Method for improving the sedimentation and filterability of coal

Details Method for improving the sedimentation and filterability of coal Method for improving the sedimentation and filterability of coal

1977-08-04

1979-01-02

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

21 56, 208 11LE, 208265, 208266, B01D 2101

Patent

active

041326393

ABSTRACT:
An improvement in the separation of suspended solids from coal-derived liquids by a separations process in which solids size is a separations parameter is achieved by contacting the coal-derived liquid containing suspended solids with an effective amount of an additive selected from the group of sulfuric acid, phosphoric acid, phosphoric anhydride and salts of sulfuric and phosphoric acid, and maintaining the contacted liquid at a temperature within the range of about 150.degree.-400.degree. C and for a time sufficient to achieve the desired separation rate.

REFERENCES:
patent: 3084118 (1963-04-01), Overholt et al.
patent: 3151054 (1964-09-01), Layng
patent: 3232861 (1966-02-01), Gorin et al.
patent: 3607720 (1971-09-01), Paulson
patent: 3748254 (1973-07-01), Gorin
patent: 3816305 (1974-06-01), Schutte
patent: 3846276 (1974-11-01), Walker

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