SPECIFIC SURFACE AREA CONTROL IN ALUMINA

摘要

PURPOSE:To obtain high-uniformity alumina of a wide range in its specific surface area including controlled pores by allowing aluminum alkoxide to react with polyether, then drying and calcining the gel formed by hydrolysis of the product. CONSTITUTION:An aluminum alkoxide is dissolved in an organic solvent and allowed to react with a polyether, then hydrolyzed to obtain a gel from the sol. Further the gel is further dried and calcined to give the objective alumina. In this process, polyether is used as a solvent to control the pores of the alumina product. The reaction temperature of the aluminum alkoxide in poly ether ranges from 10 deg.C to the boiling point of the polyether, preferably from 40 to 190 deg.C. The polyether used in the process is generally represented by the formula: R1(OR2),(OR3)m,(OR4)n,OR5 (R1 is alkyl; R2 through R4 are alkylene; R5 is alkyl; 1 is integer including 1).