中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.02 seconds)

    PROCESS FOR PRODUCING 1,4-BIS-(FLUORBENZOYL)-BENZOL
    2.
    发明专利
    PROCESS FOR PRODUCING 1,4-BIS-(FLUORBENZOYL)-BENZOL 未知

    公开(公告)号：AU7865691A

    公开(公告)日：1991-12-31

    申请号：AU7865691

    申请日：1991-05-18

    Applicant: HOECHST AG

    Inventor： GILB WALTER ,  GROTSCH GEORG ,  SCHUBERT HANS

    IPC: B01J27/08 ,  C07B61/00 ,  C07C45/46 ,  C07C49/813

    Abstract: PCT No. PCT/EP91/00929 Sec. 371 Date Nov. 25, 1992 Sec. 102(e) Date Nov. 25, 1992 PCT Filed May 18, 1991 PCT Pub. No. WO92/18862 PCT Pub. Date Dec. 12, 1991.Process for producing 1,4-bis-(4-fluorbenzoyl)-benzol by reacting terephthaloyl chloride with fluorbenzol in the presence of aluminium chloride or aluminium bromide, characterized in that aluminium chloride or aluminium bromide is added in metered quantities to a mixture of terephthaloyl chloride and fluorbenzol at temperatures of approximately 25 degrees C. to approximately 68 degrees C. and the mixture is allowed to react at said temperatures.

    PROCESS FOR THE PREPARATION OF 3,4'-DICHLORODIPHENYL ETHER
    4.
    发明专利
    PROCESS FOR THE PREPARATION OF 3,4'-DICHLORODIPHENYL ETHER 未知

    公开(公告)号：CA2031444A1

    公开(公告)日：1991-06-06

    申请号：CA2031444

    申请日：1990-12-04

    Applicant: HOECHST AG

    Inventor： PAPENFUHS THEODOR ,  SCHUBERT HANS ,  HESS REINER

    IPC: B01J27/232 ,  C07B61/00 ,  C07C41/01 ,  C07C41/16 ,  C07C43/16 ,  C07C43/29 ,  C07C41/06

    Abstract: HOE 89/F 383 Process for the preparation of 3,4'-dichlorodiphenyl ether A process for the preparation of 3,4'-dichlorodiphenyl ether from 1,3-dichlorobenzene and 4-chlorophenol, which comprises mixing 1 mol of 4-chlorophenol with about 2 to about 6 mol of initially introduced 1,3-dichlorobenzene and about 1 to about 3 mol of potassium carbonate in about 1 to about 5 mol of a dipolar aprotic solubilizer which boils above l60.degree.C, at temperatures of about 160.degree.C to about 190.degree.C with stirring, then adding about 0.0l to about 1 mol-% of basic copper carbonate of the formula Cu(OH)2?CuCO3?0.5 H2O and heating with stirring to about 170 to about 173.degree.C while removing the water formed by distillation, then optionally adding further 4-chloxo-phenol with the proviso that from the start the amount of 1,3-dichlorobenzene present in terms of moles is always 1 to 3 mol greater than the totally added amount of 4-chlorophenol and, if desired, additionally adding basic copper carbonate of the formula mentioned if at the start less than 0.1 mol-% had been added, additionally stirring within the last-mentioned temperature range and finally working up after allowing to cool.

    5.
    发明专利
    未知

    公开(公告)号：MX156075A

    公开(公告)日：1988-06-28

    申请号：MX19195482

    申请日：1982-03-24

    Applicant: HOECHST AG

    Inventor： SCHUBERT HANS ,  BAESSLER KONRAD

    IPC: C07C67/00 ,  C07C209/00 ,  C07C211/50 ,  C07C209/10 ,  C07C211/42 ,  C07C211/51 ,  C07C87/50 ,  C07C85/26

    Abstract: Crude 3,4,3',4'-tetraaminodiphenyl (TAD) prepared by ammonolysis of 3,3'-dichlorobenzidine in the presence of mainly Cu catalysts is purified by a process in which (a) after its isolation from the preparation process crude TAD is treated with an aqueous NH3 solution and, if desired, TAD thus treated is then (b) dissolved and reprecipitated in water in the presence of adsorbents and also of a water-soluble reducing agent. Compared with relevant processes of the state of the art, the process produces a higher yield of pure TAD and it is also simpler to carry out.

    7.
    发明专利
    未知

    公开(公告)号：BR9106498A

    公开(公告)日：1993-05-25

    申请号：BR9106498

    申请日：1991-05-18

    Applicant: HOECHST AG

    Inventor： GILB WALTER ,  GROETSCH GEORG ,  SCHUBERT HANS

    IPC: B01J27/08 ,  C07B61/00 ,  C07C45/46 ,  C07C49/813

    Abstract: PCT No. PCT/EP91/00929 Sec. 371 Date Nov. 25, 1992 Sec. 102(e) Date Nov. 25, 1992 PCT Filed May 18, 1991 PCT Pub. No. WO92/18862 PCT Pub. Date Dec. 12, 1991.Process for producing 1,4-bis-(4-fluorbenzoyl)-benzol by reacting terephthaloyl chloride with fluorbenzol in the presence of aluminium chloride or aluminium bromide, characterized in that aluminium chloride or aluminium bromide is added in metered quantities to a mixture of terephthaloyl chloride and fluorbenzol at temperatures of approximately 25 degrees C. to approximately 68 degrees C. and the mixture is allowed to react at said temperatures.

Patent Agency Ranking