Process for preparing nicotinic acid

Details Process for preparing nicotinic acid Process for preparing nicotinic acid

C - Chemistry, Metallurgy

07

D

C07D 213/803 (2006.01) C07D 213/80 (2006.01)

Patent

CA 2253615

Nicotinic acid is produced from aqueous solutions of ammonium nicotinate by spray-drying. The nicotinic acid may 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 working-up 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 for foodstuffs and feedstuffs.

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