Process for coal liquefaction in staged dissolvers

Patent · Tue Dec 20 04:00:00 EST 1983

OSTI ID:5000089

Roberts, G W; Givens, N; Skinner, R W

An improved liquefaction process is claimed by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.

• Assignee: International Coal Refining Co., Allentown, Pa.
• Patent Number(s): US 4421630
• OSTI ID: 5000089
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ASHES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL
COAL LIQUEFACTION
CONTROL
DEASHING
DESULFURIZATION
DISPERSIONS
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUEL SLURRIES
FUELS
HEAT TREATMENTS
HYDROGENATION
LIQUEFACTION
MACERALS
MATERIALS
MIXTURES
ORGANIC SOLVENTS
RECYCLING
REMOVAL
RESIDUES
SLURRIES
SOLVENT-REFINED COAL
SOLVENTS
SULFUR CONTENT
SUSPENSIONS
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
TSL PROCESS