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US 4,397,766 AGranted
Solubilized chromium salt in particulate support
AssigneePhillips Petroleum Company
InventorsGil R. Hawley, Max P. McDaniel
Life of this patent
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Abstract
A chromium salt such as ammonium chromate or ammonium dichromate, which is normally insoluble in nonaqueous solvents which do not easily rehydrate the silica surface is solubilized, for instance by treating it with a crown ether, and impregnated onto a particulate support from a nonaqueous solvent which does not easily rehydrate the silica. The resulting composition is then activated in an oxygen ambient such as air in a conventional manner and then utilized as a catalyst for polymerization reactions such as the production of polyolefins.
Claims10
A process comprising:
- contacting a chromium-containing salt, which is insoluble in nonaqueous solvents which do not easily rehydrate silica, with a solubilizing agent thus converting said salt to a chromium-containing complex having charged ions which is soluble in said nonaqueous solvents;
- and
- impregnating a particulate silica-containing support with the thus solubilized chromium-containing complex dissolved in a nonaqueous solvent which does not easily rehydrate silica.
Dependencies are inferred from the claim text.