Flexible process for producing base stock and distillates by conversion-hydroisomerisation using a catalyst with low dispersion followed by catalytic dewaxing
US6602402B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | May 1, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/15
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved process for producing very high quality base stock and for simultaneous production of high quality middle distallates, comprising successive hydroisomerisation and catalystic dewaxing steps wherein hydroisomerisation is carried out in the presence of a catalyst containing at least one noble metal deposited on an amorphous acidic support, the dispersion of the metal being less than 20%. The support is preferably an amorphous silica-alumina. Catalytic dewaxing is carried out in the presence of a catalyst containing at least one hydrodehydrogenating element (group VIII) and at least one molecular sieve (preferably zeolite). The sieve is preferable selected from NU-10, EU-1, EU-13, zeolite and ferrierite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.