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US 11,235,975 B2Granted
Stabilized sodium chlorite solution and a method of remediating an aqueous system using the solution
AssigneeTrudx, Inc.
InventorRoy W. Martin
Life of this patent
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Abstract
A stable aqueous composition of sodium chlorite and a hydrated borate donor having a pH of greater than 9.0 and the weight percent ratio of sodium chlorite (reported as NaClO2) to hydrated borate donor (reported as the sum of H2O+B2O3) is less than 1.5:1 respectfully. A method of remediating an aqueous system using the stable aqueous composition.
Claims36
A method for the remediation of an aqueous system, the method comprising:
- converting a composition into an aqueous solution of chlorine dioxide using a chlorine dioxide generator, wherein the composition is formed from water, sodium chlorite and a hydrated borate donor, the composition having a pH of greater than 9.0, and the weight percent ratio of sodium chlorite (NaClO2) to hydrated borate donor (H2O+B2O3) is less than 1.5:1 respectfully;
- applying the aqueous solution of chlorine dioxide to the aqueous system;
- and
- sustaining a chlorine dioxide concentration to obtain a Ct value sufficient to achieve remediation, wherein the Ct value is calculated by multiplying the average concentration of chlorine dioxide by the time.
1 more element
A method for the remediation of an aqueous system, the method comprising:
- applying a composition to the aqueous system, wherein the composition is formed from water, sodium chlorite, and a hydrated borate donor, the composition having a pH of greater than 9.0, and the weight percent ratio of sodium chlorite (NaClO2) to hydrated borate donor (H2O+B2O3) is less than 1.5:1 respectfully;
- converting the chlorite into chlorine dioxide using a cyclic process and/or UV activation of chlorite;
- and
- sustaining a chlorine dioxide concentration to obtain a Ct value sufficient to achieve remediation, wherein the Ct value is calculated by multiplying the average concentration of chlorine dioxide by the time.
1 more element
A stabilized aqueous sodium chlorite composition formed from:
- water;
- sodium chlorite;
- and
- a hydrated borate donor, wherein the composition having a pH of greater than 9.0, and the weight percent ratio of sodium chlorite (NaClO2) to hydrated borate donor (H2O+B2O3) is less than 1.5:1 respectfully.
1 more element
Dependencies are inferred from the claim text.