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AssigneeE. I. Du Pont de Nemours and Company
InventorsMark Andrew Harmer, Qun Sun
Estimating the term…
Porous microcomposites comprising a perfluorinated ion-exchange polymer (PFIEP) containing pendant sulfonic acid and/or carboxylic acid groups entrapped within and highly dispersed throughout a network of metal oxide, a network of silica, or a network of metal oxide and silica are prepared from PFIEP and one or more precursors selected from the group consisting of a metal oxide precursor, a silica precursor, and a metal oxide and silica precursor using an in situ process. Such microcomposites have a first set of pores having a pore size diameter ranging from about 0.5 nm to about 75 nm and may further comprise a second set of pores having a diameter ranging from about 75 nm to about 1000 nm. These microcomposites possess high surface area and exhibit high catalytic activity for a variety of reactions including, but not limited to, nitrations, esterifications, dimerizations, alkylations, polymerizations, acylations, and isomerizations.
A porous microcomposite comprising perfluorinated ion-exchange polymer with pendant sulfonic acid groups, carboxylic acid groups, or sulfonic acid and carboxylic acid groups entrapped within and highly dispersed throughout a network of metal oxide, a network of silica, or a network of metal oxide and silica, wherein the weight percentage of perfluorinated ion-exchange polymer in the micro-composite is from about 0.1 to about 90 percent, wherein the size of a first set of pores in the microcomposite is about 0.5 nm to about 75 nm, and wherein the microcomposite optionally further comprises a second set of pores having a size in the range of about 75 nm to about 1000 nm.
A process of preparation of a porous microcomposite which comprises perfluorinated ion-exchange polymer containing pendant sulfonic acid groups, carboxylic acid groups, or sulfonic acid and carboxylic acid groups entrapped within and highly dispersed throughout a network of metal oxide, a network of silica, or a network of metal oxide and silica, wherein the weight percentage of perfluorinated ion-exchange polymer in the microcomposite is from about 0.1 to about 90 percent, wherein the size of a first set of pores in the microcomposite is about 0.5 nm to about 75 nm, and wherein the microcomposite optionally further comprises a second set of pores having a size in the range of about 75 nm to about 1000 nm;
Dependencies are inferred from the claim text.