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US 2017/0321330 A1Published application
Methods and systems for making hypochlorite solution from reverse osmosis brine
AssigneeMalvi Technologies, LLC
InventorVinod Malhotra
Life of this patent
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Abstract
Embodiments disclosed herein relate to methods and systems for producing and using hypochlorite from brine.
Claims29
A method for producing hypochlorite, the method comprising:
- providing a divided electrochemical cell,
- with the divided electrochemical cell, electrochemically moving chloride ions from a brine solution in a cathode compartment to an anolyte in an anode compartment of the divided electrochemical cell via an ion-selective membrane therebetween;
- oxidizing the chloride ions at an anode in the anode compartment to form a mixture of chlorine-containing gases including chlorine, hypochlorous acid, and hydrochloric acid;
- recirculating the anolyte including a substantially pure salt solution through the anode compartment, while a current is applied therein to produce the chlorine-containing gases;
- purging the chlorine-containing gases of anolyte of the anode compartment with one or more of air or nitrogen to displace the chlorine-containing gases;
- and
- combining the chlorine-containing gases displaced via purging with water to form hypochlorite.
4 more elements
A method for producing hypochlorite, the method comprising:
- providing a divided electrochemical cell;
- with the divided electrochemical cell, electrochemically moving chloride ions from a first brine solution in a cathode compartment to a second brine solution in an anode compartment of the divided electrochemical cell via an ion-selective membrane therebetween;
- oxidizing the chloride ions to form chlorine gas at an anode in the anode compartment;
- circulating an anolyte comprising the second brine solution through the anode compartment while a current is applied therein to produce chlorine-containing gases including one or more of chlorine, hypochlorous acid, or hydrochloric acid therein;
- and
- combining one or more displaced chlorine-containing gases with water to form hypochlorite.
3 more elements
A system for producing hypochlorite, the system comprising;
- a divided electrochemical cell, the divided electrochemical cell including:
- an anode compartment having an anode,
- a cathode compartment having a cathode, and
- a selective membrane separating the anode compartment from the cathode compartment;
- a brine source in fluid communication with the cathode compartment;
- an anolyte feed tank in fluid communication with the anode compartment;
- an gas inlet in fluid communication with the anolyte feed tank, the gas inlet configured to provide a purge gas to an anolyte in the anolyte feed tank to drive off one or more chlorine-containing gases therein;
- an eductor fluidly coupled to the anolyte feed tank and configured to mix the chlorine-containing gases with a water supply;
- and
- a water line operably coupled to the eductor, the water line configured to feed water through the eductor effective to combine the chlorine-containing gases into the water supply passing through the water line to form hypochlorite.
7 more elements
Dependencies are inferred from the claim text.