Process for preparing a lightweight expanded silicate...

Details Process for preparing a lightweight expanded silicate... Process for preparing a lightweight expanded silicate...

C - Chemistry, Metallurgy

04

B

6/212

C04B 14/04 (2006.01) C04B 18/10 (2006.01) C04B 20/06 (2006.01)

Patent

CA 1230707

ABSTRACT OF THE DISCLOSURE Disclosed is a process for making a lightweight silicate aggregate. The process includes the steps of mixing together dry rice hull ash, an alkali metal hydroxide, boric acid, and water; heating the mixture to a temperature sufficient to initiate reaction; curing the composition at a temperature less than the boiling point of water until the reaction is complete; comminuting the cured product and heating the comminuted product to form the expanded aggregate.

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