Liquid purification or separation – Processes – Chemical treatment
Patent
1992-10-30
1993-11-23
Silverman, Stanley S.
Liquid purification or separation
Processes
Chemical treatment
210755, 210760, 210764, 422 29, 422 37, C02F 176, C02F 178
Patent
active
052641368
ABSTRACT:
Methods and compositions for generating stable, residual disinfectants during the ozonization of water, comprising the carrying out the ozonization of water in the presence of bromide ions and an effective amount of a hypobromite ion scavenger possessing imide and/or amide functionality that preferentially converts hypobromite ions to biocidal, ozone-stable derivatives thereof to thereby suppress the catalytic decomposition reaction of ozone with hypobromite ions. The methods and compositions of the present invention are useful for water disinfection and algae control, generally.
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patent: 4453953 (1984-06-01), Tanaka
patent: 5130033 (1992-07-01), Thornhill
D. Pacik and R. G. Rice, "The Hydrozone-Kompakt Process--A New Method for Treatment and Disinfection of Swimming Pool and Bathing Water," Ozone Sci. & Eng., 31(1), 63-90, 1991.
W. R. Haag, J. Hoigne and H. Bader, "Improved Ammonia Oxidation by Ozone in the Presence of Bromide Ion During Water Treatment," Water Res., 18(9), 1125-1128, 1984.
W. R. Haag and Jurg Hoigne, "Ozonation of Bromide-Containing Waters: Kinetics of Formation of Hypobromous Acid and Bromate," Environ. Sci. Technol., 17(5), 261-267, 1983.
Chemical Abstract of Japanese Patent No. 03,232,584, dated Oct. 16, 1991.
Dadgar Ahmad
Howarth Jonathan N.
McKeown Julie A.
Sergent Rodney H.
Great Lakes Chemical Corporation
Nessler Cynthia L.
Silverman Stanley S.
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