Recovery of Aluminum Hydroxy Sulfate from Aluminum Sulfate Solution by High-Temperature Hydrolysis

摘要

As part of its program to lessen dependence on foreign bauxite as the Nation's primary source of cell-grade alumina, the Bureau of Mines is investigating sulfuric acid (H2SO4) leaching procedures for the recovery of alumina from domestic aluminous materials. The successful application of a H2SO4 leaching process depends on the recovery of the aluminum values in an easily washed and filtered form, containing a minimum of water to be driven off in the subsequent calcination step. This goal was met by the high-temperature hydrolysis of simulated aluminum sulfate (Al2(SO4)3) leach liquor.