Process for preparation of a catalytic microcomposite from a silicate and a highly fluorinated ion exchange resin
AssigneeE. I. Du Pont de Nemours and Company
InventorsMark Andrew Harmer, Qun Sun
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Abstract
The present invention relates to a process for preparing a microcomposite comprising a highly fluorinated ion-exchange polymer containing pendant sulfonate functional groups, said polymer existing as aggregated particles entrapped within and dispersed throughout a network of silica. Due to their high surface area and acid functionality, these microcomposites possess wide utility as improved solid acid catalysts, particularly in the substitution of aromatic compounds, in the decomposition of hydroperoxides, and in the isomerization of olefins.
Claims10
A process for the preparation of a porous microcomposite which comprises a highly fluorinated ion-exchange polymer containing pendant sulfonate functional groups, said polymer existing as aggregated particles entrapped within and dispersed throughout a network of silica, wherein the weight percentage of the highly fluorinated ion-exchange polymer in the microcomposite is from about 0.1 to about 90 percent;
- said process comprising the steps of:
- (a) preparing a liquid composition consisting essentially of water and a highly fluorinated ion-exchange polymer containing pendant sulfonate functional groups;
- (b) contacting said liquid composition with a solution consisting essentially of water and a silicate selected from the group consisting of:
- sodium silicate, ammonium silicate, potassium silicate, and any combination thereof;
- (c) allowing the silicate to form a network of silica;
- and
- (d) recovering the porous microcomposite.
Dependencies are inferred from the claim text.