Process for preparing sodium disilicate having a high...

Details Process for preparing sodium disilicate having a high... Process for preparing sodium disilicate having a high...

C - Chemistry, Metallurgy

01

B

C01B 33/32 (2006.01) C01B 33/38 (2006.01) C11D 3/08 (2006.01) C11D 3/12 (2006.01) C11D 7/14 (2006.01)

Patent

CA 2187710

The invention relates to a process for preparing sodium disilicate in the .beta. form having a high ion-exchange capacity and a molar ratio Na2O: SiO2 of about 1:2 from a silicate source and sodium hydroxide solution at elevated temperature, with the product formed being separated off by filtration, wherein the product is further heat treated at from 450° to 780°C and/or is pressed to form compact parts.

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