公开(公告)号：DE2819595A1

公开(公告)日：1978-12-07

申请号：DE2819595

申请日：1978-05-05

Applicant: BASF AG

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

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

公开(公告)号：DE3863165D1

公开(公告)日：1991-07-11

申请号：DE3863165

申请日：1988-10-27

Applicant: BASF AG

Inventor： MROSS WOLF-DIETER DR ,  DREWS RONALD DR ,  SCHEIDSTEGER OLAF DR ,  NETH NORBERT DR

IPC: B01J35/04 ,  F01N3/28

公开(公告)号：DE2751767A1

公开(公告)日：1979-05-23

申请号：DE2751767

申请日：1977-11-19

Applicant: BASF AG

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

IPC: B01J23/66 ,  C07D301/10 ,  C07D303/04

Abstract: A catalyst for ethylene oxide prodn. is prepd. by gas-phase reaction of ethylene with O2. The catalyst comprises a support, 2-12% Ag, and (based on Ag) 0.05-0.35 atom % K, 0.003-0.25 atom % Rb, 0.0005-0.2 atom % Cs or an equiv. amt. of a mixt. of these alkali metals. The process comprises impregnating the Ag-contg. support (opt. also contg. Na and/or Li) with a soln. (pref. alcoholic) contg. a cpd. of K, Rb and/or Cs and an amine and/or ammonia. The presence of an amine and/or ammonia in the impregnation soln. improves the selectively of the catalyst. The process is applicable to fresh catalysts rather than used or thermally stabilised catalysts.