Metal-doped sulfonated ion exchange resin catalysts
AssigneeRohm and Haas Company
InventorsMark Thornton Vandersall, Rudolf Alfred Weinand
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Abstract
A method for preparing ketones in greater yield and selectivity compared to previous catalyzed reactions by acid-catalyzed condensation reaction using a metal-doped polysulfonated ion exchange resin catalyst is disclosed. For example, use of polysulfonated ion exchange resins having at least 5.0 milliequivalents sulfonic acid groups/gram catalyst and loaded with metal, such as palladium, provides enhanced yields of methyl isobutyl ketone from the condensation reaction of acetone compared to use of conventional monosulfonated ion exchange resin catalysts.
Claims8
A process for preparing ketones having 6 or more carbon atoms comprising contacting a ketone reactant with hydrogen in presence of a polysulfonated ion exchange resin catalyst, wherein the catalyst comprises:
- (a) 1 to 85 percent polymerized crosslinker units, based on dry weight of catalyst;
- (b) 5.0 to 7.0 milliequivalents sulfonic acid groups per gram, based on dry weight of catalyst;
- and
- (c) 0.1 to 2 percent metal ion, based on dry weight of the catalyst, distributed therein and selected from one or more of palladium, platinum, iridium, rhodium, ruthenium, osmium, copper, nickel and zirconium.
Dependencies are inferred from the claim text.