Regeneration of alkali metal sulfides from alkali metal hydrosulfides
US4147611A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1978 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Feb 13, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G49/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Alkali metal sulfides are regenerated from alkali metal hydrosulfides which are produced as a result of the hydroconversion of heavy carbonaceous feeds. The regeneration is effected by treating the spent solids from a hydroconversion reactor, said solids containing an alkali metal hydrosulfide, with water and carbon dioxide at a temperature and pressure sufficient to convert about 50% of the alkali metal hydrosulfide to an alkali metal carbonate, and heating a mixture of said alkali metal carbonate and unreacted alkali metal hydrosulfide with a quantity of coke to an elevated temperature sufficient to cause reaction of the hydrosulfide with the carbonate whereby an alkali metal sulfide is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.