Liquefaction of sub-bituminous coal

Patent · Tue Jun 24 00:00:00 EDT 1986

OSTI ID:5479617

Schindler, H D; Chen, J M

A process is described for the liquefaction of sub-bituminous coal, comprising: contacting sub-bituminous coal with a liquefaction solvent in a first stage thermal liquefaction zone; hydrogenating first stage product in a second stage with gaseous hydrogen, the second stage being operated at a temperature of no greater than 700/sup 0/F; recovering from the second stage a first stream of 850/sup 0/F- material, as net liquefaction product, and a second stream of a mixture of 850/sup 0/F- material and 850/sup 0/ F+ material; recovering a pumpable stream of insoluble material in 850/sup 0/F+ material from one of the first and second stage; and employing the pumpable stream and second stream for formulating liquefaction solvent for the first stage consisting essentially of from 5% to 10%, by weight, of insoluble material provided from one of the first and second stages, at least 45%, by weight, of 850/sup 0/F- material provided from the second stage without further hydrogenation, 0% to 20%, by weight, of 850/sup 0/F- material provided from the first stage without further hydrogenation, and the remainder of the liquefaction solvent being 850/sup 0/F+ material. The 850/sup 0/F+ material of the liquefaction solvent is provided in an amount of at least 20%, by weight, from the second stage without further hydrogenation and any remainder of the 850/sup 0/F+ material of the liquefaction solvent being provided from the first stage without further hydrogenation.

• Assignee: Lummus Crest, Inc., Bloomfield, NJ
• Patent Number(s): US 4596650
• OSTI ID: 5479617
• Resource Relation: Patent File Date: Filed date 16 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
ORGANIC SOLVENTS
COAL LIQUIDS
HYDROGENATION
HIGH TEMPERATURE
HYDROGEN
QUANTITY RATIO
SOLUBILITY
SUBBITUMINOUS COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
LIQUEFACTION
LIQUIDS
MATERIALS
NONMETALS
SOLVENTS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
010403 - Coal & Coal Products- Hydrogenation- (-1987)