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:
Feb. 28, 1989
Filed:
Dec. 07, 1987
Applicant:
Inventors:
Yasunobu Nishimura, Kamifukuoka, JP;
Toshikazu Kawai, Kawagoe, JP;
Yoshikazu Sugimori, Kamifukuoka, JP;
Assignee:
Central Glass Company, Limited, Ube, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558314 ;
Abstract
In preparing trifluoromethylbenzonitrile by reaction of trifluoromethylbenzaldehyde with hydroxylamine, the rate of reaction is enhanced and formation of trifluoromethylbenzamide is suppressed by carrying out the reaction in an organic solvent which is immiscible with water and has a sufficiently high boiling point, e.g. nitrotoluene, and continuously distilling by-produced water from the reaction system. The solvent can easily and almost entirely be recovered and reused.