Method for improving the sedimentation and filterability of coal-derived liquids
US4132639A · kind A · utility
5Cited by
7References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 4, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Aug 4, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improvement in the separation of suspended solids from coal-derived liquids by a separations process in which solids size is a separations parameter is achieved by contacting the coal-derived liquid containing suspended solids with an effective amount of an additive selected from the group of sulfuric acid, phosphoric acid, phosphoric anhydride and salts of sulfuric and phosphoric acid, and maintaining the contacted liquid at a temperature within the range of about 150.degree.-400.degree. C and for a time sufficient to achieve the desired separation rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.