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US 4,067,823 AGranted
Thallium(III) reagents supported on montmorillonite clay minerals and oxythallation processes for utilizing same
AssigneeEmery Industries, Inc.
InventorsJohn F. White, Edward C. Taylor, Chih-Shu Chiang
Life of this patent
Estimating the term…
Abstract
Improved supported thallium(III) reagents are provided which significantly improve reaction rates and product selectivity of oxythallation reactions. The present reagents have a thallium(III) salt of an acid on the surface and within montmorillonite clay minerals.
Claims6
A supported thallium reagent consisting essentially of a thallium salt of a Bronsted acid and a support comprising an acidic montmorillonite clay mineral having a surface area greater than about 200 m.sup.2 /g, said reagent containing 0.5 to 50 weight percent thallium with at least 75% of the thallium in the +3 oxidation state.
Dependencies are inferred from the claim text.