Coal extraction process

Details Coal extraction process Coal extraction process

C - Chemistry, Metallurgy

10

G

196/12

C10G 1/04 (2006.01)

Patent

CA 1149303

COAL EXTRACTION PROCESS ABSTRACT OF THE DISCLOSURE: Sub-divided coal is extracted under non-thermally destructive conditions with a solvent liquid containing a compound having the general formula: Image where M is a carbon, sulfur, or phosphorus atom, R2 and R3 are each a hydrogen atom or a lower alkyl group, R and R1 are each a lower alkyl group, another Image group, a monocyclic aromatic group, or R1 can be another Image group or R1 and R2 together can represent the atoms necessary to close a heterocyclic ring, and n = 1 where M = phosphorus and is otherwise 0, to substantially remove the non-fixed carbon content of the coal, leaving a solid residue of the fixed coal carbon, ash and non-extractable matter.

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