Method for removing ash mineral matter of coal with liquid carbon dioxide and water

Patent · Tue Jun 11 04:00:00 EDT 1985

OSTI ID:6418017

Savins, J G

A method for removing the ash mineral matter content of coal and transporting the ash free coal from the point of ash removal to a coal use point comprising grinding run-of-mine coal to a desired particle size, mixing the coal particles with water and liquid carbon dioxide in a vessel in a swirling, fluidized state at a pressure, temperature, and for a residence time sufficient to free substantially all of the ash mineral matter from the coal and form an ash free coal/mineral matter slurry, separating the ash free coal particles from the slurry by forth flotation, drying the ash free coal particles, forming a slurry of the ash free coal particles with liquid carbon dioxide, transporting the ash free coal/liquid carbon dioxide slurry by pipeline to a coal use point, deslurrying the ash free coal/liquid carbon dioxide slurry, recovering the ash free coal particles for intended use and recycling the coal-free liquid carbon dioxide recovered from deslurrying for treating additional coal in the ash removal step.

• Assignee: Mobil Oil Corp.
• Patent Number(s): US 4522628
• OSTI ID: 6418017
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ASHES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COAL PREPARATION
COMMINUTION
DEASHING
DEMINERALIZATION
DEMINERALIZERS
DISPERSIONS
DRYING
ENERGY SOURCES
FLOTATION
FLUIDS
FOSSIL FUELS
FREIGHT PIPELINES
FUELS
GRINDING
HYDROGEN COMPOUNDS
LIQUIDS
MACHINING
MATERIALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PIPELINES
RECYCLING
RESIDUES
SEPARATION PROCESSES
SLURRIES
SLURRY PIPELINES
SUSPENSIONS
TRANSPORT
WATER