Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1990-05-11
1991-08-13
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210668, 210669, 210683, C02F 900
Patent
active
050394231
ABSTRACT:
Provided is a process for the disinfection of raw water with chlorine dioxide and the removal of virtually all disinfection by-products. The process comprises contacting the water to be purified with a sufficient amount of gaseous chlorine dioxide to kill any microorganisms and thereby disinfect the water. The water is then stripped with air to remove ClO.sub.2 and any organic chemicals, with the resulting water then being contacted with a strong anion exchange resin to remove any by-products such as chlorite and chlorate ions formed in the disinfection process. The integrated process efficiently and effectively provides a water product which can contain essentially no chlorine dioxide, chlorite ions, chlorate ions or trihalomethanes, and which also is fully disinfected.
REFERENCES:
patent: 3733266 (1973-05-01), Bishop et al.
patent: 3779909 (1973-12-01), Wisfeld et al.
Cintins Ivars
International Dioxcide, Inc.
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