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    1.
    发明专利
    未知

    公开(公告)号：DE59300575D1

    公开(公告)日：1995-10-19

    申请号：DE59300575

    申请日：1993-03-27

    Applicant: BASF AG

    Inventor： KIEFER HANS DR ,  HUPFER LEOPOLD DR ,  LIPPERT FERDINAND DR

    IPC: C07C51/02 ,  C07C53/02

    Abstract: A process for preparing formic acid by thermal cleavage of quaternary ammonium formates of the general formula I (* CHEMICAL STRUCTURE *) (I) where R1, R2 and R3 are C1- to C14-alkyl, C3- to C8-cycloalkyl, aryl or C7- to C16-aralkyl, or together are 1,4- or 1,5-alkylene which is unsubstituted or substituted one to four times by C1-to C4-alkyl, with the proviso that the sum of the carbon atoms of R1, R2 and R3 in the quaternary ammonium formates I is 7 to 40, comprises carrying out the cleavage in the presence of secondary formamides of the general formula II (* CHEMICAL STRUCTURE *) (II) where R4 and R5 are C2- to C10-alkyl, C3- to C8-cycloalkyl, aryl or C7- to C16-aralkyl, or together are 1,4- or 1,5-alkylene which is unsubstituted or substituted one to four times by C1- to C4-alkyl, which formamides boil 30 degrees to 150 degrees C. lower than the tertiary amine of the general formula III (* CHEMICAL STRUCTURE *) (III) where R1, R2 and R3 have the abovementioned meanings, contained in the formate I.

    3.
    发明专利
    未知

    公开(公告)号：DE59001082D1

    公开(公告)日：1993-05-06

    申请号：DE59001082

    申请日：1990-01-03

    Applicant: BASF AG

    Inventor： STEINIGER MICHAEL DR ,  VOSS HARTWIG DR ,  HUPFER LEOPOLD DR

    IPC: B01D61/24 ,  B01D61/44 ,  C07C45/00 ,  C07C45/28 ,  C07C45/78 ,  C07C45/80 ,  C07C47/127

    Abstract: Method of purification of aqueous glyoxal solutions which contain organic acids by means of a membrane cell consisting of at least two chambers, in which the glyoxal solution is passed through at least one of the chambers of the cells, which is separated from the adjacent chamber(s) by an anion exchanger cell and where the aqueous solution of a base is passed through at least one of the adjacent chambers.

    4.
    发明专利
    未知

    公开(公告)号：DE3783695D1

    公开(公告)日：1993-03-04

    申请号：DE3783695

    申请日：1987-09-19

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  SCHNEIDER KURT DR ,  HUPFER LEOPOLD DR

    IPC: B01J29/04 ,  B01J29/40 ,  B01J29/85 ,  C07C45/65 ,  C07C45/66 ,  C07C45/67 ,  C07C49/203

    Abstract: Prodn. of unsatd. ketones of formula (I) comprises reacting hydroxyketone derivs. (II) over acid catalyst. R1, R2, and R3 = up to 12C alkyl or alkenyl, cycloalkyl, aryl, aralkyl or alkaryl (all opt. substd.) or R1/R2 or R2/R3 together complete cycloalkane or cycloalkene; R4 = H, alkyl or carboxy gp. The catalyst is pref. a zeolite; a phosphate; oxides of Al, B, Ti, Zr and/or Si; or H3PO4 or boric acid supported on pumice, SiO2 or Al2O3.

    5.
    发明专利
    未知

    公开(公告)号：DE3866440D1

    公开(公告)日：1992-01-09

    申请号：DE3866440

    申请日：1988-06-16

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  HUPFER LEOPOLD DR ,  SCHNEIDER KURT DR

    IPC: C07C45/59 ,  C07C49/04 ,  C07C49/11 ,  C07C49/203 ,  C07C49/21

    Abstract: Prodn. of ketones of formula R1R2C=CR3-CO-Me (I) or R1R2CH-CHR3-CO-Me (II) from 4-substd. 5-methylene-1,3 -dioxolan-2-one of formula (III) is effected by contacting (III) with a catalyst comprising a zeolite, a zeolite-type phosphate and/or a B, Ce, Fe, Zr or Sr phosphate: R1-R3 = H or opt. substd. 1-12C alkyl, cycloalkyl, aryl, aralkyl or alkaryl, or R1+R3 or R2+R3 completes a cycloalkane ring. For prodn. of (II), the catalyst also contains a hydrogenation component and the reaction is effected in the presence of H2.

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