Process for preparing sodium disilicate having a high ion-exchan

Details Process for preparing sodium disilicate having a high ion-exchan Process for preparing sodium disilicate having a high ion-exchan

1996-09-30

1999-04-20

Langel, Wayne

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423332, 510511, C01B 3332

Patent

active

058956379

ABSTRACT:
The invention relates to a process for preparing sodium disilicate in the .beta. form having a high ion-exchange capacity and a molar ratio Na.sub.2 O:SiO.sub.2 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.degree. to 780.degree. C. and/or is pressed to form compact parts.

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