Method of obtaining nicotinic acid
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United States of America Patent
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Mar 17, 1998
Grant Date -
N/A
app pub date -
Jul 17, 1996
filing date -
Jan 26, 1994
priority date (Note) -
Expired
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Abstract
A method has been developed for preparing nicotinic acid with a yield of 82-86% mol, in which method there is no formation of harmful gas wastes and liquid wastes. The process is carried out by gas-phase single-step oxidation of .beta.-picoline with oxygen in the presence of water vapor and a catalyst on the base of oxides of vanadium and titanium, with or without additives, at a temperature of 250.degree.-290.degree. C. and mole ratios O.sub.2 :.beta.-picoline=15-40 and H.sub.2 O:.beta.-picoline=10-70.
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