Method of producing-coarse crystalline nicotinic acid with a high degree of purity
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 25, 1990
Issued Date -
N/A
app pub date -
Feb 28, 1989
filing date -
Apr 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is directed to a method of producing coarse-crystalline nicotinic acid with a high degree of purity in which 3-cyanopyridine is saponified with aqueous alkali hydroxide and the nicotinic acid is allowed to crystallize out of the alkali nicotinate solution obtained in this manner under the addition of mineral acid at temperatures between 99.degree. and 135.degree. C. The pH is kept above 3.7.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully