Process for the low-temperature depolymerization of coal and its conversion to a hydrocarbon oil
US4728418A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1985 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Oct 23, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel process for the low-temperature depolymerization and liquefaction of coal wherein the coal is subjected to sequential processing steps for the cleavage of different types of intercluster lnikages during each processing step. A metal chloride catalyst is intercalated in finely crushed coal and the coal is partially depolymerized under mild hydrotreating conditions during the first processing step. In the second processing step the product from the first step is subjected to base-catalyzed depolymerization with an alcoholic solution of an alkali hydroxide, yielding an almost fully depolymerized coal, which is then hydroprocessed with a sulfided cobalt molybdenum catalyst in a third processing step to obtain a hydrocarbon oil as the final product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.