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. 02, 1979
Filed:
Nov. 14, 1977
Earl P Moore, Jr, Hockessin, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Process for removing water from a solution of water in 2-amino-2,4-dimethyl-4-methoxy pentanenitrile comprising treating said pentanenitrile solution with sufficient ammonia to form an ammonia concentration in the ammonia-water composition of at least 18% by weight at from 0.degree. to 50.degree. C, to cause an aqueous layer and a pentanenitrile layer to form, separating the pentanenitrile layer and the aqueous layer and then optionally removing ammonia from the pentanenitrile layer and optionally reacting the pentanenitrile with substantially no ammonia in the presence of a metal hypochlorite and a surfactant to prepare 2,2'-azobis(2,4-dimethyl-4-methoxy pentanenitrile).