Treatment of feed for high severity visbreaking
US4767521A · kind A · utility
12Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G67/049
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Prior to upgrading a viscous feed by visbreaking, at least a portion of the feed is treated to remove a heavy phase in specified amounts, whereby the severity of the visbreaking may be increased. The Shell Hot Filtration number of the visbreaking product is reduced by at least 75%, compared to visbreaking of untreated feed at some severity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.