Process for beneficiating coal

Details Process for beneficiating coal Process for beneficiating coal

B - Operations, Transporting

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B

44/1, 209/3

B03B 5/00 (2006.01) B03B 7/00 (2006.01) B03B 9/00 (2006.01) B03D 1/00 (2006.01) B03D 3/06 (2006.01) C10L 9/10 (2006.01)

Patent

CA 1142134

UNITED STATES PATENT APPLICATION OF : LESTER E. BURGESS, KARL M. FOX, PHILLIP E. MCGARRY and DAVID E. HERMAN FOR: IMPROVED PROCESS FOR BENEFICIATING COAL ABSTRACT OF THE DISCLOSURE Beneficiated coal and a process for beneficiating coal are provided. Mined coal is pulverized in the presence of water to form a particulate coal aqueous stream. The extended surfaces of the particulate coal are rendered hydrophobic and oilophilic (oil loving) in a chemical graft polymerization reaction wherein a polymerizable organic monomer is utilized to render the parti- culate coal hydrophobic and oilophilic. The reaction occurs in an aqueous medium in the presence of free radical polymeric cata- lysts and initiators and a fuel oil. Mineral ash and sulfur normally present in the coal are separated from the treated coal in a water washing step. The un- wanted impurities are removed in a water stream. The chemical treatment and the washing step can be effected in a unitary operation. The recovered coal particles can be dried to remove excess water. Such drying can be effected using simple mechani- cal dryers. The beneficiated particulate coal can be burned as a fuel, or it can be admixed with oil to form a coal-oil mixture. A salt forming compound and a chemical treatment step are pro- vided to stabilize the coal-oil mixture. The resultant coal-oil mixture is beneficiated and stable for extended periods of time.

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