Preparation of a precious metal salt of a nonoxidizing acid by direct reaction
AssigneeElf Atochem North America, Inc.
InventorMichael D. Gernon
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Abstract
A process is disclosed for the manufacture of precious metal salts by the direct reaction of a precious metal and an oxidizing agent in the presence of a nonoxidizing acid.
Claims23
A process for the direct synthesis of a precious metal salt of a nonoxidizing acid comprising reacting together a precious metal and an oxidizing agent in the presence of a substituted or unsubstituted C.sub.1 -C.sub.40 alkanesulfonic acid.
A process for the direct synthesis of a silver salt of a linear C.sub.1 -C.sub.3 alkanesulfonic acid comprising reacting together silver metal needles having a mesh size ranging from 8 to 100 with a linear C.sub.1 -C.sub.3 alkanesulfonic acid at an acid to silver weight ratio ranging from about 2:1 to about 1:1, a temperature ranging from about 10.degree. C. to about 80.degree. C., a pressure ranging from about 0.1 to about 10 atmospheres, and for a time ranging from about 4 hours to about 48 hours, in the presence of hydrogen peroxide at a total peroxide to silver mole ratio ranging from about 6:1 to about 1/2:1.
Dependencies are inferred from the claim text.