Hydrothermal pretreatment to prevent scale during liquefaction o

Details Hydrothermal pretreatment to prevent scale during liquefaction o Hydrothermal pretreatment to prevent scale during liquefaction o

1982-11-08

1984-05-22

Gantz, Delbert E.

Mineral oils: processes and products

Phenolic or toxic oils

C10G 100

Patent

active

044500661

ABSTRACT:
Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by hydrothermal pretreatment. The said pretreatment is believed to convert the scale-forming components to the corresponding carbonate prior to liquefaction. The said pretreatment is accomplished at a total pressure within the range from about 1000 to about 4400 psia. Temperature during said pretreatment will generally be within the range from about 500.degree. to about 700.degree. F.

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patent: 3660269 (1972-05-01), McCauley
patent: 4304655 (1981-12-01), Poddar
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patent: 4351716 (1982-09-01), Gorboty et al.
Chemical Rubber Co., Handbook 1971-1972 Ed. D-149.

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