Process and catalyst for the dewaxing of shale oil
US5084159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G45/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The pour point and/or cloud point of the lube fractions comprising a waxy hydrocarbon feedstock containing straight and branched chain paraffins is reduced by contacting the feedstock in a dewaxing zone, preferably in the presence of added hydrogen, with a dewaxing catalyst comprising (1) an intermediate pore crystalline molecular sieve having a pore size between about 5.0 Angstroms and about 7.0 Angstroms and (2) a large pore crystalline molecular sieve having a pore size above about 7.0 Angstroms and typically selected from the group consisting of silicoaluminophosphates, ferrosilicates, aluminophosphates and Y zeolites. A hydrocarbon fraction of reduced paraffin content is recovered from the effluent of the dewaxing zone. Preferred intermediate pore crystalline molecular sieves are silicalite and a ZSM-5 type zeolite. Preferred large pore crystalline molecular sieves are silicoaluminophosphates such as SAPO-5 and ammonium exchanged and steamed Y zeolites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.