Mitsui Coke Co. Ltd.

Mitsui Mining Co., Ltd.

Toshikatsu Ohtsubo

Hisashi Murakami

Kenji Fukuda

Noriaki Ohnishi

Hidehiko Sugimura

Coal is dissolved in a hydrocarbon solvent, heated and purged of insolubles to form various types of solvent purified coal having different degrees of depolymerization. These various types of solvent purified coal are then coked to yield a variety of green coke products. The solvent purified coal is useful as a raw material for needle-like green coke when the value of its (N+O+S)/C atomic ratio is less than 0.0445; for coarse mosaic green coke when the value is in the range of from 0.0445 to but excluding 0.0516; for mosaic green coke when the value is in the range of from 0.0516 to but excluding 0.0584; for fine mosaic green coke when the value is in the range of from 0.0584 to but excluding 0.0645; and for glassy green coke when the value is equal to or greater than 0.0645.

Preparation of carbonaceous products

A process is disclosed for the production of solvent-refined coal useful as a starting material for micromosaic carbonaceous products and having an O/C atomic ratio of 0.040 to &lt;0.046, or useful as a starting material for coarse mosaic carbonaceous products and having an O/C atomic ratio of 0.030 to &lt;0.040 or useful as a starting material for needle like carbonaceous products and having an O/C atomic ratio of less than 0.030. The process comprises dissolving in a hydrocarbon solvent a coal intrinsically having an O/C atomic ratio of 0.030 to &lt;0.055 or a coal pretreated with a solvent, under hydrogen pressure, so as to have an O/C atomic ratio of 0.030 to &lt;0.055, and heating the resultant coal solution under a pressure of hydrogen for a period of time sufficient to form said solvent-refined coal.

Process for the production of solvent-refined coal useful as starting

Process for manufacturing reformed coal which comprises the steps of (a) dispersing coal into a mixed oil which is comprised of a coal oil having a boiling point between about 150.degree. C. and 500.degree. C. and a petroleum oil having a boiling point higher than that of kerosene; (b) subjecting the coal and oil dispersion to hydrogenation conditions sufficient to depolymerize the coal; (c) separating a substantially liquified coal solution from the product of hydrogenation, and (d) distilling the liquified coal solution to recover a reformed coal. Preferably, a portion of the coal oil is recycled from the distillation stage and a portion of the hydrogen needed for hydrogenation is produced from light fractions from the distillation stage.

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Kamishirakawa, Japan

Toshikatsu Ohtsubo