Granular materials comprising inorganic silicon-containing mater

Details Granular materials comprising inorganic silicon-containing mater Granular materials comprising inorganic silicon-containing mater

1997-06-18

2000-02-29

Le, Hoa T.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

210661, 428407, B32B 516

Patent

active

060307048

ABSTRACT:
A granular material for the sorption of organic material comprises granules of an inorganic silicon-containing material having negatively charged sites and having an average granule size of at least 50 microns, the granules being porous and coated on their outer and inner surfaces with a film of an organic polymeric material having polar and non-polar moieties. The organic polymeric material may form from 0.25% to 10% by weight of the weight of the inorganic material.
The granular material may be prepared by treating an aqueous suspension of the inorganic material with a material comprising the organic polymeric material. The inorganic silicon-containing material may comprise a silicate, eg. an aluminosilicate, eg. a kandite and/or smectite clay which may be a foamed material which has been calcined. The polymeric material may comprise a nitrogen-containing polymer which can be employed in the form of an acid colloidal medium, eg. a melamine-aldehyde polymer.

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