Process for the reduction of activated chromium oxide catalyst
US7407591B2 · kind B2 · utility
34Cited by
9References
5Claims
0Family size
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Key dates
| Filing date | Apr 21, 2005 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D2101/43
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Process for the reduction of a hexavalent chromium oxide based catalyst comprising contacting, under mixing conditions, a hexavalent chromium oxide based catalyst, with a molar excess, in respect of the chromium species, of a solid reducing agent and subjecting the mixture to a temperature in the range 30-1000° C. The process is simple, involves low costs and allows to obtain a permanently reduced chromium catalyst that can be disposed without toxicity risks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.