduction in the turnover of the recovered gases during the first throttling, which causes a significant reduction in production costs compared to known supplies.
    At the same time, the substitution of one or several sulfur atoms by one or several oxygen atoms in one molecule significantly reduces the vapor pressure of the corresponding solids, which is especially valuable for sulfur solvents of the proposed
    of this method, since any loss of the solvent in the purified gas causes, in addition to the additional costs, an increase in the total sulfur content in the purified gas, which is exactly what is being avoided.
    Examples 1 and 2 show the operating conditions and compositions of various gas and liquid streams obtained in installations using the solvents of the invention.
    Example. Crude natural gas composition, vol.%: CH 75, 15, C02. 9.8, 0.2 enters the inlet separator of the unit for selective desulfurization at a temperature of 20 ° C and a total pressure of 80 at. Consumption of raw gas 500 thousand MVcyT. This gas is treated countercurrently in an absorber of 12.5 t / h of N-methylthiopyrrolidone. The temperature in the absorber is 40 ° C. The rich solvent is degassed in a degassing bottle at. 0.2 t / h of gas containing 06.% is extracted: CH 31.4, 46, CO2 22.6, i.e. volume flow represents only 0.77% of the inlet flow. The solvent is regenerated by heating at 12 (f С C and under refluxing, then treated in countercurrent with steam. The resulting acid gas fed to the installation contains,%: 97.1, СН40.2, СО 2.7 (compared to dry)
    EXAMPLE 2 Selective desulfurization of the same gas is carried out as in the previous example. The daily consumption is 2 million m. This gas is treated progovolotochno B absorber 82, bt / h dimetaggitiodiethylether. Absorber temperature -.
    The enriched solvent will expand, as in the previous case, at a pressure of 33 atm. The resulting gas contains,% by volume: CH4 44, HjSjSS, COg 21 The specific consumption of gaseous fuel is 1.24 t / h, i.e. 1.55% of raw gas consumption. The acid gas obtained by generating a solvent has the following composition, vol.%: 91, COg 7.8, 2. The resulting purified gas complies with the technical conditions.
    11.2
    1.2 10.6
    5.5 35.7
    0.12 0.029 0.17 0.0085 1.58 0.88 Solvent Absorption Absorption ftf-CO, wt.% Wt.%
    to
    At 26 s.
    权利要求:
    Claims (2)
    [1]
    1. The patent of France 1430889, cl. With 10 K, published. 1966.
    .
    [2]
    2. Patent of Aiglia 960751, 25 cl. C 5 E, published. 1965 (prototype). Selective-Absorption Elasticity, CH, .pair, H, S / CO, wt.% Mm Hg
    类似技术:
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    US3989811A|1976-11-02|Process for recovering sulfur from fuel gases containing hydrogen sulfide, carbon dioxide, and carbonyl sulfide
    US4242108A|1980-12-30|Hydrogen sulfide concentrator for acid gas removal systems
    SU1309902A3|1987-05-07|Absorbent for selective separation of hydrogen sulphide
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    US5061465A|1991-10-29|Bulk CO2 recovery process
    CA2552644C|2009-10-06|Methods and configurations for acid gas enrichment
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    RU2533146C2|2014-11-20|Method of sulphur removal
    CA1290138C|1991-10-08|Process for the treatment of sulfur containing gases
    US4088735A|1978-05-09|Process for purifying gases from the gasification of fossil fuels
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    US20040060334A1|2004-04-01|Acid gas enrichment process
    CA1205981A|1986-06-17|Simultaneous removal of water and hydrogen sulphidefrom gaseous carbon dioxide
    SU803864A3|1981-02-07|Method of separating hydrogen sulfide from gas mihture
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    US4414004A|1983-11-08|Removal of condensable aliphatic hydrocarbons and acidic gases from natural gas
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    SU1577685A3|1990-07-07|Method of removing carbon diaoxide in presence of hydrogen sulfide from gas
    US4412977A|1983-11-01|Selective acid gas removal
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    同族专利:
    公开号 | 公开日
    GB1555445A|1979-11-07|
    AU3217878A|1979-07-12|
    JPS6139091B2|1986-09-02|
    AU518304B2|1981-09-24|
    FR2376683A1|1978-08-04|
    IT7819049D0|1978-01-06|
    BE862664A|1978-05-02|
    US4144039A|1979-03-13|
    PL108396B1|1980-04-30|
    NL7800139A|1978-07-10|
    PL203864A1|1978-11-06|
    FR2376683B1|1979-04-20|
    IT1092709B|1985-07-12|
    DE2800491A1|1978-07-13|
    CA1099898A|1981-04-28|
    JPS5388681A|1978-08-04|
    DE2800491C2|1986-01-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EA017639B1|2008-03-14|2013-02-28|Тоталь С.А.|Process for drying and demercaptaniization of gaseous mixtures|
    RU2736714C1|2017-03-03|2020-11-19|Дау Глоубл Текнолоджиз Ллк|Method of separating hydrogen sulphide from gaseous mixtures using hybrid mixture of solvents|NL44161C|1934-06-29|
    US3039251A|1959-10-02|1962-06-19|El Paso Natural Gas Prod|Products and process for purifying gases|
    US4020149A|1975-05-02|1977-04-26|Exxon Research And Engineering Company|Process for the production of sulfur|DE2928858C2|1979-07-17|1990-04-05|Linde Ag, 6200 Wiesbaden, De|
    US4348214A|1981-03-31|1982-09-07|Phillips Petroleum Company|Hydrogen sulfide removal with sulfur-containing esters|
    DE3709363C1|1987-03-21|1988-08-18|Metallgesellschaft Ag|Process for treating two loaded wash solution streams|
    US5851265A|1996-09-03|1998-12-22|Monsanto Company|Selective removal and recovery of sulfur dioxide from effluent gases using organic phosphorous solvents|
    CA2985846A1|2015-01-22|2016-07-28|Carbon Clean Solutions Limited|Solvent and method for removing acid gases from a gaseous mixture|
    WO2018164704A1|2017-03-07|2018-09-13|Dow Global Technologies Llc|Process for reducing energy consumption in the regeneration of hybrid solvents|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7700274A|FR2376683B1|1977-01-06|1977-01-06|
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