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US 12,358,937 B2Granted
Precious metal compounds
AssigneeUmicore AG & Co. KG
InventorsEileen Woerner, Timo Ebert, Michael Lennartz, Ralf Karch, Angelino Doppiu, Andreas Rivas-Nass, Annika Frey
Life of this patent
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Abstract
The invention relates to tetraalkylammonium-tetra- or hexahydroxometallates such as tetraethylammonium hexahydroxoplatinate, (N(alkyl)4)y[M(OH)x], a method for the production thereof, and the use thereof for producing catalysts.
Claims11
A method of preparing tetraalkylammonium tetra- or hexa-hydroxy metallate of the formula (N(alkyl)4)y[M(OH)x], wherein
- M is a metal selected from the group consisting of rhodium, platinum, or palladium;
- alkyl is an alkyl group selected from the group consisting of ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, sec-pentyl, 3-pentyl, 2-methylbutyl, isopentyl, 3-methylbut-2-yl, 2-methylbut-2-yl, neopentyl, n-hexyl, 3-methylpentyl, isohexyl, neohexyl, 2,3-dimethylbutyl, and combinations thereof;
- Y is 2, or 3;
- and
- X is 6;
- said method comprising reacting hydroxy compounds of a metal selected from the group consisting of rhodium, platinum, or palladium with tetraalkylammonium hydroxide—optionally in the presence of a reaction medium.
3 more elements
Dependencies are inferred from the claim text.