Process of beneficiating coal and product

Patent · Tue Dec 08 00:00:00 EST 1981

OSTI ID:5833330

Burgess, L E; Fox, K M; McGarry, P E

Mine run coal is pulverized and the extended surfaces of the coal particles are rendered hydrophobic and oilophilic by a chemical bonding and graft polymerization reaction with a water unsoluble organic polymerizable monomer under peroxidation influence in a predominantly water reaction medium. The mineral ash present in the coal, particularly the iron pyrites, remains hydrophilic and is separated from the polymeric organic surface bonded coal product in a water washing step wherein the washed coal floats on and is recovered from the water phase and the ash is removed with the separated wash water in a critical wash step. The hydrophobic and oilophilic organic polymeric surface bonded coating about the coal particles is fortified by inclusion of additional unbound free fatty acids by further small additions thereof. Excess water is removed from the beneficiated hydrophobic surface-altered coal product mechanically, and the carboxylic acid groups present in the coal-oil product are thereafter converted to a metal soap. The beneficiated coal product can be used ''dry'', or additional quantities of a liquid hydrocarbon fuel can be incorporated with the ''dry'' beneficiated coal product to produce a flowable fluid or liquid coal product having the rheological property of marked thixotropy. Introduction of this physically induced property into the liquid coal-oil-mixture prevents settling out of the heavier coal particles from the relatively ash-free fluid fuel composition under extended storage periods.

• Assignee: Gulf and Western Industries Inc
• Patent Number(s): US 4304573
• OSTI ID: 5833330
• Resource Relation: Patent File Date: Filed date 22 Jan 1980; Other Information: PAT-APPL-114414
• Country of Publication: United States
• Language: English

Related Subjects

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OPTIMIZATION
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POLYMERS
SLURRIES
WATER REMOVAL
CARBONACEOUS MATERIALS
DISPERSIONS
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