Rapid hydropyrolysis of carbonaceous solids
US4326944A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1980 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Apr 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/903
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for recovering liquids and gases by a rapid hydropyrolysis of carbonaceous solids which comprises subjecting the carbonaceous material in a stream of carrier gas to a first pressure and a first temperature below the decomposition temperature of the carbonaceous material; reducing substantially in a single step the pressure on the stream of carbonaceous material from the first pressure to a second pressure, the ratio of the first pressure to the second pressure being at least 1.6, thereby accelerating the carrier gas in the stream of carbonaceous material; permitting the accelerated stream of carbonaceous material to expand as a free jet and mixing hot gas with the accelerated and expanded stream of carbonaceous material to raise the temperature of the carbonaceous material by heat exchange with the hot gas, to a second temperature of at least the aforesaid decomposition temperature, thereby initiating decomposition of the carbonaceous material; and reducing the temperature of the reaction mixture to below said decomposition temperature, with the total time for heating the carbonaceous material from the first temperature to the second temperature, decomposing t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.