Recovery of coal liquefaction catalysts

Details Recovery of coal liquefaction catalysts Recovery of coal liquefaction catalysts

C - Chemistry, Metallurgy

10

G

196/5.3

C10G 1/08 (2006.01)

Patent

CA 1185200

ABSTRACT OF THE DISCLOSURE Metal constituents are recovered from the heavy bottoms produced during the liquefaction of coal and similar carbonaceous solids in the presence of a catalyst containing a metal capable of forming an acidic oxide by burning the heavy bottoms in a combustion zone at a temperature below the fusion temperature of the ash to convert insoluble metal-containing catalyst residues in the bottoms into soluble metal-containing oxides; contact- ing the oxidized solids with an aqueous solution of a basic alkali metal salt to extract the soluble metal- containing oxides in the form of soluble alkali metal salts of the metal-containing oxides and recycling the soluble alkali metal salts to the liquefaction zone. In a preferred embodiment of the invention, the bottoms are subjected to partial oxidation, pyrolysis, coking, gasi- fication, extraction or a similar treatment process to recover hydrocarbon liquids and/or gases prior to the burning or combustion step.

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