Mixture of oppositely charged filter aid material

Details Mixture of oppositely charged filter aid material Mixture of oppositely charged filter aid material

1977-09-27

1979-12-04

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

210504, 210505, 210508, B01D 3702

Patent

active

041771427

ABSTRACT:
Impurities are removed from a liquid by passing the liquid through an improved filter bed. The filter bed comprises a mixture of oppositely charged particles of filter aid material, the particles normally having a surface charge in aqueous solution. A portion of these particles are treated with a chemical compound to produce a surface charge that is opposite from the normal surface charge. These oppositely charged particles clump in aqueous suspension, and produce a filter bed which is capable of removing suspended particles with very high efficiency, while maintaining a relatively low pressure drop across the filter bed.

REFERENCES:
patent: 3242073 (1966-03-01), Guebert
patent: 3250702 (1966-05-01), Levendusky
patent: 3352424 (1967-11-01), Guebert
patent: 3600329 (1971-08-01), Enriquez
Balthazar, J., "Belgian Experience with Powdered Resin Filter," Trib Cebedeaux, Oct. 1969.
Balthazar, J., "Methodical Investigations of Continuous Condensate Purification with Powderesin Alluvial Filters," VGB Feed Water Convention, 1971.
Balthazar, J. "Ion Purification of Condensates by Powdered Resin Filters," Laborelec, Report NI1455.
Problems of Chemistry and Physics of Power Plants.
The Performance and Possibilities of Application of Filters Utilizing Powdered Ion Exchange Resins, Aug. 27, 1968.
Betz Handbook of Industrial Water Conditioning, 7th Edition, 1976, pp. 53-56.

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