公开(公告)号：DE2820520A1

公开(公告)日：1979-11-15

申请号：DE2820520

申请日：1978-05-11

Applicant: BASF AG

Inventor： MROSS WOLF DIETER DIPL CHEM DR ,  TITZENTHALER ECKART DIPL CHEM ,  KOOPMANN JUERGEN DIPL CHEM DR ,  VOGT VOLKER DIPL CHEM DR ,  SCHWARZMANN MATTHIAS DIPL CHEM

IPC: B01J23/66 ,  C07D301/10

Abstract: Prepn. of a catalyst for preparing ethylene oxide by gas-phase C2H4 oxidn. with O2 contg. 2-12% elemental silver and alkali metals (including K, Rb and/or Cs) on a support (pref. Al2O3) comprises post-treating the reduced Ag-and opt. Na- and/or Li-contg. catalyst with a soln. (pref. alcoholic) of a K, Rb and/or Cs cpd. Soln. quantity used is such that the soln. absorbed by catalyst corresponds to a quantity of 0.05-0.35 atom% K, 0.003-0.25 atom % Rb and/or 0.005-0.2 atmo % Cs, based on Ag, if necessary considering alkali metal quantities already present on catalyst. The improvement comprises using a post-treatment soln. which contains an organic cpd. (I) which forms complex salts with Ag (I)-ions via an O- and/or N atom. Use of (I) improves catalyst selectivity and activity.

公开(公告)号：DE2904919A1

公开(公告)日：1980-08-21

申请号：DE2904919

申请日：1979-02-09

Applicant: BASF AG

Inventor： MROSS WOLF DIETER DIPL CHEM DR ,  TITZENTHALER ECKART DIPL CHEM ,  KOOPMANN JUERGEN DIPL CHEM DR ,  VOGT VOLKER DIPL CHEM DR ,  SCHWARZMANN MATTHIAS DIPL CHEM

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

Abstract: Supported catalysts containing silver and alkali metals, for the preparation of ethylene oxide from ethylene and oxygen in the gas phase, are prepared or regenerated by modifying, respectively, a new or spent supported catalyst which already contains metallic silver and may or may not contain the light alkali metals lithium and/or sodium and, where a spent catalyst is concerned, also contains the heavy alkali metals potassium, rubidium and/or cesium, with a solution containing the heavy alkali metals, the modifier solution used containing (a) a surfactant and/or a reducing agent, in the case of the preparation of a new catalyst or (b) a surfactant, in the case of the regeneration of a spent catalyst.

公开(公告)号：DE2933950A1

公开(公告)日：1981-03-12

申请号：DE2933950

申请日：1979-08-22

Applicant: BASF AG

Inventor： MROSS WOLF DIETER DIPL CHEM DR ,  TITZENTHALER ECKART DIPL CHEM ,  KOOPMANN JUERGEN DIPL CHEM DR ,  VOGT VOLKER DIPL CHEM DR ,  SCHWARZMANN MATTHIAS DIPL CHEM

IPC: B01J23/66 ,  B01J37/06 ,  C07D301/10 ,  B01J23/50

Abstract: Alpha-Al2O3-supported Ag catalysts for ethylene oxide prepn., from C2H4 and O2, contain less than 0.001 wt.% alkali-soluble Si cpds. (I), calculated as SiO2 and w.r.t. total catalyst wt. Long catalyst life can be achieved without loss in activity and selectivity.

公开(公告)号：DE2404773A1

公开(公告)日：1975-08-21

申请号：DE2404773

申请日：1974-02-01

Applicant: BASF AG

Inventor： FUCHS WERNER DIPL CHEM DR ,  PLATZ ROLF DIPL CHEM DR ,  VOGT VOLKER DIPL CHEM DR

IPC: C07C265/00 ,  C07C20060101 ,  C07C67/00 ,  C07C241/00 ,  C07C263/10 ,  C07C119/042