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    PROCESS FOR REMOVAL OF CO2 AND/OR H2S FROM GASSES
    12.
    发明专利
    PROCESS FOR REMOVAL OF CO2 AND/OR H2S FROM GASSES 未知

    公开(公告)号：YU43985A

    公开(公告)日：1987-12-31

    申请号：YU43985

    申请日：1985-03-19

    Applicant: BASF AG

    Inventor： VOLKAMER K ,  HEFNER W ,  WAGNER E ,  WAGNER U

    IPC: B01D53/14 ,  C10L3/00 ,  C10K1/14

    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.

    13.
    发明专利
    未知

    公开(公告)号：BR8001259A

    公开(公告)日：1980-11-04

    申请号：BR8001259

    申请日：1980-03-03

    Applicant: BASF AG

    Inventor： VOLKAMER K ,  LINDNER A ,  WAGNER U

    IPC: C07C1/00 ,  C07C7/148 ,  C07C11/09 ,  C07C41/01 ,  C07C41/06 ,  C07C41/44 ,  C07C43/04 ,  C07C67/00 ,  C07C5/00

    Abstract: A process for isolating isobutene from C4-hydrocarbon mixtures containing isobutene by reacting the mixture with a primary alcohol in the presence of an acid condensing agent, to form the tertiary ether, separating off the unconverted hydrocarbons and decomposing the tertiary ether in the presence of an acid catalyst at an elevated temperature, wherein a primary C3- or C4-alcohol is used and the temperature at which the reaction mixture leaves the etherification stage, in which the tertiary ether is formed, is lower than the mean temperature in the etherification stage.

    14.
    发明专利
    未知

    公开(公告)号：SE7806079L

    公开(公告)日：1978-11-29

    申请号：SE7806079

    申请日：1978-05-26

    Applicant: BASF AG

    Inventor： STOCKBURGER D ,  VOLKAMER K ,  BENDER D ,  SCHNEIDER K-J ,  SCHWENTKER H ,  WAGNER U ,  WEITZ H-M

    IPC: B01D3/40 ,  C07C1/00 ,  C07C7/08 ,  C07C9/00 ,  C07C11/00 ,  C07C11/167 ,  C07C67/00 ,  C10G7/00

    Abstract: A process for separating, by means of a selective solvent, a mixture of C4-hydrocarbons which contains some hydrocarbons which are more soluble in the selective solvent and some which are less soluble therein, in which process the hydrocarbon mixture is separated, in an extractive distillation zone, into a top product which contains the less soluble hydrocarbons and an extract which contains the more soluble hydrocarbons and the selective solvent, the extract, taken off as the bottom product, is subjected to a flash evaporation and the resulting vapor component of the extract is recycled to the extractive distillation zone while the liquid phase remaining after the flash evaporation is fed to a solvent recovery zone, in which the liquid phase obtained from the flash evaporation is separated into a product containing the hydrocarbons and, as the bottom product, the selective solvent which has been freed from the hydrocarbons, the resulting selective solvent is recycled to the extractive distillation zone and the product which is obtained from the solvent recovery zone and contains the hydrocarbons is partially or completely recycled to the extractive distillation zone, after increasing the pressure in a compression zone, in which process the extract taken off the extractive distillation zone is brought, prior to the flash evaporation to a higher pressure than the pressure in the extractive distillation zone and thereafter the extract which is under this higher pressure is heated, in a heat exchange zone, by indirect heat exchange with the selective solvent obtained as the bottom product from the solvent recovery zone, and the heated extract is subsequently let down, in the flash evaporation, to a pressure which is at least equal to the pressure in the extractive distillation zone and is higher than the pressure in the solvent recovery zone.

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