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NZ748885B2 - Alkaline and chlorine solutions produced using electro-chemical activation - Google Patents
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NZ748885B2 - Alkaline and chlorine solutions produced using electro-chemical activation - Google Patents

Alkaline and chlorine solutions produced using electro-chemical activation Download PDF

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Publication number
NZ748885B2
NZ748885B2 NZ748885A NZ74888517A NZ748885B2 NZ 748885 B2 NZ748885 B2 NZ 748885B2 NZ 748885 A NZ748885 A NZ 748885A NZ 74888517 A NZ74888517 A NZ 74888517A NZ 748885 B2 NZ748885 B2 NZ 748885B2
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NZ
New Zealand
Prior art keywords
chamber
neutralization
cathode
eca system
anode
Prior art date
Application number
NZ748885A
Other versions
NZ748885A (en
Inventor
Jan E Veening
Original Assignee
Diversey Inc
Filing date
Publication date
Application filed by Diversey Inc filed Critical Diversey Inc
Priority claimed from PCT/US2017/031264 external-priority patent/WO2017200772A1/en
Publication of NZ748885A publication Critical patent/NZ748885A/en
Publication of NZ748885B2 publication Critical patent/NZ748885B2/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4236—Arrangements to sterilize or disinfect dishes or washing liquids
    • A47L15/4238—Arrangements to sterilize or disinfect dishes or washing liquids by using electrolytic cells
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/06—Electrolysed water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C02F1/4618—Devices therefor; Their operating or servicing for producing "ionised" acidic or basic water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • C02F1/4674—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation with halogen or compound of halogens, e.g. chlorine, bromine
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/46115—Electrolytic cell with membranes or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46125—Electrical variables
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/46145—Fluid flow
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4612—Controlling or monitoring
    • C02F2201/4615—Time
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/46—Apparatus for electrochemical processes
    • C02F2201/461—Electrolysis apparatus
    • C02F2201/46105—Details relating to the electrolytic devices
    • C02F2201/4618—Supplying or removing reactants or electrolyte
    • C02F2201/46185—Recycling the cathodic or anodic feed
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/12—Location of water treatment or water treatment device as part of household appliances such as dishwashers, laundry washing machines or vacuum cleaners
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/087—Recycling of electrolyte to electrochemical cell
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/21—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms two or more diaphragms
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/23—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms comprising ion-exchange membranes in or on which electrode material is embedded
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/003—Washing machines, apparatus, or methods not otherwise provided for using electrochemical cells
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/004—Washing machines, apparatus, or methods not otherwise provided for using chlorine generators
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/007—Arrangements of water softeners
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
    • D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
    • D06L4/24—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using chlorites or chlorine dioxide

Abstract

electro-chemical activation (ECA) system includes an anode chamber, a cathode chamber, and a neutralization chamber. The anode chamber includes an anode configured to convert water having an alkaline-metal chloride into an anodic electrolyte that includes hypochlorous acid. The cathode chamber includes a cathode configured to convert water into a cathodic electrolyte. The neutralization chamber includes a neutralization cathode configured to remove protons from the anodic electrolyte after it leaves the anode chamber. The ECA system is configured to recirculate the anodic electrolyte back through the anode chamber and the neutralization chamber at least one more time to produce a concentrated chlorine solution. The ECA system is further configured to recirculate the cathodic electrolyte back through the cathode chamber at least one additional time to produce a concentrated alkaline solution.

Claims (20)

