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US 5,330,734 AGranted
Silica pillared micas
AssigneeExxon Research & Engineering Co.
InventorsJack W. Johnson, John F. Brody
Life of this patent
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Abstract
Microporous materials of low acidity useful as sorbents and catalytic supports have been produced by pillaring tetrasilicic mica with silica polyoxocations generated by hydrolysis of organosilane precursors. Calcination at an intermediate temperature followed by washing of the solid with water is important in producing highly microporous material.
Claims10
A method of producing a silica-pillared mica comprising the steps of:
- (a) contacting a fluoromica having layers with a material selected from the group consisting of organosilicon precursors and organosilicon oligomers for a time and at a temperature sufficient to allow said material to intercalate between said layers of said fluoromica;
- (b) calcining said fluoromica having said material diffused therein for a time and at a temperature sufficient to decompose said material into a silica pillar and to form an intermediate pillared mica product;
- (c) washing said calcined intermediate pillared mica product;
- (d) recalcining said washed and calcined intermediate pillared mica product for a time and at a temperature sufficient to form a silica pillared mica.
1 more element
Dependencies are inferred from the claim text.