Process for regenerating clogged filters

Details Process for regenerating clogged filters Process for regenerating clogged filters

1992-08-07

1993-08-31

Dawson, Robert A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210106, 210791, 210785, B01D 2446

Patent

active

052406130

ABSTRACT:
When preparing carbon artefacts from heavy oils of petroleum or coal origin, removal of undesirable components or recovery of desirable components from raw materials or intermediates is usually required so as to improve the quality of the final products. Such removal or recovery operation is conventionally done by filtration. In the past, regeneration of filters clogged with solid carbonaceous materials inevitably formed by the filtration operations is difficult and troublesome procedures. Herein disclosed is a simple and effective process for regenerating filters clogged with solid carboneceous materials, characterized by treating the filter medium in an aqueous solution of hydrogen peroxide with heating and then optionally conducting ultrasonic washing in water or a solvent. By this simple process, clogged filters can be regenerated completely to show the same filtration performance as new filters.

REFERENCES:
patent: 2101012 (1937-04-01), Pond et al.
patent: 4740308 (1988-04-01), Fremont et al.
patent: 4844809 (1989-07-01), Ashina et al.
patent: 4865752 (1989-09-01), Jacobs
Soviet Inventions Illustrated, Section Ch, Week 8406, Derwent Publications, Ltd., London GB; Class J01, AN 84-035471 and SU-A1 007 702 (V. P. Zuev) Mar. 30, 1983.

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