Donor solvent coal liquefaction with bottoms recycle at elevated pressure
An improved process is disclosed for liquefying solid carbonaceous materials wherein increased naphtha yields are achieved by effecting the liquefaction at a pressure within the range from about 1750 to about 2800 psig in the presence of recycled bottoms and a hydrogen-donor solvent containing at least 0.8 wt % donatable hydrogen. The liquefaction is accomplished at a temperature within the range from about 700/sup 0/ to about 950/sup 0/ F. The coal:bottoms ratio in the feed to liquefaction will be within the range from about 1:1 to about 5:1 and the solvent or diluent to total solids ratio will be at least 1.5:1 and preferably within the range from about 1.6:1 to about 3:1. The yield of naphtha boiling range materials increases as the pressure increases but generally reaches a maximum at a pressure within the range from about 2000 to about 2500 psig.
- Assignee:
- Exxon Research And Engineering Co
- Patent Number(s):
- US 4347117
- OSTI ID:
- 6517241
- Resource Relation:
- Patent File Date: Filed date 3 Nov 1980; Other Information: PAT-APPL-203410
- Country of Publication:
- United States
- Language:
- English
Similar Records
EDS coal liquefaction process development. Phase IV. Quarterly technical progress report, January 1-March 31, 1980
Liquefaction process wherein solvents derived from the material liquefied and containing increased concentrations of donor species are employed
Related Subjects
COAL LIQUEFACTION
PETROLEUM RESIDUES
RECYCLING
SOLVENTS
HYDROGEN TRANSFER
BITUMINOUS COAL
HEATING
NAPHTHA
PRESSURIZING
SEPARATION PROCESSES
SUBBITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
COAL
COAL TAR OILS
DISTILLATES
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIQUEFACTION
MATERIALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction