Nicotinamide production

Details Nicotinamide production Nicotinamide production

1980-04-21

1982-04-27

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21356

Patent

active

043272193

ABSTRACT:
In the hydrolysis of nicontinonitrile to nicotinamide, the hydrolysis effluent, containing nicotinamide, unconverted nicotinonitrile, ammonia and some ammonium nicotinate is stripped with gaseous ammonia to produce a molten nicontinamide bottoms, essentially free of nicotinonitrile, containing less than 10 wt % water and an overhead containing water vapor, ammonia and nicotinonitrile. An aqueous solution of ammonia and unreacted nicotinonitrile is recovered from the overhead and recycled to the hydrolysis, with gaseous ammonia in the overhead being recycled to the stripping.

REFERENCES:
patent: 4008241 (1977-02-01), Gelbein et al.
patent: 4139536 (1979-02-01), Beschke et al.

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