Process for the recovery of ammonia and sulphur dioxide from a c

Details Process for the recovery of ammonia and sulphur dioxide from a c Process for the recovery of ammonia and sulphur dioxide from a c

1978-04-24

1980-06-17

Vertiz, O. R.

Chemistry of inorganic compounds

Nitrogen or compound thereof

Ammonia or ammonium hydroxide

423541A, C01C 102, C01B 1750

Patent

active

042083907

ABSTRACT:
An improved process for the recovery of ammonia and sulphur dioxide from a by-product mixture containing an ammonium salt of sulphuric acid obtained as a by-product in the preparation of .epsilon.-caprolactam or cyclohexanone oxime. The by-product mixture is reacted, in finely divided form and at a temperature of from 700.degree. to 950.degree. C., with gases obtained from the combustion of a fuel in a controlled amount of oxygen, and ammonia and sulphur dioxide are thereafter separated from the resulting reaction mixture. The amount of oxygen is controlled to be less than the theoretical additional amount that would be required to convert the nitrogen, sulphur, hydrogen and carbon contained in the by-product mixture and fuel into, respectively, N.sub.2, SO.sub.2, H.sub.2 O and CO.sub.2.

REFERENCES:
patent: 3254951 (1966-06-01), Kautter et al.
patent: 3942237 (1976-03-01), Fukert
patent: 3991047 (1976-11-01), Moudry et al.

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