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:
Nov. 09, 1976
Filed:
Sep. 19, 1975
Shinzo Imamura, Nagoya, JA;
Ichiro Kawamoto, Nagoya, JA;
Koji Natsume, Toyoake, JA;
Shinnosuke Sakai, Nagoya, JA;
Toray Industries, Inc., Tokyo, JA;
Abstract
There is provided an improvement in the process for the amination of bis(2-chloro-1-nitrosocyclohexane) wherein bis(2-chloro-1-nitrosocyclohexane) prepared by reacting cyclohexene with nitrosyl chloride in the presence of liquid sulfur dioxide is treated with ammonia. Sulfur dioxide contained in the nitrosation reaction mixture in the form of a slurry or solution containing bis(2-chloro-1-nitrosocyclohexane) is evaporated in the presence of an inert organic solvent, incorporated into the reaction mixture, and is substantially removed from the reaction mixture. Thereafter, the slurry or solution of bis(2-chloro-1-nitrosocyclohexane) in the inert organic solvent thus prepared is treated with ammonia.