Coal pyrolysis
US4218303A · kind A · utility
5Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Oct 19, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/943
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Hydropyrolysis of coal can be done as a two stage process, offering good yields of benzene. The first stage is carbonization of coal in the presence of hydrogen or reactive gas at elevated pressure. The volatile products, without cooling or condensing, are then subjected to cracking at a temperature above the carbonization temperature, in the absence of catalyst, in the presence of hydrogen or reactive gas. The char remaining is reactive and can be gasified. The process is e asier to control and offers many advantages compared to prior proposed single stage hydropyrolysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.