Method for removing suspended impurities

Details Method for removing suspended impurities Method for removing suspended impurities

1993-12-15

1995-07-11

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210777, C02F 142

Patent

active

054318246

ABSTRACT:
The improved organic polymeric adsorbent is used to adsorb and remove suspended impurities present in trace amounts in the water being treated in an apparatus for producing ultrapure water for use in the semiconductor industry or in a condensate purifier in steam power generating facilities and it is composed of a particulate or powdered cation exchange resin and/or anion exchange resin. The improvement is that this adsorbent has such a surface layer structure and morphology that granules are seen to bind with one another when examined under a scanning electron microscope in a field of view ranging from a magnification of 50 to 200,000. The adsorbent may be used as the constituent of a packing layer and/or a filter layer to make a material for removing suspended impurities.

REFERENCES:
patent: 3250704 (1966-05-01), Levendusky
patent: 4200695 (1980-04-01), Chong et al.
patent: 4419245 (1983-12-01), Barrett et al.
patent: 4564644 (1986-01-01), Harris
Izumi et al., "Crud Removal Characteristics of Newly Developed Ion Exchange Resins (Second Report)", 52nd Annual Mtg of Int'l. Water Conf. Pittsburgh, Pa. Oct. 21-23, 1991.

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