The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1985
Filed:
Jul. 19, 1983
Joseph G Savins, Dallas, TX (US);
Mobil Oil Corporation, New York, NY (US);
Abstract
A method for removing the ash mineral matter content of coal and transporting the ash free coal from the point of ash removal to a coal use point comprising grinding run-of-mine coal to a desired particle size, mixing the coal particles with water and liquid carbon dioxide in a vessel in a swirling, fluidized state at a pressure, temperature, and for a residence time sufficient to free substantially all of the ash mineral matter from the coal and form an ash free coal/mineral matter slurry, separating the ash free coal particles from the slurry by froth floatation, drying the ash free coal particles, forming a slurry of the ash free coal particles with liquid carbon dioxide, transporting the ash free coal/liquid carbon dioxide slurry by pipeline to a coal use point, deslurrying the ash free coal/liquid carbon dioxide slurry, recovering the ash free coal particles for intended use and recycling the coal-free liquid carbon dioxide recovered from deslurrying for treating additional coal in the ash removal step.