Manufacture of cyanuric acid

Details Manufacture of cyanuric acid Manufacture of cyanuric acid

1975-12-09

1976-12-07

Ford, John M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D25132

Patent

active

039962253

ABSTRACT:
Waste digester liquor, containing dissolved triazines, ammonium salts and iron, is treated with a mineral base until the pH is about 2.5 to 4 whereby triazines are precipitated while most of the iron remains dissolved. The triazines are separated and recycled back to the digester. The pH of the filtrate is increased to about 11 and the ammonia stripped off and recovered leaving an essentially nitrogen free aqueous solution. This can be sewered directly or concentrated to recover the salts.

REFERENCES:
patent: 3835136 (1974-09-01), Hirdler et al.

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