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    ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM A FLUID STREAM
    64.
    发明专利
    ABSORBENT FOR SELECTIVE REMOVAL OF HYDROGEN SULFIDE FROM A FLUID STREAM 未知

    公开(公告)号：CA2959700C

    公开(公告)日：2022-11-08

    申请号：CA2959700

    申请日：2015-08-20

    Applicant: BASF SE

    Inventor： VORBERG GERALD ,  NOTZ RALF ,  INGRAM THOMAS ,  SIEDER GEORG ,  KATZ TORSTEN

    IPC: B01D53/14 ,  C10L3/10

    Abstract: An absorbent for selective removal of hydrogen sulfide 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 0.3 to 0.7, and c) an acid in an amount, calculated as neutralization equivalents relative to the protonatable nitrogen atoms in a) and b), of 1.0 to 9.0%. One preferred amine of the formula 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. In addition, a process for removing acidic gases from a fluid stream having a partial H2S pressure of at least 0.1 bar and/or a partial CO2 pressure of at least 0.2 bar by means of this absorbent.

    Method for separating acid gases from an aqueous flow of fluid
    66.
    发明专利
    Method for separating acid gases from an aqueous flow of fluid 未知

    公开(公告)号：AU2013311886B2

    公开(公告)日：2017-09-07

    申请号：AU2013311886

    申请日：2013-08-19

    Applicant: BASF SE

    Inventor： KATZ TORSTEN ,  BARTLING KARSTEN

    IPC: B01D53/14

    Abstract: A method for separating acid gases from an aqueous flow of fluid is described, according to which method a) the aqueous flow of fluid is brought into contact in an absorption area with an absorbent which contains at least one amine, wherein a deacidified flow of fluid and an absorbent charged with acid gases are obtained; b) the deacidified flow of fluid is brought into contact in a washing area with an aqueous washing fluid in order to transfer, at least partially, carried amine into the washing fluid, wherein a deaminated, deacidified flow of fluid and an amine-charged washing fluid are obtained; c) the deaminated, deacidified flow of fluid is cooled downstream of the washing area, wherein an absorber top condensate is condensed out of the deaminated, deacidified flow of fluid; d) the charged absorbent is guided into a desorption area in which the acid gases are at least partially released, wherein a regenerated absorbent and desorbed acid gases are obtained; e) the regenerated absorbents are guided back into the absorption area in order to form an absorbent cycle; f) the amine-charged washing fluid and the absorber top condensate are introduced into the absorbent cycle; and g) the desorbed acid gases are guided through a reinforcement area and the acid gases coming out of the top of the reinforcement area are cooled, in order to condense a desorber top condensate out of the acid gases, which desorber top condensate is partially guided back into the reinforcement area and is partially guided out of the method. The method allows an efficient retention of amines from the treated flows of fluid while maintaining the water balance of the acid gas removal installation.

    Removing sulphur oxides from a fluid stream
    68.
    发明专利
    Removing sulphur oxides from a fluid stream 未知

    公开(公告)号：AU2013224898B2

    公开(公告)日：2017-02-23

    申请号：AU2013224898

    申请日：2013-03-01

    Applicant: BASF SE ,  RES TRIANGLE INST

    Inventor： KATZ TORSTEN ,  RIEMANN CHRISTIAN ,  BARTLING KARSTEN ,  RIGBY SEAN TAYLOR ,  COLEMAN LUKE JAMES IVOR ,  LAIL MARTY ALAN

    IPC: B01D53/14 ,  B01D53/50 ,  C01B17/60

    Abstract: A process for removing sulphur oxides from a fluid stream,such as flue gas, that comprises a) providing a non-aqueous absorption liquid containing at least one hydrophobic amine, the non-aqueous absorption liquid being incompletely miscible with water; b) treating the fluid stream in an absorption zone with the non-aqueous absorption liquid to transfer at least part of the sulphur oxides into the non-aqueous absorption liquid and to form a sulphur oxide-hydrophobic amine-complex; c)causing the non-aqueous absorption liquid to be in liquid-liquid contact with an aqueous liquid where by at least part of the sulphur oxide-hydrophobic amine-complex is hydrolyzed to release the hydrophobic amine and sulphurous hydrolysis products, and at least part of the sulphurous hydrolysis products is transferred into the aqueous liquid; d)separating the aqueous liquid from the non-aqueous absorption liquid. The process mitigates absorbent degradation problems caused by sulphur dioxide and oxygen in flue gas.

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