Chemistry of inorganic compounds – Halogen or compound thereof – Chlorine dioxide
Patent
1988-08-03
1991-04-23
Straub, Gary P.
Chemistry of inorganic compounds
Halogen or compound thereof
Chlorine dioxide
422111, C01B 1102, G05D 700
Patent
active
050098756
ABSTRACT:
Provided is a process for the preparation of chlorine dioxide. The process comprises separately feeding compounds, which when reacted together yield chlorine dioxide, into a diluting water stream. The compounds react to thereby form chlorine dioxide. Shutoff valves are provided in the feed lines of the compounds, which shutoff valves are in cooperation with a supply monitoring system and a pH meter. The supply monitoring system monitors the feed lines of the compounds and the water stream. When the monitoring detects a loss in the supply of the water or one of the compounds, shutoff valves are closed to restrict any further flow of the compounds through the feed lines. The pH meter is located downstream of the reaction and monitors the pH of the chlorine dioxide solution formed by the reaction. When the pH is detected to be outside of a particular range, the shutoff valve are closed to restrict any further flow of the compounds through the feed lines. This system for generating chlorine dioxide has the advantage of allowing one to prepare chlorine dioxide of optimal quality on a consistent basis. Moreover, the system provides for immediate safeguards in the event of an emergency. Such safeguards are extremely important when dealing with hazardous chemicals, such as those used in the generation of chlorine dioxide.
REFERENCES:
patent: 3286992 (1966-11-01), Armemades et al.
patent: 4247531 (1981-01-01), Hicks
patent: 4250159 (1981-02-01), Cowley
Perry's Chemical Engineer's Handbook, 6th Ed., Green et al., McGraw-Hill Book Co., 1984, pp. 6-105 to 6-107.
Kelley Joseph M.
Kucher Donald C.
Mayurnik George
International Dioxcide, Inc.
Kalinchak Stephen G.
Straub Gary P.
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