中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

4 records (took 0.019 seconds)

    2.
    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.

    3.
    发明专利
    未知

    公开(公告)号：BR8001594A

    公开(公告)日：1980-11-18

    申请号：BR8001594

    申请日：1980-03-18

    Applicant: BASF AG

    Inventor： VOLKAMER K ,  SCHNEIDER K ,  WELTZ H ,  LINDNER A ,  BROELLOS K ,  WAGNER U

    IPC: C07C1/00 ,  C07C7/08 ,  C07C11/12 ,  C07C67/00

    Abstract: A process for isolating a conjugated diolefin from a C4- or C5-hydrocarbon mixture containing the diolefin, by single-stage or multi-stage extractive distillation using a selective solvent, wherein the selective solvent is a solvent mixture which comprises (a) from 1 to 99 percent by weight of an N-alkyl-substituted lower aliphatic acid amide or of an N-alkyl-substituted alicyclic acid amide having 5 ring members and (b) from 1 to 99 percent by weight of an aliphatic or alicyclic ether boiling at from 30 DEG C. to 200 DEG C.

Patent Agency Ranking