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. 07, 1989
Filed:
Dec. 07, 1987
Applicant:
Inventor:
Walter Mesch, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548335 ;
Abstract
A process for the preparation of 4-methyl-imidazole by the reaction of hydroxypropanone and formamide, in which the reaction is carried out in the presence of at least twice the molar amount of ammonia, based on hydroxypropanone, in the liquid phase at temperatures of from 100.degree. to 200.degree. C. and pressures of from 10 to 250 bar.