Direct coal liquefaction with integrated product hydrotreating and catalyst cascading
US8226821B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 19, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | May 12, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A multi-stage catalytic process for the direct liquefaction of coal is utilized with a hydrotreater to first liquefy and subsequently treat the product in one integrated process. A fresh hydrogenation catalyst is used to reduce heteroatoms (S, N) from coal liquids in the downstream hydrotreater. This catalyst is then cascaded and re-used in the direct coal liquefaction process, first in the low temperature Stage 1, and then re-used in the high temperature Stage 2. Coal liquid products have very low contaminants and can be readily used to produce gasoline and diesel fuel. Catalyst requirements are substantially lowered utilizing this novel process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.