Precious metal salt solutions and precious metal catalysts

Details Precious metal salt solutions and precious metal catalysts Precious metal salt solutions and precious metal catalysts

B - Operations, Transporting

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B01J 23/38 (2006.01) B01J 31/04 (2006.01) B01J 37/02 (2006.01) B01J 37/08 (2006.01) C07C 51/41 (2006.01) C07C 53/128 (2006.01) C07C 63/08 (2006.01)

Patent

CA 2006963

MOON-1 33 Title: PRECIOUS METAL SALT SOLUTIONS AND PRECIOUS METAL CATALYSTS Abstract of the Disclosure The present invention relates to a process for preparing solutions of precious metal salts of an organ- ic carboxylic acid, and the process comprises reacting an organic carboxylic acid with hydrated precious metal oxide in an organic solvent for the acid and the salt for a period of time at a temperature sufficient to form the desired organic precious metal salt. In one embodi- ment, the hydrated precious metal oxide is prepared by dissolving a precious metal in aqua regia, and there- after precipitating hydrated precious metal oxide from the solution by adding an inorganic base, preferably an aqueous alkaline solution. The process of the present invention results in the formation of solutions of the desirable precious metal carboxylates which generally are characterized as being high purity solutions, and the solutions are very effective catalysts. Precious metal and precious metal oxide powders obtained by recovering the salts from the solutions and decomposing the salts under either reducing or oxidizing conditions at relatively low temperatures are characterized as having enhanced surface area and small particle clusters and they can be used as very effective catalysts.

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