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. 06, 1988
Filed:
Aug. 30, 1984
Applicant:
Inventors:
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570144 ; 570191 ; 570208 ; 570210 ; 261151 ;
Abstract
A process for the preparation of 3,4-dichlorobenzotrihalides of the formula I ##STR1## where X is fluorine or chlorine, by reacting the corresponding 4-monochlorobenzotrihalides with chlorine gas in the presence of a catalytic amount of a Lewis acid, wherein the reaction mixture is recycled by means of a pump in a circulatory apparatus with static mixers and the amount of chlorine equivalent to the conversion of the corresponding 4-monochlorobenzotrihalide is introduced at 20.degree.-120.degree. C.