Coal treatment method and product produced therefrom
AssigneeBrown Coal Corporation
InventorsGeorge E. Brown, Jr., Bruce N. Hoppert
Life of this patent
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Abstract
Disclosed herein is a method for treating raw coal with ozone in aqueous suspension to modify the surface of the coal particle and release the ash constituents thereby permitting a more thorough separation of coal from ash by conventional means. The process also provides a mixture which is easily dewatered.
Claims13
In a process for treating crushed coal to remove sulfur and ash therefrom, wherein an agitated coal-water mixture is prepared on the basis of a solids content of about 10 to 40% by weight and ash and sulfur are subsequently removed by mechanical separation the improvement that comprises introducing into said mixture about 1/10 to 5 pounds of ozone per ton of coal and continuing to agitate said mixture for about 5 to 30 minutes.
A process for removing sulfur and ash from coal comprising:
- crushing the coal to a size of about 1/2 inch and less;
- adding water to the crushed coal so as to provide a coal-water mixture having a solids content of about 10 to 40% by weight;
- agitating said mixture;
- contacting said mixture with ozone in an amount of about 1/10 to 5 pounds of ozone per ton of coal for about 5 to 30 mintues;
- separating coal and ash from said mixture.
A process for improving the hydrophobic properties of a coal-water mixture consisting essentially of treating the coal-water mixture with ozone in an amount of about 1/10 to 5 pounds of ozone.
Dependencies are inferred from the claim text.