Catalytically highly effective precious metal-carboxylate compounds of Ir, Ru, Rh, Pd and Au
US11045795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2018 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Dec 2, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/827
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Processes produce catalytically highly effective noble metal carboxylate compounds or their solutions that 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. The process digests the noble metal with alkaline earth peroxide to produce a digestion mass and dissolves the digestion mass in a carboxylic acid or a carboxylic acid diluted with a protic solvent to produce a resulting solution, whereby alkaline earth ions are separated off as salt of an oxalic acid or salt of oxalic acid derivatives, and the processes do not include any BaSO4 precipitation and filtration of barium sulphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.