Process for the removal of ammonium sulphate from tarrich waste

Details Process for the removal of ammonium sulphate from tarrich waste Process for the removal of ammonium sulphate from tarrich waste

1991-04-04

1992-08-25

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

208 13, 210723, 23302A, C01C 124

Patent

active

051417324

ABSTRACT:
The ammonium sulphate contained in tar-rich waste streams from the production of (meth)acrylonitrile can be precipitated out by adding 1 to 30 times the amount by weight of methanol, relative to the water content of the waste stream, and additionally 0.05 to 10% the amount by weight of ammonia, relative to methanol, to such a waste stream at 10.degree.-60.degree. C. and separating off the ammonium sulphate which precipitates out. The waste stream remaining after separating off the ammonium sulphate can, for example, be disposed of as low-sulphur waste-fuel in a combustion chamber.

REFERENCES:
patent: 3408157 (1968-10-01), Miller et al.
patent: 3902859 (1975-09-01), Greco
Chemical Abstracts, vol. 88, 1978, paragraph No. 123360s, Columbus, Ohio, US: & JP-A-52 153 899 (Ube Industries) 21.12.1977.

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