C - Chemistry – Metallurgy – 10 – L
Patent
C - Chemistry, Metallurgy
10
L
44/1, 209/3
C10L 1/32 (2006.01) B03B 9/00 (2006.01) B03D 1/00 (2006.01) B03D 3/06 (2006.01) C10L 9/00 (2006.01) C10L 9/10 (2006.01)
Patent
CA 1133700
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 oleophilic in a chemical graft polymerization reaction wherein a polymerizable organic monomer is utilized to render the particulate coal hydrophobic and oleophilic. The reaction occurs in an aqueous medium in the presence of free radical polymeric catalysts 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 unwanted 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 mechanical 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 provided to stabilize the coal- oil mixture. The resultant coal-oil mixture is beneficiated and stable for extended periods of time.
367579
Burgess Lester E.
Fox Karl M.
Mcgarry Phillip E.
Gulf & Western Industries Inc.
Macrae & Co.
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