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    Absorbent and process for selectively removing hydrogen sulfide
    1.
    发明授权
    Absorbent and process for selectively removing hydrogen sulfide 有权

    公开(公告)号：US11458433B2

    公开(公告)日：2022-10-04

    申请号：US16643665

    申请日：2018-08-30

    Applicant: BASF SE ,  ExxonMobil Research and Engineering Company

    Inventor： Martin Ernst ,  Gerald Vorberg ,  Thomas Ingram ,  Georg Sieder ,  Carla Pereira

    IPC: B01D53/14

    Abstract: An absorbent for the selective removal of hydrogen sulfide over carbon dioxide from a fluid stream, wherein the absorbent contains an aqueous solution, comprising an amine of formula (I) and/or an amine of formula (II) wherein U—V—W is CH—O—CHR5, N—CO—CHR5 or N—CO—NR5; U′—V′—W is C—O—CR5; R1 is independently C1-C5-alkyl; R2 is selected from hydrogen and C1-C5-alkyl; R3 is independently selected from hydrogen and C1-C5-alkyl; R4 is independently selected from hydrogen and C1-C5-alkyl; R5 is selected from hydrogen, C1-C5-alkyl, (C1-C5-alkoxy)-C1-C5-alkyl, and hydroxy-C1-C5-alkyl; and x is an integer from 1 to 10. The absorbent has a reduced tendency for phase separation at temperatures falling within the usual range of regeneration temperatures for the aqueous amine mixtures and a low volatility in aqueous solvents.

    Absorbent for selective removal of hydrogen sulfide from a fluid stream
    5.
    发明授权
    Absorbent for selective removal of hydrogen sulfide from a fluid stream 有权

    公开(公告)号：US11369919B2

    公开(公告)日：2022-06-28

    申请号：US16556903

    申请日：2019-08-30

    Applicant: BASF SE

    Inventor： Gerald Vorberg ,  Ralf Notz ,  Thomas Ingram ,  Georg Sieder ,  Torsten Katz

    IPC: B01D53/52 ,  B01D53/14 ,  B01D53/78 ,  B01D53/96 ,  C07C217/08 ,  C07C217/28 ,  C07C217/42 ,  C10L3/10

    Abstract: An absorbent for selective removal of hydrogen sulfide over carbon dioxide from a fluid stream comprises an aqueous solution of a) a tertiary amine, b) a sterically hindered secondary amine of the general formula (I) in which R1 and R2 are each independently selected from C1-4-alkyl and C1-4-hydroxyalkyl; R3, R4, R5 and R6 are each independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl, with the proviso that at least one R4 and/or R5 radical on the carbon atom bonded directly to the nitrogen atom is C1-4-alkyl or C1-4-hydroxyalkyl when R3 is hydrogen; x and y are integers from 2 to 4 and z is an integer from 1 to 4; where the molar ratio of b) to a) is in the range from 0.05 to 1.0, and c) an acid in an amount, calculated as neutralization equivalent relative to the protonatable nitrogen atoms in a) and b), of 0.05 to 15.0%. One preferred amine of the formula I is 2-(2-tert-butylaminoethoxy)ethanol. The absorbent allows a defined H2S selectivity to be set at pressures of the kind typical in natural gas processing.

    REMOVING ACID GASES FROM WATER VAPOUR-CONTAINING FLUID STREAMS
    8.
    发明申请
    REMOVING ACID GASES FROM WATER VAPOUR-CONTAINING FLUID STREAMS 有权
    从含水蒸汽流体流中去除酸性气体

    公开(公告)号：US20130230440A1

    公开(公告)日：2013-09-05

    申请号：US13780377

    申请日：2013-02-28

    Applicant: BASF SE

    Inventor： Torsten Katz ,  Christian Riemann ,  Georg Sieder

    IPC: B01D53/14

    CPC classification number: B01D53/1456 ,  B01D53/1425 ,  B01D53/1475 ,  B01D53/1493 ,  B01D53/263 ,  B01D53/265 ,  B01D2252/202 ,  B01D2252/2053 ,  B01D2252/40 ,  B01D2252/504 ,  B01D2256/24 ,  B01D2257/302 ,  B01D2257/304 ,  B01D2257/306 ,  B01D2257/308 ,  B01D2257/408 ,  B01D2257/504 ,  B01D2257/80 ,  B01D2258/0283 ,  B01D2258/05

    Abstract: A process for removing acid gases from a water vapour-containing fluid stream comprises a) providing an absorption liquid which is incompletely miscible with water; b) treating the fluid stream in an absorption zone with the absorption liquid to obtain an acid gas-depleted treated fluid stream and an acid gas-loaded absorption liquid; c) directing the treated fluid stream to a rehydration zone and treating the fluid stream with an aqueous liquid to volatilize at least part of the aqueous liquid; d) regenerating the loaded absorption liquid to expel the acid gases at least in part and obtain a regenerated absorption liquid, and directing the regenerated absorption liquid to step b); and e) separating, from the absorption liquid, an aqueous liquid that has condensed in the absorption zone, and directing the aqueous liquid to step c). The process allows for an efficient removal of water accumulated in the absorption liquid system.

    Abstract translation: 从含水蒸汽的流体流中除去酸性气体的方法包括：a）提供与水不完全混溶的吸收液体; b）用吸收液处理吸收区中的流体流以获得贫酸废气处理流体流和酸性气体负载吸收液; c）将经处理的流体流引导至再水化区并用水性液体处理流体物流以使至少部分水性液体挥发; d）再生装载的吸收液体至少部分地排出酸性气体，并获得再生的吸收液体，并将再生的吸收液体引导到步骤b）; 以及e）从吸收液体中分离在吸收区中冷凝的水性液体，并将水性液体引导到步骤c）。 该方法允许有效地去除积聚在吸收液体系统中的水。

    Premix for producing an absorption agent for removing acid gases from a fluid flow
    10.
    发明授权
    Premix for producing an absorption agent for removing acid gases from a fluid flow 有权

    公开(公告)号：US11045759B2

    公开(公告)日：2021-06-29

    申请号：US16093731

    申请日：2017-04-06

    Applicant: BASF SE

    Inventor： Thomas Ingram ,  Gerald Vorberg ,  Georg Sieder

    IPC: B01D53/14 ,  C10L3/10

    Abstract: A premixture for producing an absorbent for removing acid gases from a fluid stream containing a) at least a tertiary amine and/or a sterically hindered secondary amine; b) a dicarboxylic acid in an amount, calculated as neutralization equivalent based on the protonatable nitrogen atoms in a), of at least 30%, wherein the dicarboxylic acid has a solubility in water at a temperature of 20° C. of not more than 15 g of dicarboxylic acid per 100 g of water; and c) 20 to 80 wt % of water. Also described is a process for producing an absorbent from the premixture. The premixture is a transportable and readily handleable solution of a dicarboxylic acid having poor solubility in water for producing an absorbent for removing acid gases from a fluid stream.

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