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In order to produce ashless coal (HyperCoal) in a high-yield, thermal extraction with several organic solvents under hot filtration at 360 o C using a flow-type extractor was performed, and the effect of the extraction solvent on the extraction yield and ash content in the HyperCoal was investigated. Crude methylnaphthalene oil (CMNO), a cost-effective industrial solvent, gives much higher...
Methanol-mediated extraction, which the authors have developed, was conducted on the naphtha fraction derived from Wyoming coal. When 0.4-1.5 times methanol was added to the feed oil, the mixture formed a two-phase system. The extraction yield of phenol ranged from 86.3% to 99.2% and that of oil fraction ranged from 65.5% to 91.0%. This indicates that the extraction of phenol by methanol only was...
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