Process for coal liquefaction in staged dissolvers

Details Process for coal liquefaction in staged dissolvers Process for coal liquefaction in staged dissolvers

1981-10-05

1983-12-20

Gantz, Delbert E.

Mineral oils: processes and products

Phenolic or toxic oils

C10G 100

Patent

active

044216300

ABSTRACT:
There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coal is slurried with a pasting oil, passed through a preheater and at least two dissolvers in series in the presence of hydrogen-rich gases at elevated temperatures and pressures. Solids, including mineral ash and unconverted coal macerals, are separated from the condensed reactor effluent. In accordance with the improved process, the first dissolver is operated at a higher temperature than the second dissolver. This temperature sequence produces improved product selectivity and permits the incorporation of sufficient hydrogen in the solvent for adequate recycle operations.

REFERENCES:
patent: 3583900 (1971-06-01), Gatsis
patent: 3884796 (1975-05-01), Hinderliter et al.
patent: 3892654 (1975-07-01), Wright et al.
patent: 4162956 (1979-07-01), Rhodes
patent: 4164466 (1979-08-01), Baldwin et al.
patent: 4222844 (1980-09-01), Nizanoff
patent: 4300996 (1981-11-01), Kuehler
patent: 4325800 (1982-04-01), Rosenthal et al.
patent: 4330389 (1982-05-01), Rosenthal et al.

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