The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1993
Filed:
Sep. 10, 1991
Peter Ksoll, Dossenheim, DE;
Wolfgang Reuther, Heidelberg, DE;
Andreas Hohmann, Ludwigshafen, DE;
Peter Wittmer, Neustadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing carbonyl chlorides of the formula I ##STR1## where R is C.sub.1 -C.sub.30 -alkyl, C.sub.2 -C.sub.30 -alkenyl or C.sub.2 -C.sub.30 -alkynyl, from essentially equimolar amounts of a carboxylic acid of the formula II ##STR2## where R has the abovementioned meanings, and phosgene COCl.sub.2 (III), in the presence of a catalytic adduct of phosgene and N,N-disubstituted formamide or the hydrochlorides thereof, of the formula IV where R.sup.1 and R.sup.2 are each, independently of one another, C.sub.1 -C.sub.3 -alkyl or together are a C.sub.4 -C.sub.5 -alkylene chain which may be interrupted by oxygen or by nitrogen which carries C.sub.1 -C.sub.3 -alkyl or CHO, and n is 0, 1 or 2, wherein the reaction is carried out with a stationary phase of the catalytic adduct, is described.