Process for preparing alumina

摘要: An alumina composition comprising a microcrystalline boehmite-pseudoboehmite intermediate having from about 70 to 85 weight percent of the total amount Al 2 O 3 present in crystalline form. The is prepared by adding aluminum sulfate and sodium aluminate solutions mixture water solution precipitate adjusting pH higher than precipitation pH. reactant concentrations, rates addition, temperatures, pH's are specifically controlled form intermediate.