Process for direct liquefaction of coal

Details Process for direct liquefaction of coal Process for direct liquefaction of coal

1981-05-08

1983-05-17

Hearn, Brian E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 106

Patent

active

043839118

ABSTRACT:
A process for directly liquefying coal in a reactor including a preheating section and a reaction section, each having a plurality of pressure-resistant vertical pipes, comprises introducing into the preheating section a paste consisting of finely divided coal, catalyst and heavy oil. In the preheating section the paste is heated to a temperature of 380.degree. to 410.degree. C. and preheated hydrogen is blown into each pipe to create a velocity of Reynolds number equal to at least 3.times.10.sup.3 and an axial dispersion coefficient of not more than 0.05. The preheated paste and hydrogen are forwarded to the reaction section where they are heated to a temperature of 400.degree. to 500.degree. C. and further hydrogen is introduced into each pipe of the reaction section to maintain the velocity and axial dispersion values and a high partial pressure of hydrogen. The total quantity of hydrogen introduced is 1 to 3 times the stoichiometric value.

REFERENCES:
patent: 1949109 (1934-02-01), Pier
patent: 1990708 (1935-02-01), Pier
patent: 1994075 (1935-03-01), Krauch
patent: 2100354 (1937-11-01), Pier
patent: 2913388 (1959-11-01), Howell
patent: 3644192 (1972-02-01), Li
patent: 4211631 (1980-07-01), Carr
Kastens et al., "Liquid Fuel from Coal", Industrial and Engineering Chemistry, May, 1949, pp. 870-885.
Morgan et al., "Hydrogenation of Coal and Coal-Tar Oils under Turbulent Flow Conditions", May, 1938, pp. 152-162.

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