Single stage, stacked bed hydrotreating process utilizing a noble metal catalyst in the upstream bed
US5868921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G65/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A hydrocarbon distillate fraction is hydrotreated in a single stage by passing the distillate fraction downwardly over a stacked bed of two hydrotreating catalysts. The catalyst in the upper bed contains 0.1 to 15% by weight of platinum and/or palladium and also contains 2 to 40% by weight of at least one of tungsten, chromium, a Group VIIB metal, and an actinium series metal supported on an acidic refractory oxide carrier. The catalyst in the lower bed contains 1 to 15% by weight of a non-noble Group VIII metal and 1 to 25% by weight of a Group VIB metal on an amorphous, refractory oxide carrier. The liquid hydrocarbon product recovered has a reduced content of aromatics and a reduced heteroatom content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.