Method of producing lube stocks from waxy crudes
US4678556A · kind A · utility
21Cited by
12References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G67/0409
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Multi-step synergistic process for converting waxy-containing hydrocarbon feedstocks to lube oil stocks having targeted pour points is disclosed. The waxy feed is first catalytically partially dewaxed with the catalyst having the structure of ZSM-5, and then the partially dewaxed oil is subjected to solvent dewaxing to reach a targeted pour point. Pretreating the crude prior to catalytic dewaxing process such as by deasphalting and aromatic removal is also disclosed. In an alternative process, the waxy-containing hydrocarbon feed is subjected to the steps of solvent dewaxing, catalytic dewaxing, and solvent dewaxing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.