METHOD OF PREPARING ALUMOAMMONIUM ALUM Russian patent published in 2000 - IPC

Abstract RU 2144503 C1

FIELD: chemical industry. SUBSTANCE: method comprises decomposing aqueous suspension of aluminium hydroxide with sulfuric acid to produce aluminium sulfate melt, dissolving it with water to give aluminium sulfate solution at Al₂O₃:SO₃ molar ratio of 1: (3.16-3.42 with concentration of 20- 25%. Aqueous ammonium sulfate solution with concentration of about 35% is prepared, aluminium sulfate and ammonium sulfate solution are mixed, and mixture is cooled. Precipitated crystals of alumoammonium alum are separated by filtration or centrifugation without washing and drying operations. EFFECT: higher yield and improved property of alumoammonium alum.

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RU 2 144 503 C1

Authors

Uklonskij I.P.

Denisenkov V.F.

Il'In A.N.

Davydov N.A.

Fomin V.K.

Dates

2000-01-20—Published

1999-05-25—Filed