公开(公告)号：SE7604950L

公开(公告)日：1976-11-03

申请号：SE7604950

申请日：1976-04-29

Applicant: HOECHST AG

Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J

IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/52 ,  C07B61/00 ,  C07D301/10

Abstract: The efficiency of silver carrier catalysts having reduced activity for the manufacture of ethylene oxide by reacting ethylene with oxygen or air is improved by impregnating the used catalyst with a solution containing cesium and/or rubidium compounds, an aliphatic alcohol and at most 10% by weight of water. After impregnation the alcohol and optionally the water are evaporated. The cesium and/or rubidium content of the impregnating solution and the number of impregnations are adjusted to obtain on the carrier a cesium and/or rubidium concentration of from 1 to 1,000 ppm.

公开(公告)号：SE435139B

公开(公告)日：1984-09-10

申请号：SE7709149

申请日：1977-08-12

Applicant: HOECHST AG

Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

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

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：SE415530B

公开(公告)日：1980-10-13

申请号：SE7604950

申请日：1976-04-29

Applicant: HOECHST AG

Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J

IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/52 ,  C07B61/00 ,  C07D301/10

Abstract: The efficiency of silver carrier catalysts having reduced activity for the manufacture of ethylene oxide by reacting ethylene with oxygen or air is improved by impregnating the used catalyst with a solution containing cesium and/or rubidium compounds, an aliphatic alcohol and at most 10% by weight of water. After impregnation the alcohol and optionally the water are evaporated. The cesium and/or rubidium content of the impregnating solution and the number of impregnations are adjusted to obtain on the carrier a cesium and/or rubidium concentration of from 1 to 1,000 ppm.

公开(公告)号：AU510768B2

公开(公告)日：1980-07-10

申请号：AU3014077

申请日：1977-10-28

Applicant: HOECHST AG

Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J ,  RIEDL J

IPC: B01J23/66 ,  B01J23/96 ,  B01J31/40 ,  B01J38/48 ,  C07B61/00 ,  C07D301/10 ,  C07D303/04 ,  B01J23/50

Abstract: 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：ZA762463B

公开(公告)日：1977-04-27

申请号：ZA762463

申请日：1976-04-26

Applicant: HOECHST AG

Inventor： MAYER S ,  ALFRANSEDER J ,  REBSDAT S

IPC: B01J23/50 ,  B01J23/96 ,  C07D301/10 ,  B01J ,  C07D

公开(公告)号：ZA7602463B

公开(公告)日：1977-04-27

申请号：ZA7602463

申请日：1976-04-26

Applicant: HOECHST AG

Inventor： MAYER S ,  ALFRANSEDER J ,  REBSDAT S

IPC: B01J23/50 ,  B01J23/96 ,  C07D301/10 ,  B01J ,  C07D

CPC classification number: B01J38/485 ,  B01J23/96 ,  C07D301/10 ,  Y02P20/584

公开(公告)号：NO761498L

公开(公告)日：1976-11-03

申请号：NO761498

申请日：1976-04-30

Applicant: HOECHST AG

Inventor： REBSDAT S ,  MAYER S ,  ALFRANSEDER J

IPC: B01J23/66 ,  B01J23/96 ,  B01J38/48 ,  B01J38/52 ,  C07B61/00 ,  C07D301/10 ,  B01J

Abstract: The efficiency of silver carrier catalysts having reduced activity for the manufacture of ethylene oxide by reacting ethylene with oxygen or air is improved by impregnating the used catalyst with a solution containing cesium and/or rubidium compounds, an aliphatic alcohol and at most 10% by weight of water. After impregnation the alcohol and optionally the water are evaporated. The cesium and/or rubidium content of the impregnating solution and the number of impregnations are adjusted to obtain on the carrier a cesium and/or rubidium concentration of from 1 to 1,000 ppm.