Hydrogenation of coal. [7 claims]

Patent · Tue Jul 19 04:00:00 EDT 1977

OSTI ID:7303671

Martin, T G

The present invention relates to a process for the hydrogenative extraction of coal which comprises extracting finely divided coal at an elevated temperature between 340/sup 0/ and 480/sup 0/C with a gaseous solvent and a hydrogen donor, which solvent at the extraction temperature is above its critical temperature, separating the gas phase extract from the solids residue when extraction has been completed and thereafter condensing the extracted products from the gaseous or vapor phase. The coal is preferably finely divided such that 90 percent of the coal particles pass through a 1.5 mm mesh screen. The solvent may comprise a number of utilizable solvent components and the solvent selected such that the sum of the reduced partial pressures of the utilizable solvent components is greater than 1 at the extraction temperature.

• Assignee: Coal Industry (Patents) Ltd.
• Patent Number(s): US 4036731
• OSTI ID: 7303671
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
010407 -- Coal & Coal Products-- Solvent Extraction-- (-1987)
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COAL
COAL FINES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROGENATION
PARTICLE SIZE
SEPARATION PROCESSES
SIZE
SOLVENT EXTRACTION