Hydrothermal process for preparing a unimodal large pore silica

摘要

A hydrothermal process for preparing a modified amorphous silica has been prepared. The process involves mixing a slurry of a silica with a mineralizer such as sodium hydroxide or sodium carbonate at a temperature of about 85 DEG C. to about 300 DEG C. for a time of about 4 hours to about 10 days. The silica thus produced has a unimodal pore distribution with pores in the range of about 300 ANGSTROM to about 25,000 ANGSTROM .