Hydroprocessing catalysts and methods for making thereof
US8927448B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2011 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Nov 6, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/802
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method to prepare an improved catalyst feed to a system to upgrade heavy oil. The method comprises: providing a spent catalyst that has been used in a hydroprocessing operation has with a solid content ranging from 5 to 50 wt. % in soluble hydrocarbons and having less than 80% but more than 10% of original catalytic activity; removing at least 50% of the soluble hydrocarbons removed in a deoiling step; treating the deoiled spent catalyst with a treating solution containing at least one of plain water, a mineral acid, an oxidizing agent, and combinations thereof to reduce the concentration of at least one metal contaminant in the deoiled spent catalyst by at least 40%. After treatment, the treated deoiled spent catalyst is slurried in a hydrocarbon medium, and fed to the heavy oil upgrade system as part of the catalyst feed system with a fresh slurry catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.