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US Department of Energy
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US Department of Energy
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Publication of CA1180294ApublicationCriticalpatent/CA1180294A/fr
Process for increasing the fuel yield of coal liquefaction products by extraction of asphaltenes, resins and aromatic compounds from said coal liquefaction products
Process for selective recovery of relatively metals-free bitumen from tar sand using a halogenated aliphatic solvent in combination with a second solvent