AMORPHOUS ALUMINOSILICATE AND ITS PRODUCTION

摘要

PURPOSE: To enhance the ion exchange ability of an amorphous aluminosilicate by controlling the pore structure so that the specific surface area due to pores of 30-50Åradius is regulated to >=10m<2> /g. CONSTITUTION: An aq. soln. is kept at <=40 deg.C, an aq. soln. of sodium aluminate kept at the same temp. is put and they are stirred. An aq. soln. of sodium silicate is then put in the resultant mixed aq. soln. under stirring and they are brought into a reaction to prepare a slurry. This slurry is spray-dried at <100 deg.C temp. of the precipitate after filtration to obtain the objective amorphous aluminosilicate having >=10m<2> /g specific surface area due to pores of 30-50Åradius.