Electrochemical Generation of Quaternary Ammonium Compounds

a technology of quaternary ammonium and halide salts, which is applied in the production of electrolytic organic products, manufacturing tools, electrolysis components, etc., can solve the problems of reducing the overall combination effect, adversely affecting the stability of compounds and solutions, and the decomposition of combined solutions typically degrades quickly, so as to achieve the effect of increasing the disinfection

Inactive Publication Date: 2012-09-13
MIOX CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]An embodiment of the present invention is a method for producing a solution, the method comprising electrolyzing a first solution comprising a quaternary ammonium compound in solution and producing a second solution comprising a quaternary ammonium hypohalite in solution. The quaternary ammonium compound preferably comprises a quaternary ammonium halide. The first solution optionally further comprises a halide salt, preferably an alkali metal halide salt, in solution. The first solution optionally comprises a compound selected from the group consisting of surfactant, organic surfactant, colorant, perfume, disinfectant, germicide, and biocide. The second solution preferably further comprises an additional oxidant species, optionally selected from the group consisting of halide based oxidant, halogen, hydrogen peroxide, ozone, chlorine dioxide, and combinations thereof. The combination of the quaternary ammonium hypohalite and the additional oxidant species in the second solution preferably substantially increases the disinfection efficacy of the second solution over an unelectrolyzed solution comprising the quaternary ammonium hypohalite and the additional oxidant species mixed together in solution. The second solution preferably does not substantially comprise a halide salt.

Problems solved by technology

However, the combined solution typically degrades quickly.
It is believed the organic portion of the compound will react with the hypohalite portion, decreasing the efficacy of the overall combination for disinfection and sanitization, thereby adversely affecting stability of the compounds and solutions.
However, electrochemistry may also destroy (through oxidation or reduction processes at electrode surfaces) organic compounds dissolved in water, such as aqueous solutions of quaternary ammonium compounds.

Method used

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  • Electrochemical Generation of Quaternary Ammonium Compounds
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Examples

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example 1

[0048]An aqueous solution of benzalkonium chloride was prepared by dissolving 10 grams of benzalkonium chloride in 1000 mL of deionized water to give a 1% (10,000 mg / L) solution. 200 mL of this solution was transferred to a 250 mL beaker, and a three electrode cell was immersed in the solution. The cell was then energized to 12 volts for 20 minutes. During this time, extensive bubbling was observed on the cathodic electrodes, producing a foam above the surface of the solution (similar to that shown in FIGS. 10a and 10b). After 20 minutes, a sample of the electrolyzed solution was withdrawn and the free available chlorine (FAC) content of the solution was determined to be 332 mg / L using the diethyl-p-phenylene diamine (DPD) method.

example 2

[0049]An aqueous solution of cetyltrimethylammonium chloride was prepared by adding 20 mL of a 25% by weight cetyltrimethylammonium solution to 1000 mL of deionized water to give a 0.5% (5,000 mg / L) solution. 200 mL of this solution was transferred to a 250 mL beaker, and a three electrode cell was immersed in the solution. The cell was then energized to 12 volts for 60 minutes. During this time, extensive bubbling was observed on the cathodic electrodes, producing a foam above the surface of the solution (similar to that shown in FIGS. 10a and 10b). After 60 minutes, a sample of the electrolyzed solution was withdrawn and the free available chlorine content of the solution was determined to be 360 mg / L using the DPD method.

example 3

[0050]A solution containing 100 mg / L benzalkonium chloride and 5,000 mg / L sodium chloride was prepared by dissolving 0.1 g benzalkonium chloride and 5 g sodium chloride in 1000 mL deionized water. 200 mL of this solution was transferred to a 250 mL beaker, and a three electrode cell was immersed in the solution. The cell was then energized to 12 volts for 20 minutes. During this time, extensive bubbling was observed on the cathodic electrodes, producing a foam above the surface of the solution (similar to that shown FIGS. 10a and 10b). After 20 minutes, a sample of the electrolyzed solution was withdrawn and the free available chlorine content of the solution was determined to be 3,000 mg / L using the DPD method.

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Abstract

Method and apparatus for electrochemical generation of quaternary ammonium hypohalite salts, which may be combined with the capabilities of free chlorine to form a novel biocidal system. An aqueous solution preferably comprising dissolved quaternary ammonium halide salts is electrolyzed, which converts the halide component of the quaternary ammonium salt to the corresponding halogen. The halogen dissolves in the aqueous solution producing hypohalous acid and hypohalite anion. A combination of one or more quaternary ammonium compounds and a halide salt, surfactant, and/or germicide may be electrolyzed. The solution may be incorporated into a delivery system for example, a spray bottle or hand sanitizer, or as part of a dispensing system whereby quaternary ammonium halide salts absorbed onto wipes can be dispensed as quaternary ammonium hypohalite salts.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to and the benefit of filing of U.S. Provisional Patent Application Ser. No. 61 / 450,735, entitled “Electrochemical Generators for the Production of Quaternaryammonium Hypohalites from Quaternaryammonium Halide Salts”, filed on Mar. 9, 2011, the specification of which incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention (Technical Field)[0003]The present invention is related to electrochemical conversion of quaternary ammonium halide salts to quaternary ammonium hypohalite salts preferably through the anodic oxidation of the halide anions of the quaternary ammonium halide salts.[0004]2. Background Art[0005]Note that the following discussion may refer to a number of publications and references. Discussion of such publications herein is given for more complete background of the scientific principles and is not to be construed as an admission that such publications are pr...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C25B1/24C25B11/02C25B9/00
CPCC25B11/02C25B1/24C25B3/06C25B1/26C25B1/30C25B9/00C25B3/27
Inventor BOAL, ANDREW K.RIVERA, SUSANSANCHEZ, JUSTIN
Owner MIOX CORP
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