Patent ID: 9340883
Filing Date: 2016-05-17
CPC Classification: C02F,C25B

Claim Text:
1. A method for obtaining a disinfectant from an aqueous solution of sodium chloride by using a diaphragm electrolyser having a tubular cathode as an internal electrode, an anode as an external electrode, and a cover-mixer having a branch in communication with an anode chamber of the electrolyzer, the method comprising: providing a first fresh water flow and directing the first fresh water flow to an internal space of the cathode; separating a second fresh water flow from the first fresh water flow and channeling the second fresh water flow into a cathode chamber of the electrolyser, wherein the flow rate of the second fresh water flow through the cathode chamber is 0.4-0.8% of the flow rate of the first fresh water flow through the internal space of the cathode; separating a third fresh water flow from the first fresh water flow and channeling said third fresh water flow to a sodium chloride mixer to form a solution having sodium chloride concentration of 0.02-1.2% wt/vol; channeling said solution to the anode chamber of the electrolyzer as an anolyte flow, wherein the flow rate of the anolyte flow through the anode chamber is 16-20% of the flow rate of the first fresh water flow through the internal space of the cathode; channeling both the anolyte flow from the anode chamber and the first fresh water flow from the internal space of the cathode to the branch of the cover-mixer in communication with the anode chamber; reducing a concentration of active chlorine in the anolyte flow by mixing said anolyte flow with the first fresh water supply in the branch of the cover-mixer in communication with the anode chamber to form a disinfectant having with a pH level of 5.5-7.5; discharging said second fresh water flow from the cathode chamber for utilization; discharging the disinfectant from the electrolyzer; and channeling hydrogen from the cathode chamber at an exhaust outlet.