Process for dewatering carbonaceous materials
AssigneeTexaco Inc.
InventorsEdward L. Cole, Howard V. Hess, William F. Franz
Life of this patent
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Abstract
Water is removed from carbonaceous materials such as coal by treatment with a hydrocarbon at elevated temperatures and a pressure sufficiently high to maintain the system liquid.
Claims5
A process for the transportation and subsequent dewatering of a solid carbonaceous material which comprises grinding said material to particles capable of passing through an 8 mesh sieve, slurrying the resulting particulate material with water, passing the slurry through a pipeline and then separating the slurry into water and water-wet particles by pumping the slurry to a dewatering screen belt, air-blowing the water-wet particles, mixing said air-blown water-wet particles with a hydrocarbon liquid in an amount between 20 and 500 weight percent basis particulate material, heating the mixture to a temperature between 300.degree. and 705.degree. F. at a pressure between 100 and 3500 psig sufficient to maintain the hydrocarbon and water in the liquid phase and then recovering oil-wet but substantially waterfree solid carbonaceous particles from the mixture.
Dependencies are inferred from the claim text.