Method of removing ash components from high-ash content coals

Patent · Tue Jul 11 04:00:00 EDT 1978

OSTI ID:6848477

Tippmer, K; Schmitt, H; Vinke, H; Abendroth, G

A method of removing ash components from coals, particularly high-ash content coals, comprises grinding the coal into ground particles and suspending the ground coals in an aqueous alkali carbonate solution. The solution is maintained in a reactor for 45 to 120 minutes at a temperature range of from 250 to 280/sup 0/C and under a pressure of from 50 to 80 atm in order to cause the CO/sub 2/ to be set free by dissociation. The CO/sub 2/ is discharged from the reactor by directing an inert gas stream through the reactor and discharging the CO/sub 2/ with the gas stream. The suspension is stirred and agitated at elevated temperatures and increased pressures in order to fuse the ashes. The aqueous solution containing the dissolved ash components is then separated from the coal. The removed carbon dioxide is introduced into a solution for reforming the alkali carbonate in order to cause the contents of the solution to become insoluble and separated and the alkali solution to become regenerated. The regenerated solution is then used to continue the operation by forming a further aqueous alkali carbonate solution and ground coal suspension.

• Assignee: TIC; EDB-79-016536; ERA-04-009401
• Patent Number(s): US 4099929
• OSTI ID: 6848477
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CARBONATES
CHALCOGENIDES
COAL
DEASHING
ENERGY SOURCES
FOSSIL FUELS
FUELS
MINERALS
OXIDES
OXYGEN COMPOUNDS
REGENERATION
REMOVAL