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:
Jan. 04, 1983
Filed:
Oct. 10, 1980
R Simon-Bierenbaum, Buffalo, NY (US);
David Y Tang, Tonawanda, NY (US);
Occidental Chemical Corporation, Niagara Falls, NY (US);
Abstract
Novel meta- and para-trifluoromethyl benzal chlorides and ring-halogenated derivatives are useful chemical intermediates for the preparation of meta- and para-trifluoromethyl benzaldehydes and various other useful end products. The novel compounds can be prepared from readily-available xylene starting materials in a process comprising (a) chlorinating meta- or para-xylene, or a ring -halogenated meta- or para-xylene, to form a trichloromethyl benzal chloride product and (B) reacting the trichloromethyl benzal chloride product with about 3 moles or less of anhydrous hydrogen fluoride in the presence of a halogen exchange catalyst.