Process for the preparation of nicotinic acid

Details Process for the preparation of nicotinic acid Process for the preparation of nicotinic acid

1998-11-23

2000-06-20

Fan, Jane

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

546320, C07D21330

Patent

active

060779578

ABSTRACT:
Nicotinic acid is produced from aqueous solutions of ammonium nicotinate by spray-drying. The nicotinic acid can be freed from residual ammonium nicotinate by a thermal post-treatment in a fluidized bed or under reduced pressure. The process is suitable in particular for the work-up of the reaction mixture produced in the oxidation of 3-methylpyridine with atmospheric oxygen, with the ammonia and, if appropriate, the water, being able to be recycled. Nicotinic acid ("vitamin PP") is an important additive to foodstuffs and feedstuffs.

REFERENCES:
patent: 3929811 (1975-12-01), Gelbein et al.
Chemcial Abstracts, vol. 123, No. 24 (317458), Dec. 11, 1995 (Abstract No. 317458).
Chemical Abstracts, vol. 86, No. 19 (139772), May 9, 1977 (Abstract No. 139772).
Chemical Abstracts, vol. 86, No. 17 (121171), Apr. 25, 1977 (Abstract No. 121171).

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