Process for liquefying coal or similar liquefiable carbonaceous solids in which the liquefaction solvent is a hydrotreated solvent mixture that is derived in the process. The solvent mixture comprises at least 78 wt. % decalin, comprising cis and trans decalin. The cis-isomers comprise at least 80 wt. % of the total weight of the decalin. The solvent mixture may also include about 0-2 wt. % of naphthalene, about 0-5 wt. % of a constituent comprising the mono and/or di methyl derivative of at least one of the other constituents in the mixture, and tetralin comprising the remainder, e.g., about 1-22 wt. %.
This invention generally relates to short residence time decomposition and volatilization of coal to produce liquid co-products, including petroleum substitutes and chemical feedstocks, while minimizing production of char and gas without utilization of external hydrogen, that is, hydrogen other than that contained in the coal feedstock. The invention more particularly relates to an improved partial coal liquefaction process for economically producing petroleum substitutes and chemical feedstocks from coal by a refining process employing short residence time vaporization and hydrogen conservation.
This invention generally relates to co-production of petroleum substitutes, chemical feedstocks and methanol, while minimizing production of char and gas without utilization of external hydrogen, that is, hydrogen other than that contained in the coal feedstock. The invention more particularly relates to an improved partial coal refining process for economically producing petroleum substitutes and chemical feedstocks and hot char from coal by a refining process employing short residence time vaporization and hydrogen conservation and subsequently gasifying the hot char to syngas for production of methanol.
Volatile, carbonaceous material is refined by hydrodisproportionation to produce a slate of co-products by heating the carbonaceous material in the presence of hydrogen donor rich reducing atmosphere and quenching the reaction vapor produced. The slate of co-products includes a fluidic, combustible non-polluting liquid/solid transportable fuel system derived in substantial part from said hydrodisproportionation.
This invention generally relates to short residence time decomposition and volatilization of coal to produce liquid co-products while minimizing production of char and gas without utilization of external hydrogen, that is, hydrogen other than that contained in the coal feedstock. The invention more particularly relates to an improved method of economically producing uniform, fluidic, oil-type transportable fuel systems and fuel compositions and a slate of "value-added" co-products by a coal refining process employing short residence time hydrodisproportionation (SRT-HDP).
Low rank coals, waste coals and peat are refined by hydrodisproportionation to produce a slate of co-products by heating these materials in the presence of hydrogen donor rich reducing atmosphere and quenching the reaction vapor produced. The slate of co-products includes a fluidic, combustible non-polluting liquid/solid transportable fuel system derived in substantial part from said hydrodisproportionation.
