Mitsui Coke Co. Ltd.

Mitsui Mining Co., Ltd.

Mitsui-kozan Coking Industry Co., Ltd.

Shoichi Oi

Noriaki Ohnishi

Tadanobu Takata

Shinya Mori

Isao Kubo

Tetsuo Wada

Tadashi Komiyama

Shigemi Nagayoshi

Futao Sakata

Keiichiro Koba

Disclosed is a process for the liquefaction of coal in which a slurry composed of the coal, a solvent, and an iron ore consisting mainly of a hydrate of iron oxide is heated under an elevated pressure of hydrogen.

Process for the liquefaction of coal

In a process wherein a slurry of water-containing coal and a solvent is heated to 100.degree.-350.degree. C. and then subjected to vapor-liquid separation by which water vapor is separated from the slurry to obtain a dehydrated slurry, a slurry to be dehydrated is mixed with a part of the dehydrated slurry and then heated. The dehydrated slurry thus obtained is suitable for use as a starting material for the hydrogenolysis of coal.

Process for the dehydration and liquefaction of water-containing coal

Disclosed is a process for the treatment of water-containing coal which comprises mixing the water-containing coal with a hydrocarbon oil having a specific gravity higher than that of water at temperatures in the range of 100.degree. to 350.degree. C.; heating the resulting mixture at a temperature in the range of 100.degree. to 350.degree. C. and a pressure not lower than the saturated vapor pressure of water at that temperature; and then allowing the heated mixture to settle at a temperature in the range of 100.degree. to 350.degree. C. and a pressure not lower than the saturated vapor pressure of water at that temperature, whereby an upper layer consisting of the water separated from the water-containing coal is formed on a lower layer consisting of the mixture of the dehydrated coal and the hydrocarbon oil.

Treatment of water-containing coal

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Ohmuta, Japan

Shoichi Oi