Hydrothermal synthesis of alkali metal silicates

摘要

This invention provides a method for the hydrothermal direct synthesis of alkali metal silicate in which an alkali metal compound solution and active silica are reacted with agitation at 60 to 110 DEG C at about atmospheric pressure to form waterglass. The alkali solution may be partially or wholly replaced by waterglass of silicate modulus less than 1.