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:
Aug. 18, 1987
Filed:
Mar. 10, 1986
Harley L Heaton, III, Alexandria, VA (US);
Joseph H Lippold, Jr, Alexandria, VA (US);
Edward T McHale, Alexandria, VA (US);
Edward G Skolnik, Alexandria, VA (US);
Atlantic Research Corporation, Alexandria, VA (US);
Abstract
According to the present invention there is provided a process for producing a low viscosity, stable coal-water fuel slurry by controlling the concentration of soluble inorganic salts in the coal-water fuel slurry. The process of the present invention comprises determining the soluble ion content of a coal; treating the coal to control the soluble ion content thereof by removing soluble ions from the coal or adding a soluble inorganic salt or electrolyte to the coal; and admixing the coal with a dispersant, a base and water to produce a coal-water fuel slurry comprising 60-75% by weight coal and having a total hardness of 100 ppmc to 1000 ppmc, preferably 200 ppmc to 600 ppmc, expressed as Ca.sup.2+ ion concentration.