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. 16, 1993
Filed:
Oct. 11, 1990
Applicant:
Inventors:
Barry A Cullen, Lyndeboro, NH (US);
Brian A Parker, Nashua, NH (US);
Assignee:
W. R. Grace & Co.-Conn., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
558455 ; 558346 ;
Abstract
A process for producing iminodiacetonitrile (IDAN) from glycolonitrile and ammonia or its salt is disclosed. In the batch process, pH is controlled with the addition of ammonia or suitable acids. In the continuous process, glycolonitrile and ammonia are reacted in near stoichiometric amounts at a temperature from about 90.degree. C. to about 180.degree. C.