EP 1210310 A1 20020605 - METHOD FOR PREPARING ACID CHLORIDES AND BENZENE ALDEHYDES
Title (en)
METHOD FOR PREPARING ACID CHLORIDES AND BENZENE ALDEHYDES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON CARBONSÄURECHLORIDEN UND BENZOLALDEHYDEN
Title (fr)
PROCEDE DE PREPARATION DE CHLORURES D'ACIDES ET D'ALDEHYDES BENZENIQUES
Publication
Application
Priority
- FR 0002467 W 20000907
- FR 9911354 A 19990910
Abstract (en)
[origin: FR2798380A1] The invention concerns a semi-continuous method for preparing acid chlorides and benzene aldehydes which consists in: producing in a reactor a starter comprising for the major part a dichloromethylated benzene compound; simultaneously and continuously introducing simultaneously in the reactor, a carboxylic acid or its anhydride, a dichloromethylated benzene compound (2) and at least a Friedel-Crafts catalyst; and in causing them to react, under stirring, under a pressure P1 not higher than atmospheric pressure and at a temperature ranging between 60 DEG C and 180 DEG C; continuously extracting chloride acid (3) from the reaction medium and optionally formed HCI, by distillation under pressure P1 and at reaction temperature, then in ceasing to introduce reagents when the working volume of the reactor containing for the major part benzene aldehyde is reached; and in performing total or partial fractionated distillation of the reaction medium, consisting for the major part of benzene aldehyde, under pressure P2 < P1 and at a temperature not higher than 180 DEG C.
IPC 1-7
IPC 8 full level
C07C 27/00 (2006.01); C07B 61/00 (2006.01); C07C 45/43 (2006.01); C07C 45/46 (2006.01); C07C 47/54 (2006.01); C07C 51/60 (2006.01); C07C 53/42 (2006.01); C07C 53/50 (2006.01)
CPC (source: EP KR)
C07C 45/43 (2013.01 - EP); C07C 51/60 (2013.01 - KR)
Citation (search report)
See references of WO 0119766A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
FR 2798380 A1 20010316; FR 2798380 B1 20011026; AU 7299700 A 20010417; BR 0013925 A 20020514; EP 1210310 A1 20020605; JP 2003509391 A 20030311; KR 20020041428 A 20020601; WO 0119766 A1 20010322
DOCDB simple family (application)
FR 9911354 A 19990910; AU 7299700 A 20000907; BR 0013925 A 20000907; EP 00960819 A 20000907; FR 0002467 W 20000907; JP 2001523347 A 20000907; KR 20027003121 A 20020308