Filtration

Details Filtration Filtration

1980-12-15

1981-11-17

Adee, John

Liquid purification or separation

Processes

Separating

210193, B01D 3702

Patent

active

043010156

ABSTRACT:
In the extraction of coal using a liquid solvent oil, filtration can be assisted by using a filter aid which is of coal origin. The filter aid is produced by high temperature processing of coal or an ash-rich coal-derived residue under conditions at which the ash component of the coal or residue does not fuse. A preferred starting material is filter cake from a coal extraction process.

REFERENCES:
patent: 4046690 (1977-09-01), Rongers
patent: 4157305 (1979-06-01), Muller

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