Method of increasing the oil yield from hydrogenation of coal

Details Method of increasing the oil yield from hydrogenation of coal Method of increasing the oil yield from hydrogenation of coal

1981-10-07

1984-08-07

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

208 8LE, C10G 106

Patent

active

044642458

ABSTRACT:
The overall yield from hydrogenation of coal is increased by following the method of the present invention according to which additional amounts of oil are released from the separated residue obtained in a vacuum distillation operation following the initial coal hydrogenation, in that a light oil fraction obtained during the initial coal hydrogenation and having a boiling point in the range between 35.degree. and 200.degree. C. is added to the residue to act as a solvent therefor, whereupon the solution is hydrogenated at a temperature in the range between 350.degree. and 450.degree. C. under a hydrogen pressure of 300 to 400 bar for 0.5 to 2 hours. The solvent advantageously includes alkanes, cycloalkanes, aromatics, phenols or mixtures thereof having their boiling points within the above range. A catalyst selected from the series of transition metals may be added to further increase the oil yield from the hydrogenation of the residue.

REFERENCES:
patent: 3488279 (1970-01-01), Schulman
patent: 3583900 (1971-06-01), Gatsis
patent: 3640816 (1972-02-01), Bull et al.
patent: 4089772 (1978-05-01), Gorbaty et al.
patent: 4105535 (1978-08-01), Peters
patent: 4148709 (1979-04-01), Sze
patent: 4189371 (1980-02-01), Maa et al.
patent: 4251346 (1981-02-01), Dry et al.
patent: 4318797 (1982-03-01), Jager et al.

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