In situ mitigation of coke buildup in porous catalysts by pretreatment of hydrocarbon feed to reduce peroxides and oxygen impurities
US5690809A · kind A · utility
32Cited by
4References
13Claims
0Family size
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Key dates
| Filing date | Apr 18, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Apr 18, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/95
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process is provided for in situ mitigation of coke buildup and porous catalyst used for the processing of hydrocarbon feed stocks. The process exhibits improved catalyst activity over extended periods and the process comprises the pretreatment of hydrocarbon feed stocks to reduce impurities in the feed stocks in the form of peroxides and oxygen compounds that promote the formation of coke precursors, which precursors are typically in the form of olefinic oligomers. The process includes contacting the pretreated feed stream with a suitable catalyst under sub-critical, near-critical and supercritical conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.