Incipient wetness method for making metal-containing cyanide catalysts
US6423662B1 · kind B1 · utility
7Cited by
8References
23Claims
0Family size
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Key dates
| Filing date | May 19, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | May 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2663
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Metal cyanide catalysts are prepared by first forming a precipitate using no more than a stoichiometric amount of a water-soluble metal salt of the form MxAy, based on the amount of metal cyanide compound that is used. The precipitate is then treated with an additional quantity of a metal salt of the form M3xAy, in which M3 may be the same as or different than M. The catalyst is treated with a complexing agent, either during the precipitation step or during the subsequent treatment with the M3xAy salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.