Ion exchange resin having dual morphology

Details Ion exchange resin having dual morphology Ion exchange resin having dual morphology

1993-09-01

1995-04-04

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210685, 210686, 210692, 210777, C02F 142

Patent

active

054034922

ABSTRACT:
The invention provides a method for removing metal oxides and colloidal material from high-resistivity water streams at a relatively high removal efficiency. The method includes hydrating a highly ionized dual morphology ion exchange resin in a macroreticular, desiccated morphology to produce a macroreticular, hydrated morphology. A water stream which is brought into contact with the resin is purified. The water stream may, optionally, also be contacted with both a cation exchange resin and an anion exchange resin.
The invention additionally provides a method for selecting ion exchange resins which are particularly suited for use in removing metal oxides from a condensate stream. The method serves to narrow the field of candidates for pilot-scale resin testing with industrial water streams.

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R. Kunin, "Ion Exchange Resins,", pp. 46-47, 98-99 (1958).
Liu et al., "Hope Creek Deep Bed Filtration Pilot Testing,", Paper Delivered at Electric Power Research Institute Conference, pp. 6-7 (Sep. 1991).
T. Izumi et al., "Crud Removal Characteristics of Newly Developed Ion Exchange Resins," 52nd Annual Meeting of International Water Conference, Paper No. IWC-91-57 (Oct. 1991).
R. Kunin, "Two Decades of Macroreticular Ion Exchange Resins," Published Article Appearing in Amber-Hi-Lites Issue 161, Spring, 1979.
T. Izumi et al., "Crud Removal Characteristics of Newly Developed Ion Exchange Resins," 50th Anniversary Meeting International Water Conference, Paper No. IWC-89-52 (Oct. 1989).
I. Inami et al., "Mechanism of Crud Removal By Deep Bed Resins," 50th Anniversary Meeting of International Water Conference, Paper No. IWC-89-51 (Oct. 1989).
R. Bijeo, "Dowex.RTM. Resins-BWR Condensate Polishing," Paper Delivered at Electric Power Research Institute Conference (Jan. 1991).
Sales Literature, "Dowex Marathon C Cation Resin," Believed to Have Been Distributed by the Dow Chemical Company, Circa 1991.
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