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    ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM A FLUID STREAM
    1.
    发明申请
    ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM A FLUID STREAM 审中-公开

    公开(公告)号：US20190388829A1

    公开(公告)日：2019-12-26

    申请号：US16556903

    申请日：2019-08-30

    申请人： BASF SE

    发明人： Gerald VORBERG ,  Ralf NOTZ ,  Thomas INGRAM ,  Georg SIEDER ,  Torsten KATZ

    IPC分类号： B01D53/14 ,  C10L3/10

    摘要： 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.

    TWO-STAGE METHOD FOR REMOVING CO2 FROM SYNTHESIS GAS
    2.
    发明申请
    TWO-STAGE METHOD FOR REMOVING CO2 FROM SYNTHESIS GAS 审中-公开

    公开(公告)号：US20190262768A1

    公开(公告)日：2019-08-29

    申请号：US16320183

    申请日：2017-07-27

    申请人： BASF SE

    发明人： Torsten KATZ ,  Ralf NOTZ ,  Christian KUNKELMANN

    IPC分类号： B01D53/14 ,  C01B3/52 ,  C10K1/00

    摘要： In a process for removing CO2 from a fluid stream by means of an aqueous absorption medium, a) the fluid stream is introduced into a first absorption zone and treated with partially regenerated absorption medium, b) the treated fluid stream is treated with regenerated absorption medium in a second absorption zone, giving a fluid stream which has been freed of CO2 and a loaded absorption medium, c) the loaded absorption medium is depressurized in a first flash vessel to a pressure of from 1.2 to 3 bar absolute, giving a sub-partially regenerated absorption medium and a first CO2-comprising gas stream, d) the sub-partially regenerated absorption medium is depressurized in a second flash vessel to a pressure of from 1 to 1.2 bar absolute, giving a partially regenerated absorption medium and a water vapor-comprising, second CO2-comprising gas stream, e) a substream of the partially regenerated absorption medium is fed into the first absorption zone and a further substream of the partially regenerated absorption medium is fed into a stripper in which the partially regenerated absorption medium is thermally regenerated, with regenerated absorption medium and a third CO2-comprising gas stream being obtained and the stripper being operated at a pressure which is at least 0.9 bar higher than the pressure in the first flash vessel, f) the regenerated absorption medium is recirculated to the second absorption zone, g) the water vapor-comprising, second CO2-comprising gas stream is compressed by means of a jet pump and brought into direct heat exchange contact with the loaded absorption medium in the first flash vessel, with the jet pump being operated by means of the third CO2-comprising gas stream. The latent heat of the water vapor-comprising gas streams remains in the process and the use of a costly compressor is dispensable.

    REMOVAL OF HYDROGEN SULPHIDE AND CARBON DIOXIDE FROM A STREAM OF FLUID
    3.
    发明申请
    REMOVAL OF HYDROGEN SULPHIDE AND CARBON DIOXIDE FROM A STREAM OF FLUID 审中-公开

    公开(公告)号：US20190134557A1

    公开(公告)日：2019-05-09

    申请号：US16238069

    申请日：2019-01-02

    申请人： BASF SE

    发明人： Thomas INGRAM ,  Ralf NOTZ ,  Gerald VORBERG ,  Georg SIEDER

    IPC分类号： B01D53/14 ,  C07C217/08

    摘要： A process for removing hydrogen sulfide and carbon dioxide from a fluid stream comprises a) an absorption step in which the fluid stream is contacted with an absorbent comprising an aqueous solution (i) of an amine of the general formula (I) in which R1, R2 and R3 are each independently selected from C1-4-alkyl and C1-4-hydroxyalkyl; each R4 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; each R5 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; X is OH or NH(CR1R2R3); m is 2, 3, 4 or 5; n is 2, 3, 4 or 5; and o is 0 or 1; and optionally (ii) at least one tertiary amine, where the molar ratio of (i) to (ii) is greater than 0.05; wherein at least 90% of the hydrogen sulfide is removed from the fluid stream and selectivity for hydrogen sulfide over carbon dioxide is not greater than 8, wherein a CO2- and H2S-laden absorbent is obtained; b) a regeneration step in which at least a substream of the CO2- and H2S-laden absorbent is regenerated and a regenerated absorbent is obtained; and c) a recycling step in which at least a substream of the regenerated absorbent is recycled into the absorption step a). The process allows a high level of hydrogen sulfide removal with a simultaneously high coabsorption of carbon dioxide.

