Process for purifying waste water containing ammonium sulfate

Details Process for purifying waste water containing ammonium sulfate Process for purifying waste water containing ammonium sulfate

1975-08-26

1977-11-15

Vertiz, O. R.

Chemistry of inorganic compounds

Sulfur or compound thereof

Elemental sulfur

210 45, 210 47, 210 52, 423356, 423541A, C01B 1702, C02B 134, C02C 506

Patent

active

040585913

ABSTRACT:
This process for purifying waste-water containing ammonium sulfate comprises reacting said waste-water with calcium oxide, calcium sulfide and ammonium sulfite; roasting the resulting precipitate to regenerate calcium oxide and calcium sulfide; and reacting sulfur dioxide with hydrogen sulfide obtained in a prior step to yield sulfur.

REFERENCES:
patent: 1108705 (1914-08-01), Cobb
patent: 1274247 (1918-07-01), Danneel et al.
patent: 2856267 (1958-10-01), Kamlet
patent: 2862789 (1958-12-01), Burgress
patent: 3561925 (1971-02-01), Deschamps et al.
patent: 3729551 (1973-04-01), Gorin
patent: 3862335 (1975-01-01), Renault et al.

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