Liquid purification or separation – Processes – Chemical treatment
Reexamination Certificate
2007-08-07
2007-08-07
Hopkins, Robert (Department: 1724)
Liquid purification or separation
Processes
Chemical treatment
C210S764000, C210S167110, C423S477000
Reexamination Certificate
active
10480009
ABSTRACT:
The invention relates to a method for producing an essentially chlorite-free, stable, aqueous chlorine-oxygen solution. Said method comprises the following steps: (1) a hydrogen sulfate compound is dissolved in water, (2) an acid is added to the aqueous solution containing hydrogen sulfate in such a quantity that the pH value in the target final product in the form of the essentially chlorite-free, stable, aqueous chlorine-oxygen solution is maintained between approximately 3 and 5; (3) a peroxide compound is added; and (4) an aqueous chlorite solution is added dropwise in a quantity of between approximately 60 and 90 mole %, especially between 70 and 80 mole %, of chlorite, in relation to the concentration of peroxide compound. The invention also relates to the chlorine-oxygen solutions which can be obtained by means of said method.
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Fay Sharpe LLP
Hopkins Robert
P&W Invest Vermogensverwaltungsgesellschaft mbH
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