Catalytically highly effective precious metal-carboxylate compounds of ir, ru, rh, pd and au
AssigneeHeraeus Precious Metals GmbH & Co. KG
InventorsRichard Walter, Horst Meyer, Steffen Voss, Jan Schapp
Life of this patent
Estimating the term…
Abstract
The invention relates to a process for the production of noble metal carboxylate compounds, in which a noble metal is digested with at least one metal salt in a container and the digestion mass is dissolved in a carboxylic acid and the metallic ions introduced by the metal salt are separated from the resulting solution by means of oxalate or an oxalate derivative.
Claims7
1-13. (canceled)
A process for the production of catalytically highly effective noble metal carboxylate compounds or their solutions, wherein the catalytically highly effective nobel metal carboxylate compounds or their solutions comprise A) a noble metal carboxylate, wherein the noble metal is selected from the group consisting of ruthenium, platinum, palladium, rhodium and gold, and B) at least one compound selected from the group consisting of oxalic acid. a salt of oxalic acid, a derivative of oxalic acid and a salt of the derivative of oxalic acid, said process comprising:
- digesting the noble metal with alkaline earth peroxide;
- and dissolving a digestion mass in a carboxylic acid or a carboxylic acid diluted with a protic solvent,
- wherein, from a resulting solution, alkaline earth ions are separated off as salt of an oxalic acid or salt of oxalic acid derivatives.
Dependencies are inferred from the claim text.