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    23.
    发明专利
    未知

    公开(公告)号：GR850624B

    公开(公告)日：1985-06-14

    申请号：GR850100624

    申请日：1985-03-12

    Applicant: BASF AG

    Inventor： VOLKAMER KLAUS DR ,  HEFNER WERNER DR ,  WAGNER ECKHART DR ,  WAGNER ULRICH DR

    IPC: B01D53/14

    Abstract: 1. A process for removing CO2 and/or H2 S from a gas containing CO2 and/or H2 S by washing the gas with an aqueous alkanolamine-containing absorption liquid and subsequently regenerating the latter, wherein the aqueous absorption liquid used contains from 3 to 60% by weight of methyldiethanolamine and from 1 to 50% by weight of monoethanolamine, processes with two absorption stages arranged in series, in which regeneration of the laden absorption liquid is carried out using two flash stages and a stripping zone, to the extent they utilize an absorption liquid containing from 0.05 to 1 mole of monoethanolamine per litre, being excluded.

    26.
    发明专利
    未知

    公开(公告)号：DE58902611D1

    公开(公告)日：1992-12-10

    申请号：DE58902611

    申请日：1989-08-16

    Applicant: BASF AG

    Inventor： GERHARDT WOLFGANG DR ,  HEFNER WERNER DR

    IPC: B01D53/40 ,  B01D53/14 ,  B01D53/52 ,  B01D53/62 ,  B01D53/77 ,  C10K1/14

    Abstract: The present invention relates to a process for removing CO2 and possibly H2S from a gas containing CO2 and possibly H2S by means of an absorption fluid, wherein the gas containing CO2 and possibly H2S is treated in an absorption zone with the absorption fluid, the treated gas is extracted from the absorption zone, the absorption fluid laden with CO2 and possibly H2S is then regenerated by expanding the absorption fluid laden with CO2 and possibly H2S in one or more expansion stages and extracting an expansion gas at the top of the first expansion stage or, in the case of more than one expansion stages, at the top of at least one of the first to penultimate expansion stages and feeding, if desired, the partially regenerated absorption fluid obtained from the last expansion stage to a stripping zone for further regeneration, at least one acid gas stream containing the CO2 and possibly H2S being extracted from the regeneration and the regenerated absorption fluid being recycled into the absorption zone, wherein a part stream of fully or partially regenerated absorption fluid is fed to at least one of the expansion stages, from which the expansion gas is extracted, at a point above the feed of the absorption fluid which is to be expanded.

    27.
    发明专利
    未知

    公开(公告)号：DE3864295D1

    公开(公告)日：1991-09-26

    申请号：DE3864295

    申请日：1988-03-23

    Applicant: BASF AG

    Inventor： KAIBEL GERD DR ,  HEFNER WERNER DR ,  KELLER PETER DR ,  DREWITZ WERNER

    IPC: C07C7/08 ,  C07C1/00 ,  C07C7/00 ,  C07C7/04 ,  C07C11/167 ,  C07C67/00

    Abstract: Recovery of 1,3-butadiene (I) from a C4 hydrocarbon stream contg. (I) and small amts. of propyne and C5 hydrocarbons is effected by (a) subjecting the feed to extractive distn. with a selective solvent to obtain a crude butadiene stream, (b) feeding the crude butadiene vapour into a 1st distn. column, (c) passing an overhead liq. stream contg. (I) and lighter impurities from the 1st column to the middle of a 2nd column, (d) passing a liq. side stream contg. (I) and heavier impurities from the stripper section of the 1st column to the bottom of the 2nd column, (e) withdrawing a heavy impurity bottoms stream from the 1st column, (f) withdrawing a light impurity overhead stream from the 2nd column, (g) withdrawing (I) from the stripper section of the 2nd column, and (h) recycling the bottoms stream from the 2nd column to the 1st column in the vicinity of the side stream outlet.

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