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:
Sep. 22, 1981
Filed:
Aug. 18, 1980
Applicant:
Inventor:
Max M Boudakian, Pittsford, NY (US);
Assignee:
Olin Corporation, New Haven, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
546345 ;
Abstract
Disclosed is the improvement to the Craig process for producing 2-bromopyridine by the diazotization-bromination reaction of 2-aminopyridine with HBr in the presence of Br.sub.2 and a diazotization agent wherein the improvement is to conduct the reaction in the additional presence of H.sub.2 SO.sub.4 and to employ a molar ratio of HBr:2-aminopyridine in the range from about 1:1 to about 3.5:1 and to employ a molar ratio of H.sub.2 SO.sub.4 :HBr in the range from about 2:8 to about 8:2.