Hydrodewaxing
US4446007A · kind A · utility
14Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1982 |
| Grant date | May 1, 1984 |
| Priority date | — |
| Expiry date | Jun 8, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G45/64
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved method for hydrodewaxing a petroleum or shale oil fraction, e.g. petroleum distillate, in a reactor is provided which involves contacting said fraction with hydrogen in the presence of a catalyst comprising a crystalline zeolite having a silica to alumina mole ratio of at least 12 under hydrodewaxing conditions wherein the average reactor temperature at start-up of from about 200.degree. C. to 310.degree. C. is increased uniformly to at least 360.degree. C. within about seven days from start-up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.