公开(公告)号：AU6254980A

公开(公告)日：1981-04-09

申请号：AU6254980

申请日：1980-09-19

Applicant: HOECHST AG

Inventor： ALFRANSEDER JOSEF ,  MAYER SIGMUND ,  REBSDAT SIEGFRIED ,  RIEDL JOSEF ,  SCHAFFELHOFER IWO

IPC: B01J23/50 ,  B01J23/66 ,  B01J23/68 ,  B01J23/96 ,  B01J38/48 ,  B01J38/66 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04

公开(公告)号：CA1093056A

公开(公告)日：1981-01-06

申请号：CA289761

申请日：1977-10-28

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF

IPC: B01J23/66 ,  B01J23/96 ,  B01J31/40 ,  B01J38/48 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04

Abstract: HOE 76/F 923 PROCESS FOR IMPROVING THE ACTIVITY OF USED SUPPORTED SILVER CATALYSTS of the disclosure: The activity of supported silver catalysts for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air is improved by applying to the catalyst from 1 to 1,000 ppm, preferably 20 to 500 ppm, of cesium and/or rubidium in two or more than two steps and using the catalyst after each impregnation step again for the production of ethylene oxide by direct oxidation of ethylene with molecular oxygen or air.

公开(公告)号：CA1083156A

公开(公告)日：1980-08-05

申请号：CA115662

申请日：1971-06-15

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  HAHN HELMUT

IPC: C07C45/71 ,  C07C47/575 ,  C07C43/28 ,  C07C47/55 ,  C07C93/14

Abstract: There is disclosed a process for the preparation of aryl-1,1,2,2-tetrafluoroethyl ethers by reacting phenols with tetrafluoroethylene at a normal atmospheric or reduced pressure. The reaction is carried out in a water-miscible polar inert solvent in the presence of about 0.05 to about 0.5 mole of an alkali metal hydroxide per each equivalent of phenolic hydroxy group at a temperature of 50 to 150.degree.C. The process is particularly advantag-eous in that it does not require a high pressure for the reaction which is required in conventional processes.

公开(公告)号：CA1002071A

公开(公告)日：1976-12-21

申请号：CA170650

申请日：1973-05-08

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED

IPC: C07C29/136 ,  B01J23/00 ,  C07B61/00 ,  C07C27/00 ,  C07C29/149 ,  C07C31/34 ,  C07C31/38 ,  C07C53/21 ,  C07C67/00

公开(公告)号：CA905594A

公开(公告)日：1972-07-18

申请号：CA905594D

Applicant: HOECHST AG

Inventor： SCHUIERER ERIC ,  REBSDAT SIEGFRIED ,  HOFFMANN DIETER

公开(公告)号：CA847390A

公开(公告)日：1970-07-21

申请号：CA847390D

Applicant: HOECHST AG

Inventor： HAHN HELMUT ,  REBSDAT SIEGFRIED