Coal deashing process having improved solvent recovery...

Details Coal deashing process having improved solvent recovery... Coal deashing process having improved solvent recovery...

C - Chemistry, Metallurgy

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C10G 1/06 (2006.01) C10G 1/00 (2006.01) C10G 1/04 (2006.01) C10L 9/02 (2006.01)

Patent

CA 1092045

A COAL DEASHING PROCESS HAVING IMPROVED SOLVENT RECOVERY TECHNIQUES Abstract of Disclosure An improved coal deashing process wherein coal is mixed with a first dissolving solvent, solubilized and flashed to provide a prepared mixture, and the prepared mixture is mixed with a second dissolving solvent to produce a feed mixture. The insoluble coal products produced are separated from the feed mixture as a first heavy fraction in a first separation zone and the soluble coal products are recovered as a second heavy fraction from a second separation zone. The second dissolving solvent is recovered from the first heavy fraction and the second heavy fraction for recycling to aid in the production of the feed mixture. The first dissolving solvent is recovered from the first and the second heavy fractions and recycled to aid in solubilization of the coal.

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