Mineral oils: processes and products – Products and compositions – Lubricating oils
Patent
1974-11-29
1976-08-24
Gantz, Delbert E.
Mineral oils: processes and products
Products and compositions
Lubricating oils
208251H, 210222, C10G 106, C10G 3400
Patent
active
039765571
ABSTRACT:
The removal of particulate solids containing iron sulfides from hydrogenated coal liquids by magnetic separation is improved by pretreatment of the liquid with a gas mixture containing hydrogen and hydrogen sulfide. The coal-derived liquid is contacted with the gas mixture containing at least about 2 vol. % hydrogen sulfide, with the remainder of the gas mixture comprising principally hydrogen. Residue time for the liquid-gas contact should be at least about two minutes and temperature should be less than about 650.degree.F. The treated liquid is then passed through a magnetic field having strength of at least about 3000 gauss to achieve substantial removal of sulfur-containing solids from the liquid. The magnetic solids are then removed from the separator unit, e.g., by flushing using a light solvent oil, and the remaining liquid fraction carrying less-magnetic solids is passed on to further processing.
REFERENCES:
patent: 1512870 (1924-10-01), Ullrich et al.
patent: 2607492 (1952-08-01), Anders
patent: 2998882 (1961-09-01), Leeman
patent: 3463310 (1969-08-01), Ergun et al.
patent: 3725241 (1973-04-01), Chervenak
Chervenak Michael C.
Shen John
Gantz Delbert E.
Hellwege James W.
Hydrocarbon Research Inc.
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