Liquid purification or separation – Processes – Chemical treatment
Patent
1985-05-28
1987-05-19
Hruskoci, Peter
Liquid purification or separation
Processes
Chemical treatment
210750, 210754, 210756, 210903, 210916, C02F 120
Patent
active
046666109
ABSTRACT:
A process for neutralizing chloramines, chlorine and ammonia in marine and fresh waters by adding an alkali metal formaldehydebisulfite in a dry or solution form in which the alkali metal formaldehydebisulfite is selected from the group consisting of sodium formaldehydebisulfite and potassium formaldehydebisulfite. Preferably, the alkali metal formaldehydebisulfite is sodium formaldehydebisulfite added in the amount at least equal to the greater of the quantity required to react on a one to one molecular basis with 4 times the stoichiometric amount of ammonia, 12 times the stoichiometric amount of monochloramine, 10 times the stoichiometric amount of dichloramine or 12 times the stoichiometric amount of chlorine in the form of hypochlorites present in the water to be treated.
REFERENCES:
patent: 3446733 (1969-05-01), Shell
patent: 3505217 (1970-04-01), Morico
patent: 3843545 (1974-10-01), Heuston
patent: 4364835 (1982-12-01), Cheh
patent: 4385996 (1983-05-01), McCarthy
Blasiola, George C., "Chloramines", Pet Age, Jul., 1984, pp. 25-26.
Herwig, Nelson, "Toxic Chloramine Induced Intravascular Hemolytic Anemia in Fish", Freshwater and Marine Aquarium, 5(10), pp. 11-13, 91-92, 1982.
Wheaton, Fredrick Warner, Aquacultural Engineering, pp. 608-612, 1977.
Allied Chemical Corporation, "Dechlorination", 1977.
Helz, George R. and Lynn Kosak-Channing, "Dechlorination of Wastewater and Cooling Water", Environ. Sci. & Tech., 18(2), pp. 48A-55A, 1984.
Morrison, Robert T. and Robert N. Boyd, Organic Chemistry, 2nd edition, pp. 639-641, 1966.
Walker, J. Frederic, Formaldehyde, 3rd edition, pp, 219, 251-253, 486-488, 621-623, 638, 1975.
Aquascience Research Group, Inc.
Hruskoci Peter
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