Method of increasing the oil yield from hydrogenation of coal

Patent · Tue Aug 07 04:00:00 EDT 1984

OSTI ID:6440070

Hodek, W

The overall yield from hydrogenation of coal is increased by following the method of the present invention according to which additional amounts of oil are released from the separated residue obtained in a vacuum distillation operation following the initial coal hydrogenation, in that a light oil fraction obtained during the initial coal hydrogenation and having a boiling point in the range between 35/sup 0/ and 200/sup 0/ C is added to the residue to act as a solvent therefor, whereupon the solution is hydrogenated at a temperature in the range between 350/sup 0/ and 450/sup 0/ C under a hydrogen pressure of 300 to 400 bar for 0.5 to 2 hours. The solvent advantageously includes alkanes, cycloalkanes, aromatics, phenols or mixtures thereof having their boiling points within the above range. A catalyst selected from the series of transition metals may be added to further increase the oil yield from the hydrogenation of the residue.

• Assignee: Bergwerksverband GmbH (Germany, Federal Republic Of)
• Patent Number(s): US 4464245
• OSTI ID: 6440070
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010403* -- Coal & Coal Products-- Hydrogenation-- (-1987)
ALKANES
AROMATICS
CARBONACEOUS MATERIALS
CATALYSTS
CHEMICAL REACTIONS
COAL
CONTROL
CYCLOALKANES
DISTILLATION
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
HYDROXY COMPOUNDS
MATERIALS
METALS
OIL YIELDS
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PHENOLS
PROCESS CONTROL
SEPARATION PROCESSES
TRANSITION ELEMENTS
VACUUM SYSTEMS
YIELDS