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:
May. 07, 1996
Filed:
Feb. 18, 1994
Applicant:
Inventors:
Assignee:
Enichem Synthesis S.p.A., Palermo, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2041576 ; 20415765 ; 20415794 ; 20415799 ; 2041581 ;
Abstract
An alkyl-aromatic compound is selectively photochlorinated in the side chain in a cyclic reaction system wherein said compound is continuously circulated between a container and photochlorination reactor. The compound is partially chlorinated after each passage through the photochlorination reactor, the number of passages depending on the degree of chlorination required. The procedure is particularly useful for the preparation of benzyl chloride, benzal chloride and benzotrichloride, and the corresponding halogen-substituted derivatives of the nucleus.