公开(公告)号：MX162490A

公开(公告)日：1991-05-13

申请号：MX19787683

申请日：1983-06-30

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAXER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/58 ,  B01J23/66 ,  B01J37/02 ,  C07D301/10 ,  C07D303/04

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：HU190487B

公开(公告)日：1986-09-29

申请号：HU145783

申请日：1983-04-28

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

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

公开(公告)号：DD232840A5

公开(公告)日：1986-02-12

申请号：DD27873485

申请日：1985-07-18

Applicant: HOECHST AG

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

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

公开(公告)号：CS326283A2

公开(公告)日：1985-06-13

申请号：CS326283

申请日：1983-05-10

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

IPC: B01J23/50 ,  C07D301/10

公开(公告)号：RO86846A2

公开(公告)日：1985-05-20

申请号：RO11091083

申请日：1983-05-09

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

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

公开(公告)号：DE3229541A1

公开(公告)日：1984-02-09

申请号：DE3229541

申请日：1982-08-07

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF

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

Abstract: A method for improving the activity of a used supported silver catalyst, used for the manufacture of ethylene oxide by reaction of ethylene with oxygen or air, which method consists essentially of: (a) impregnating said used catalyst at a temperature from 80 DEG C. to 150 DEG C. and for 0.75 hour to 10 hours with an impregnating solution containing water, a water-miscible organic solvent selected from the group consisting of methanol, ethanol, propanol, and isopropanol, at least one compound of cesium, rubidium, or of cesium and rubidium in an amount providing from 50 mg to 1000 mg per kilogram of solution, said solution containing from 5 to 50 percent by weight of water; (b) separating the impregnated catalyst from excess impregnating solution; and (c) drying the impregnated catalyst.

公开(公告)号：BR8303482A

公开(公告)日：1984-02-07

申请号：BR8303482

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 ,  C07D303/04

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：CA1152973A

公开(公告)日：1983-08-30

申请号：CA360614

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

Abstract: : HOE 79/F 919 Process for improving the activity of supported silver catalysts Supported silver catalysts, which should have as high an activity as possible, are employed for the manufacture of ethylene oxide by oxidizing ethylene by means of oxygen or air. A process is described for improving the activity of supported silver catalysts which have already been used, in which the used catalyst is first washed with an inert liquid containing ammonia and/or aliphatic amines and 1 to 1,000 parts, per 1 million parts of catalyst, of cesium, rubidium or a mixture thereof is then deposited on the washed catalyst. The deposition is generally effected with the aid of an impregnating solution containing the cesium and/or rubidium compounds in a suitable quantity. This process makes it possible to improve considerably the activity of supported silver catalysts which have already been in use for the oxidation of ethylene by means of oxygen or air.

公开(公告)号：DE2860843D1

公开(公告)日：1981-10-22

申请号：DE2860843

申请日：1978-08-28

Applicant: HOECHST AG

Inventor： REBSDAT SIEGFRIED DR ,  MAYER SIGMUND ,  ALFRANSEDER JOSEF ,  RIEDL JOSEF 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：AU3014077A

公开(公告)日：1979-05-03

申请号：AU3014077

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 ,  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.