Mineral oils: processes and products – Phenolic or toxic oils
Patent
1982-02-10
1983-10-25
Gantz, Delbert E.
Mineral oils: processes and products
Phenolic or toxic oils
C10G 100
Patent
active
044117655
ABSTRACT:
An economical method for liquefying low rank coal is proposed. The method comprises steps of providing water-coal slurry by mixing crushed coal with water, heating the slurry under a pressure to a temperature which is lower than the saturated temperature under the pressure to thereby remove water from the coal with a result that coal content in the slurry be decreased, separating liquid in the slurry from solids, performing heat exchange between the separated liquid and the said pressurized water-coal slurry, then mixing the liquid with crushed coal to provide a further water-coal slurry, mixing the separated solids with a solvent to provide a fluid, evaporating water contents in the fluid, cooling the evaporated water to thereby condense it so as to recover volatile material, heating and pressurizing residual part of the fluid to a temperature and pressure suitable for liquefaction reaction with addition of hydrogen to obtain a liquefaction reactant then subjecting the reactant to a heat exchange with the water-coal slurry to cool the reactant to a temperature suitable for distillation, recirculating at least a part of the liquefaction reactant so that it is used at least a part of the solvent.
REFERENCES:
patent: 3764547 (1973-10-01), Schlinger et al.
patent: 4101413 (1978-07-01), Jones
patent: 4125452 (1978-11-01), Effron
patent: 4313819 (1982-02-01), Rado
Kamei Takao
Komai Keiichi
Kurihara Michio
Matsuura Yoshio
Nakamura Akira
Electric Power Development Co.
Gantz Delbert E.
Kawasaki Kabushiki Kaisha
Wright William G.
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