Method for controlling sterile water production device

Details Method for controlling sterile water production device Method for controlling sterile water production device

2006-04-27

2009-06-30

Savage, Matthew O (Department: 1797)

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

C210S752000, C210S756000

Reexamination Certificate

active

07553424

ABSTRACT:
In controlling a sterile water production device, if pH of sterile water is smaller than a preset pH, an additional aqueous hypochlorite solution is injected into the sterile water to increase the pH back to the preset pH, and a molar quantity of residual alkaline impurities present in such additional aqueous hypochlorite solution is determined. Next, a predetermined amount of further additional aqueous hypochlorite solution is injected into the sterile water, wherein such predetermined amount is an amount required to yield additional content of hypochlorous acid in a resulting sterile water, to such a degree that a molar quantity of that hypochlorous acid is equal to the foregoing determined molar quantity of residual alkaline impurities. After such injection, pH of sterile water yielded is increased, and an acid aqueous solution is then injected into the sterile water to thereby decrease the increased pH back to the preset pH.

REFERENCES:
patent: 2005/0218054 (2005-10-01), Sakata et al.

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