Liquid purification or separation – Processes – Chemical treatment
Patent
1996-07-11
1997-09-02
McCarthy, Neil
Liquid purification or separation
Processes
Chemical treatment
210764, 210753, 210663, 210911, 210912, 210914, C02F 150
Patent
active
056628080
ABSTRACT:
Disclosed is a process for disinfecting water which provides a visual indication after the disinfection is complete. First, the water to be disinfected is generally simultaneously intermixed with at least three items. The items are: (1) a disinfectant which is adapted to render harmless substantially all pathogens present in the water upon the disinfectant being intermixed with the water for a time period T.sub.k ; (2) a colorant; and (3) a material which can remove substantially all of the disinfectant and colorant from the water over a time period T.sub.r, where T.sub.r is greater than T.sub.k. Secondly, the water, disinfectant, colorant and the removing material are allowed to remain intermixed for a time period of T.sub.r or greater. At the end of the time period T.sub.r, substantially all pathogens in the water will be rendered harmless, substantially all of the disinfectant will be removed from the water and substantially all of the colorant will be removed from the water. As a result of the removal of the colorant, the water will become uncolored which will give the consumer a visual indication after the disinfection process is complete and the water is safe to drink. Articles for use in carrying out the process are also disclosed.
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Skoog, West & Holler, Fundamentals of Analytical Chemistry, 5th ed., Saunders College Publishing, Fort Worth, TX, 1988, p. 780.
Blaney Carol Ann
Kaylor Rosann Marie
Kiick-Fischer Kristi Lynn
Harps Joseph P.
Kimberly--Clark Worldwide, Inc.
McCarthy Neil
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