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:
Apr. 16, 1985
Filed:
Feb. 04, 1983
Applicant:
Inventor:
Kju H Shin, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544277 ;
Abstract
In the preparation of adenine from hydrogen cyanide, formamide, an ammonium salt, and methyldisulfide, the formation of a polymer by-product is reduced by heating a reaction mixture comprising the formamide and ammonium salt in a closed vessel to a reaction temperature of about 50.degree.-180.degree. C., adding the hydrogen cyanide to the preheated mixture over a period of about 1-5 hours, and maintaining the reaction temperature until the reaction is complete.