Process for the preparation of crystalline sheet-type alkali met

Details Process for the preparation of crystalline sheet-type alkali met Process for the preparation of crystalline sheet-type alkali met

1985-01-02

1986-03-25

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423326, 423327, 423328, 423329, 423330, 423332, 423333, C01B 3320

Patent

active

045782580

ABSTRACT:
A process for the preparation of a crystalline sheet-type alkali metal silicate in an aqueous medium is described, in which an acidic compound is added to an amorphous alkali metal silicate, or an alkali metal silicate dissolved in water, having a molar ratio M.sub.2 O/SiO.sub.2 (M=alkali metal) of 0.24 to 2.0, in an amount such that a molar ratio M.sub.2 O (unneutralized)/SiO.sub.2 of 0.05 to 0.239 is obtained. If required, the molar ratio SiO.sub.2 /H.sub.2 O is adjusted from 1:5 to 1:100 by dilution, and the reaction mixture is kept at a reaction temperature of 70.degree. to 250.degree. C. until the sheet-type alkali metal silicate has crystallized out.

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