公开(公告)号：DE2937421A1

公开(公告)日：1981-04-09

申请号：DE2937421

申请日：1979-09-15

Applicant: BASF AG

Inventor： RICHARZ WINFRIED DIPL CHEM DR ,  FROEHLICH HELMUT DIPL CHEM DR ,  SCHROEDER HARALD DIPL CHEM DR

IPC: A01N43/58 ,  A01P13/00 ,  C07D237/22 ,  C07D237/10

Abstract: The manufacture of substantially pure 4-amino-5-chloro-1-phenylpyridaz-6-one by reaction of 4,5-dichloro-1-phenylpyridaz-6-one with ammonia in the presence of phenol-4-sulfonic acid.

公开(公告)号：DE2758113A1

公开(公告)日：1979-07-05

申请号：DE2758113

申请日：1977-12-24

Applicant: BASF AG

Inventor： FROEHLICH HELMUT DIPL CHEM DR ,  SCHNEIDER MANFRED DIPL CHEM DR ,  HIMMELE WALTER DIPL CHEM DR ,  STROHMEYER MAX DIPL CHEM DR ,  SANDROCK GERHARD DIPL CHEM DR ,  BAER KARL DIPL CHEM DR

IPC: B01J23/12 ,  C07C45/48 ,  C07C49/06 ,  B01J21/06 ,  C07C45/18 ,  C07C49/76

Abstract: Prodn. of ketones of formula R1COR2 (I) (where R1 is 1-17C alkyl or 7-12C aralkyl; R2 is as R1 or 5-8C cycloalkyl or aryl) comprises gas-phase decarboxylation under dehydrating conditions of R1COOH or its mixt. with R5COOH. Reaction is carried out over a new catalyst contg. 5-30 wt. % ZrO2 and/or ThO2 with the balance being anatase. (I) are useful as solvents and intermediates for dyes, plant protection agents and pharmaceuticals.