High temperature hydrolysis of aluminum sulfate solutions
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorDonald E. Shanks
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Abstract
Aqueous aluminum sulfate solution is hydrolyzed at temperatures above about 300.degree. C. to produce a basic aluminum sulfate product that is readily purified and converted to Al.sub.2 O.sub.3.
Claims3
A process for hydrolysis of dilute aqueous aluminum sulfate solution containing about 100-300 grams per liter of aluminum sulfate and minor amounts of impurities consisting essentially of maintaining said solution in a closed system at a hydrolysis temperature above 300.degree. C. for a time sufficient to convert a high percentage of the aluminum sulfate to the insoluble basic aluminum sulfate, Al(OH)SO.sub.4, and subsequently quenching the closed system in water.
Dependencies are inferred from the claim text.