    REMOVAL OF HYDROGEN SULPHIDE AND CARBON DIOXIDE FROM A STREAM OF FLUID
    4.
    发明申请
    REMOVAL OF HYDROGEN SULPHIDE AND CARBON DIOXIDE FROM A STREAM OF FLUID 审中-公开

    公开(公告)号：US20170282115A1

    公开(公告)日：2017-10-05

    申请号：US15506635

    申请日：2015-08-20

    申请人： BASF SE

    发明人： Thomas INGRAM ,  Ralf NOTZ ,  Gerald VORBERG ,  Georg SIEDER

    IPC分类号： B01D53/14 ,  C07C217/08

    CPC分类号： B01D53/1462 ,  B01D53/1493 ,  B01D2252/2026 ,  B01D2252/20405 ,  B01D2252/2041 ,  B01D2252/20426 ,  B01D2252/20431 ,  B01D2252/20484 ,  B01D2252/502 ,  B01D2252/504 ,  C07C217/08

    摘要： A process for removing hydrogen sulfide and carbon dioxide from a fluid stream comprises a) an absorption step in which the fluid stream is contacted with an absorbent comprising an aqueous solution (i) of an amine of the general formula (I) in which R1, R2 and R3 are each independently selected from C1-4-alkyl and C1-4-hydroxyalkyl; each R4 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; each R5 is independently selected from hydrogen, C1-4-alkyl and C1-4-hydroxyalkyl; X is OH or NH(CR1R2R3); m is 2, 3, 4 or 5; n is 2, 3, 4 or 5; and o is 0 or 1; and optionally (ii) at least one tertiary amine, where the molar ratio of (i) to (ii) is greater than 0.05; wherein at least 90% of the hydrogen sulfide is removed from the fluid stream and selectivity for hydrogen sulfide over carbon dioxide is not greater than 8, wherein a CO2- and H2S-laden absorbent is obtained; b) a regeneration step in which at least a substream of the CO2- and H2S-laden absorbent is regenerated and a regenerated absorbent is obtained; and c) a recycling step in which at least a substream of the regenerated absorbent is recycled into the absorption step a). The process allows a high level of hydrogen sulfide removal with a simultaneously high coabsorption of carbon dioxide.

    CYCLIC AMINE FOR SELECTIVELY REMOVING HYDROGEN SULPHIDE
    5.
    发明申请
    CYCLIC AMINE FOR SELECTIVELY REMOVING HYDROGEN SULPHIDE 审中-公开

    公开(公告)号：US20200030739A1

    公开(公告)日：2020-01-30

    申请号：US16594526

    申请日：2019-10-07

    申请人： BASF SE

    发明人： Thomas INGRAM ,  Georg SIEDER ,  Torsten KATZ ,  Gerald VORBERG ,  Ralf NOTZ

    IPC分类号： B01D53/14 ,  C10L3/10

    摘要： The use of an amine of the formula (I) in which the R1 to R5 radicals are each as defined in the description, and an absorbent and a process for removing acidic gases from a fluid stream, especially for selectively removing hydrogen sulfide over carbon dioxide. The invention also relates to particular amines suitable for selective removal of hydrogen sulfide. Absorbents based on amines of the formula (I) have high selectivity, high loading capacity and good regeneration capacity.

    METHOD FOR SEPARATING C5-C8 HYDROCARBONS AND ACID GASES FROM A FLUID STREAM
    6.
    发明申请
    METHOD FOR SEPARATING C5-C8 HYDROCARBONS AND ACID GASES FROM A FLUID STREAM 审中-公开

    公开(公告)号：US20190039013A1

    公开(公告)日：2019-02-07

    申请号：US16073840

    申请日：2017-02-02

    申请人： BASF SE

    发明人： Torsten KATZ ,  Ralf NOTZ ,  Andreas KERN

    IPC分类号： B01D53/14 ,  C10L3/10

    摘要： A process for removing C5-C8-hydrocarbons and acid gases from a fluid stream is described, where a) the fluid stream is brought into contact with an absorption medium comprising at least one amine in an absorption zone to obtain a deacidified fluid stream and an acid-gases-laden absorption medium, b) the laden absorption medium is heated in a first heat exchanger and decompressed into a decompression zone to a pressure of from 5 to 10 bar to obtain a C5-C8-hydrocarbons-comprising gas phase and a hydrocarbon-depleted laden absorption medium, c) the hydrocarbon-depleted laden absorption medium is heated in an optional second heat exchanger and passed into a stripper in which at a pressure of 1 to 2.5 bar the acid gases are at least partially liberated by supplying heat to obtain a regenerated absorption medium and an acid-gas-comprising stream, and d) the regenerated absorption medium is recycled into the absorption zone.