High severity visbreaking
US4773986A · kind A · utility
15Cited by
13References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | Sep 27, 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
The severity of a visbreaking operation is increased by treating product to remove a heavier phase in an amount of less than 15 weight percent and provide a remaining product having a Shell Hot Filtration number of less than 0.25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.