Synthetic platy magadiite and octasilicate
AssigneeThe Dow Chemical Company
InventorsJuan M. Garces, Steven R. Lakso
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Abstract
A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or (b) alkylated to produce an organophilic material. A method for the production of platy sodium octasilicate and a method for preparing a liquid aqueous colloidal silica dispersion having a mole ratio of silica to sodium oxide of 3.5 to 10 are further disclosed.
Claims11
A method for producing synthetic magadiite, comprising the step of:
- heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite.
Synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy magadiite in the form of individual plates.
Synthetic magadiite wherein more than eighty percent by weight of the synthetic magadiite is platy magadiite in the form of individual plates.
Synthetic magadiite wherein more than ninety percent by weight of the synthetic magadiite is platy magadiite in the form of individual plates.
The acidified synthetic platy magadiite of claims 7 or 10, wherein the surface hydroxyls of the acidified synthetic platy magadiite are alkylated.
Dependencies are inferred from the claim text.