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Pulverized coal is converted by means of a gaseous mixture and partial oxidation into synthesis gas which is subsequently utilized as a feedstock for the production of hydrocarbons. A gaseous mixture containing non-converted synthesis gas and low boiling hydrocarbons is separated from the higher boi

Pulverized coal is converted by means of a gaseous mixture and partial oxidation into synthesis gas which is subsequently utilized as a feedstock for the production of hydrocarbons. A gaseous mixture containing non-converted synthesis gas and low boiling hydrocarbons is separated from the higher boiling hydrocarbons and recycled to the coal conversion step.

대표청구항 ▼

A process for the preparation of hydrocarbons from coal comprising the following steps: (a) a finely comminuted coal is converted by gasification at a temperature from 1050°to 2000°C. in the presence of oxygen and steam into a gas mixture consisting substantially of carbon monoxide and hydrogen; (b)

A process for the preparation of hydrocarbons from coal comprising the following steps: (a) a finely comminuted coal is converted by gasification at a temperature from 1050°to 2000°C. in the presence of oxygen and steam into a gas mixture consisting substantially of carbon monoxide and hydrogen; (b) the gas mixture obtained in step (a) is partially converted into a aromatic hydrocarbon mixture with the use of a bifunctional crystalline silicate catalyst which (i) is capable of adsorbing more than 3% by weight of water at 25°C. and saturated water vapor pressure after dehydration at 400°C. in vacuo, and (ii) has, in the dehydrated form, the following gross composition, expressed in moles of the oxides: (1.0±0.3)(R)2/nO. a Fe2O3. b Al2O3. c Ga2O3. y(d SiO2+e GeO2), wherein R=one or more mono- or bivalent cations, a≥0.1, b≥0, c≥0, a+b+c=1, y≥10, d≥0.1, e≥0, d+e=1, and n=the valency of R, and (iii) which contains one or more metal components with catalytic activity for conversion of an H2/CO mixture into hydrocarbons and/or oxygen-containing hydrocarbons; (c) the product of step (b) is separated into a liquid containing hydrocarbon with at least 3 carbon atoms and a gas containing unconverted hydrogen, carbon monoxide, nitrogen and resultant hydrocarbon gases; and (d) at least a part of the gas product of step (c) is separated into (i) a gas consisting substantially of hydrogen, (ii) a gas consisting substantially of carbon monoxide, nitrogen and argon, and (iii) a gas consisting substantially of methane and ethane and wherein at least a part of gas (i) is recycled to step (b) and at least a part of gas (iii) is recycled to step (a).