METHOD OF PRODUCTION OF ALUMINUM SULFATE Russian patent published in 2008 - IPC C01F7/74 

FIELD: nonferrous metallurgy; environmental protection; other industries; methods of production of the aluminum sulfate.

SUBSTANCE: the invention is pertaining to the technology of obtaining of production of the aluminum sulfate, which is used as the coagulum at purification of the economic-drinking, industrial and the waste waters in the industrial and technological processes and may be used at the enterprises engaged in the reprocessing of the primary piles aluminum-containing slag. The method of production of the aluminum sulfate provides for the preliminary washing of the slag containing the aluminum oxide from the salts by its treatment with the sulfuric acid, separation by filtering of the produced solution from the sand. The sand is flushed, and the purified solution after filtration is fed into the crystallizer tank and cooled. Separate the crystals of aluminum sulfate from the mother solution, which composition contains the sulfuric acid. T the crystals of aluminum sulfate are flushed by the organic solvent, dried and packed in the bags. After this flushing they separate the organic solvent at the temperature of its boiling point by distillation from the remained mixture of the organic solvent, the water and the sulfuric acid. The liquefied organic solvent is used in the subsequent flushing operations, and the mother solution, which contains the sulfuric acid, is used on the subsequent stages of the slag treatment. The invention allows to realize effectively the universal wasteless ecologically safe technology of production of aluminum sulfate.

EFFECT: the invention ensures the effective realization of the universal wasteless ecologically safe technology of production of the aluminum sulfate.

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