Process for middle distillae production form fischer-tropsch waxes using a modified-zeolite-based catalyst
US8845881B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 13, 2010 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | May 27, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G65/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for the production of middle distillates from a paraffinic feedstock that is produced by Fischer-Tropsch synthesis, implementing a hydrocracking/hydroisomerization catalyst that comprises at least one hydro-dehydrogenating metal that is selected from the group that is formed by the metals of group VIB and group VIII of the periodic table and a substrate that comprises at least one zeolite that has at least one series of channels of which the opening is defined by a ring with 12 oxygen atoms modified by a) a stage for introducing at least one alkaline cation that belongs to group IA or IIA of the periodic table, b) a stage for treatment of said zeolite in the presence of at least one molecular compound that contains at least one silicon atom, c) at least one stage for partial exchange of said alkaline cations by NH4+ cations such that the remaining content of alkaline cations in the modified zeolite at the end of stage c) is such that the alkaline cation/aluminum molar ratio is between 0.2:1 and 0.01:1, and d) at least one heat treatment stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.