1. An electro-chemical activation (ECA) system, comprising: a chamber cell comprising an anode chamber comprising an anode, wherein the anode is configured to convert water having an alkaline-metal chloride into an anodic electrolyte comprising protons and hypochlorous acid; a cathode chamber comprising a cathode, wherein the cathode is configured to convert water into a cathodic electrolyte; and a first membrane separating the anode chamber from the cathode chamber; and a neutralization cell separate from the chamber cell, the neutralization cell comprising a neutralization chamber in fluid communication with the anode chamber, the neutralization chamber comprising a neutralization cathode and a neutralization anode, wherein the neutralization chamber is configured to neutralize the protons of the anodic electrolyte and increase a pH level of the anodic electrolyte from the anode chamber while increasing a concentration of the hypochlorous acid; a neutralization recirculation path configured to recirculate at least a portion of the anodic electrolyte back through the neutralization chamber; and a chlorine solution tank configured to receive the anodic electrolyte from the neutralization chamber and to provide the anodic electrolyte back to the neutralization chamber.
2. The ECA system according to claim 1, wherein the ECA system is configured to recirculate the anodic electrolyte back through the anode chamber and the neutralization chamber multiple times to produce a concentrated chlorine solution; and wherein the ECA system is further configured to recirculate the cathodic electrolyte back through the cathode chamber multiple times to produce a concentrated alkaline solution.
3. The ECA system according to claim 2, wherein the first membrane is configured to hinder the migration of Cl¯ between the anode chamber and the cathode chamber.
4. The ECA system according to claim 2 or claim 3, wherein the cathode is located in the cathode chamber in direct contact with the first membrane.
5. The ECA system according to any one of claims 2 to 4, wherein a ratio of exposed surface area of the neutralization anode in the neutralization chamber to exposed surface area of the neutralization cathode in the neutralization chamber is in a range from about 1:1 to about 1:10,000.
6. The ECA system according to any one of claims 2 to 5, further comprising a brine chamber located in the chamber cell between the anode chamber and the cathode chamber, wherein the brine chamber and the cathode chamber are separated by the first membrane, and wherein the brine chamber and the anode chamber are separated by a second membrane.
7. The ECA system according to claim 6, wherein the second membrane is configured to permit migration of Cl¯ from the brine chamber to the anode chamber.
8. The ECA system according to claim 7, wherein the second membrane is further configured to hinder the migration of sodium between the brine chamber and the anode chamber.
9. The ECA system according to any one of claims 6 to 8, wherein the ECA system is configured to cycle brine through the brine chamber.
10. The ECA system according to any one of claims 2 to 9, further comprising: an electronic controller configured to receive an indication of a pH level of the anodic electrolyte and further configured to control one or more of power to or activation time of the cathode and the neutralization cathode based on the indication of the pH level of the anodic electrolyte.
11. The ECA system according to claim 10, wherein the electronic controller is further configured to control one or more of recirculation of the anodic electrolyte by the ECA system, recirculation of the cathodic electrolyte by the ECA system, dispensing of the concentrated chlorine solution from the ECA system, or dispensing of the concentrated alkaline solution from the ECA system.
12. The ECA system according to any one of claims 2 to 9, further comprising: an electronic controller configured to receive an indication of the pH level of the anodic electrolyte and to control power to the cathode and the neutralization cathode based on the indication of the pH level of the anodic electrolyte so as to perform operations comprising operating the ECA system in a production mode to generate the anodic electrolyte comprising the protons and the hypochlorous acid; operating the ECA system in a neutralization mode to increase the pH level of the anodic electrolyte while increasing the concentration of the hypochlorous acid; alternating operation between the production mode and the neutralization mode.
13. The ECA system according to claim 12, wherein in the production mode, power to the cathode is on and power to the neutralization cathode is on, and in the neutralization mode, the power to the cathode is off and power to the neutralization cathode is on.
14. A method of using the ECA system according to any one of claims 2 to 13, the method comprising: adding brine to the ECA system; adding water to the ECA system; circulating the brine through the anode chamber and the neutralization chamber multiple times to produce the concentrated chlorine solution, wherein the concentrated chlorine solution has a pH level in a range from about pH 4 to about pH 8; and circulating the water through the cathode chamber multiple times to produce the concentrated alkaline solution.
15. The method according to claim 14, wherein the concentrated chlorine solution has a pH level in a range from about pH 4 to about pH 6.
16. The method according to any one of claims 12 to 15, wherein the concentrated chlorine solution has a concentration in a range from about 0.02% to about 14%.
17. The method according to any one of claims 14 to 16, further comprising dispensing the concentrated chlorine solution to a washing machine, and wherein the washing machine is configured to dilute the concentrated chlorine solution from the range from about 0.02% to about 14% to a range from about 15 ppm to about 60 ppm.
18. The method according to any one of claims 14 to 17, wherein the concentrated alkaline solution has an alkalinity in a range from about 0.02% Na O to about 50% Na2O.
19. A method of operating the ECA system according to any one of claims 2 to 13, the method comprising: operating the ECA system in a production mode to generate the anodic electrolyte comprising the protons and the hypochlorous acid; operating the ECA system in a neutralization mode to increase the pH level of the anodic electrolyte while increasing the concentration of the hypochlorous acid; and alternating operation between the production mode and the neutralization mode to remain at or above about pH 4 while increasing the concentration of the hypochlorous acid.
20. The method according to claim 19, wherein the alternating operation between the production mode and the neutralization mode keeps the pH level of the anodic electrolyte within a range of between about 4 and about 7.0. 126 136 122 132 r ' I f 1E t I r " ? - - r-- -- 108 106yl 124 134
NZ748885A 2017-05-05 Alkaline and chlorine solutions produced using electro-chemical activation NZ748885B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201662337362P 2016-05-17 2016-05-17
US201662421419P 2016-11-14 2016-11-14
PCT/US2017/031264 WO2017200772A1 (en) 2016-05-17 2017-05-05 Alkaline and chlorine solutions produced using electro-chemical activation

Publications (2)

Publication Number Publication Date
NZ748885A NZ748885A (en) 2024-12-20
NZ748885B2 true NZ748885B2 (en) 2025-03-21

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