Production of low sulfur heavy oil from coal

Details Production of low sulfur heavy oil from coal Production of low sulfur heavy oil from coal

1974-06-03

1976-05-04

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8, C10G 106

Patent

active

039545962

ABSTRACT:
A low sulfur content, heavy oil is produced from coal by direct hydrogenation at a temperature of about 820.degree. to 1000.degree.F and pressure of about 500 to 4000 psi in a pressurized closed cyclic system through which hydrogen is circulated. Coal, oxygen and steam are fed into the pressurized system and the heavy oil of low sulfur content is removed as the product. The pressurized system includes a gas reforming zone, in which hydrocarbon gases produced in the system are reformed with steam and oxygen to provide all or part of the hydrogen requirements of the process, and a coal hydrogenation zone which receives hydrogen-containing gases from the gas reforming zone along with pulverized coal from a pressure feeder. The product oil is separated from the oil and gas effluent of the hydrogenation zone and the resulting gases which contain most of the sulfur from the coal along with a controlled amount of gaseous hydrocarbons are then purified to remove sulfur and are recycled to the reforming zone to produce the hydrogen requirement without substantial reduction in system pressure. If desired, part of the hydrogen requirement may be supplied by feeding coal to the reforming zone along with the recycle gases.

REFERENCES:
patent: 2654661 (1953-10-01), Gorin
patent: 2756194 (1956-07-01), Mayland
patent: 2840462 (1958-06-01), Gorin
patent: 3075912 (1963-01-01), Eastman et al.
patent: 3527691 (1970-09-01), Hodgson
patent: 3551124 (1970-12-01), Iwaki et al.
patent: 3663420 (1972-05-01), Jacobs et al.
patent: 3729407 (1973-04-01), Camp et al.
patent: 3755137 (1973-08-01), Schuman
patent: 3840456 (1974-10-01), Yavorsky et al.

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