METHOD OF PREPARING ALUMOAMMONIUM ALUM

METHOD OF PREPARING ALUMOAMMONIUM ALUM

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%. Aqueo...

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Bibliographische Detailangaben
Hauptverfasser: DAVYDOV N.A, IL'IN A.N, FOMIN V.K, UKLONSKIJ I.P, DENISENKOV V.F
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS
INORGANIC CHEMISTRY
METALLURGY
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Beschreibung
Zusammenfassung: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.