Manufacture of lubricating oils
US5273645A · kind A · utility
13Cited by
14References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Sep 17, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for reducing the pour point of a hydrocarbon feedstock that contains aromatic compounds, sulfur-containing compounds and nitrogen-containing compounds is provided. The method involves solvent extraction and utilizes a catalytic hydrodewaxing zone with a first section having a shape-selective molecular sieve-containing catalyst composition which is substantially free of Group VIII metals and a second section having a Group VIII metal-containing hydrogenation catalyst composition with a porous support material substantially free of acidic crystalline molecular sieve material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.