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    Bis-(4-hydroxy:phenyl)-sulphone prodn.
    3.
    发明专利
    Bis-(4-hydroxy:phenyl)-sulphone prodn. 未知

    公开(公告)号：DE3924395A1

    公开(公告)日：1991-01-31

    申请号：DE3924395

    申请日：1989-07-24

    Applicant: BASF AG

    Inventor： HUPFELD BERND DR ,  STUMPP MICHAEL DR ,  REICHELT HELMUT DR

    IPC: C07C315/00 ,  C07C317/22

    Abstract: Bis-(4-hydroxyphenyl)-sulphone (I) is prepd. by reacting phenol with sulphuric acid in a mol. ratio of 1:1 to 25:1 at 140-230 deg.C in the absence of an inert solvent. Pref. the reaction is carried out at 160-200 deg.C and a pres. of 0.5-1.5 bar, using a mol. ratio phenol: H2SO4 of 2.1:1 to 25:1 and pref. in the presence of a sulphonation catalyst, eg. a Lewis acid such as boric acid or trifluoromethanesulphonic acid. Pref. the reaction is carried out in excess phenol in the absence of inert solvent and the excess phenol is removed by distn. during or after the initial stage, during or after the intermediate reaction-progressing stage, or after reaction is essentially complete.

    5.
    发明专利
    未知

    公开(公告)号：DE3835527A1

    公开(公告)日：1990-05-03

    申请号：DE3835527

    申请日：1988-10-19

    Applicant: BASF AG

    Inventor： STUMPP MICHAEL DR ,  NEUMANN PETER DR ,  RUEHENBECK WOLFGANG DR ,  BERGNER MICHAEL

    IPC: B01J27/02 ,  C07B61/00 ,  C07C315/00 ,  C07C315/06 ,  C07C317/22

    Abstract: Process for the preparation of bis(4-hydroxyphenyl) sulphone by reaction of phenol with sulphuric acid in the presence of a solvent at a temperature of 130 to 220 DEG C and, where appropriate, in the presence of a sulphonation auxiliary, the bis(4-hydroxyphenyl) sulphone which is formed being deposited during or after the reaction selectively on a nucleus-forming surface, and being removed from the reaction medium.

    7.
    发明专利
    未知

    公开(公告)号：DE3704931A1

    公开(公告)日：1988-08-25

    申请号：DE3704931

    申请日：1987-02-17

    Applicant: BASF AG

    Inventor： SCHAEFER GERHARD DR ,  EILINGSFELD HEINZ DR ,  NEUMANN PETER DR ,  STUMPP MICHAEL DR

    IPC: C07C315/06 ,  C07C317/14 ,  C07C147/06

    Abstract: A process for the isolation of 4,4'-dichlorodiphenyl sulfone from a mixture of dichlorodiphenyl sulfones in which the ratios of the masses of 2,4'-dichlorodiphenyl sulfone and 3,4'-dichlorodiphenyl sulfone to the mass of 4,4'-dichlorodiphenyl sulfone are respectively from 0.5% to 20% and from 0.5% to 30% by treating the mixture with an alkanol at temperatures of from 20 DEG C. to 250 DEG C., cooling, and separating the pure 4,4'-dichlorodiphenyl sulfone that precipitates.

    10.
    发明专利
    未知

    公开(公告)号：DE3860116D1

    公开(公告)日：1990-06-07

    申请号：DE3860116

    申请日：1988-02-13

    Applicant: BASF AG

    Inventor： SCHAEFER GERHARD DR ,  EILINGSFELD HEINZ DR ,  NEUMANN PETER DR ,  STUMPP MICHAEL DR

    IPC: C07C315/06 ,  C07C317/14

    Abstract: A process for the isolation of 4,4'-dichlorodiphenyl sulfone from a mixture of dichlorodiphenyl sulfones in which the ratios of the masses of 2,4'-dichlorodiphenyl sulfone and 3,4'-dichlorodiphenyl sulfone to the mass of 4,4'-dichlorodiphenyl sulfone are respectively from 0.5% to 20% and from 0.5% to 30% by treating the mixture with an alkanol at temperatures of from 20 DEG C. to 250 DEG C., cooling, and separating the pure 4,4'-dichlorodiphenyl sulfone that precipitates.

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