公开(公告)号：DE2740480A1

公开(公告)日：1979-03-22

申请号：DE2740480

申请日：1977-09-08

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DIPL CHEM DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF DIPL CHEM DR

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

Abstract: The activity of supported silver catalysts, which have been used for the direct oxidation of ethylene to ethylene oxide with molecular oxygen or air and to which from 1 to 1,000 parts, per 1 million parts of catalyst, of cesium and/or rubidium have been applied, is improved by washing the catalyst with an inert liquid prior to the application of cesium and/or rubidium.

公开(公告)号：DD131841A5

公开(公告)日：1978-07-26

申请号：DD20055477

申请日：1977-08-12

Applicant: HOECHST AG

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

IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/50 ,  C07B61/00 ,  C07D301/10 ,  B01J23/50 ,  B01J23/58

Abstract: The activity of supported silver catalysts used up in the direct oxidation of ethylene with molecular oxygen or air is improved by impregnating the catalyst arranged in a fixed bed with a solution of a caesium and/or rubidium compound in an inert organic solvent, optionally together with up to 40% by weight of water, calculated on the total liquid, as dissolving intermediary, so as to produce a concentration gradient of from 0.3 to 20 parts of caesium and/or rubidium per 1 million parts of catalyst and per meter of fixed bed, counter to the direction of flow of the gas to be reacted. In this manner the activity of the catalyst is considerably improved which results in an increased selectivity of the oxidation of ethylene to ethylene oxide.

公开(公告)号：DE2519599C2

公开(公告)日：1977-02-17

申请号：DE2519599

申请日：1975-05-02

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIEGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/50 ,  B01J23/96 ,  C07D301/10

公开(公告)号：MX168129B

公开(公告)日：1993-05-04

申请号：MX20605785

申请日：1985-07-19

Applicant: HOECHST AG

Inventor： KAULICH HERBERT ,  SCHAFFELHOFER IWO ,  REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10

公开(公告)号：MX163409B

公开(公告)日：1992-05-11

申请号：MX19780883

申请日：1983-06-27

Applicant: HOECHST AG

Inventor： MAYER SIEGFRIED REBSDAT SIGMUN ,  ALFRANSEDER JOSEF

IPC: B01J23/54 ,  B01J23/66 ,  C07D301/10 ,  B01J23/50

公开(公告)号：AU573867B2

公开(公告)日：1988-06-23

申请号：AU4519785

申请日：1985-07-19

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  SCHAFFELHOFER IWO ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  KAULICH HERBERT

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10

公开(公告)号：AU558160B2

公开(公告)日：1987-01-22

申请号：AU1639283

申请日：1983-06-29

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/58 ,  B01J23/66 ,  B01J37/02 ,  C07D301/10 ,  B01J23/02

Abstract: Silver catalysts, useful for the oxidation of ethylene to ethylene oxide, contain 3-20 percent by weight of silver and 0.003-0.05 percent by weight of potassium, rubidium, cesium, or a mixture thereof as a promoter present on a heat-resistant porous support to which they have been applied by several impregnating steps.

公开(公告)号：AU553192B2

公开(公告)日：1986-07-03

申请号：AU1525483

申请日：1983-05-31

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/54 ,  B01J23/66 ,  C07D301/10 ,  B01J23/02 ,  B01J37/08

公开(公告)号：CS240968B2

公开(公告)日：1986-03-13

申请号：CS326283

申请日：1983-05-10

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/50 ,  C07D301/10

公开(公告)号：DE3426699A1

公开(公告)日：1986-01-23

申请号：DE3426699

申请日：1984-07-20

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  KAULICH HERBERT ,  SCHAFFELHOFER IWO DR

IPC: C07D303/04 ,  B01J23/66 ,  B01J37/02 ,  C07B61/00 ,  C07D301/10