Storage-stable solution comprising hypochlorous acid and/or hypochlorite

A method of producing a storage-stable aqueous solution comprising hypochlorous acid and/or hypochlorite, comprising the steps of:

• a. introducing an aqueous NaCl solution into an electrolytic cell (1) which comprises a cathode compartment (2) and an anode compartment (3), which are separated from each other by a separator (4), wherein the aqueous NaCl solution is introduced into the cathode compartment (2) via a first feed line (5) and into the anode compartment (3) via a second feed line (6), and wherein the aqueous NaCl solution comprises more than 100 ppm NaCl,
• b. applying a direct current to a cathode in the cathode compartment (2) and to an anode in the anode compartment (3) to produce a cathode solution in the cathode compartment (2) and an anode solution in the anode compartment (3), and
• c. mixing a portion of the cathode solution with the aqueous NaCl solution before introducing it into the anode compartment (3) and/or with the anode solution in the anode compartment (3) and/or with the anode solution in a discharge line (7) associated with the anode compartment (3), or adding an NaOH solution into the anode compartment (3) and/or into a discharge line (7) associated with the anode compartment (3),
• in order to produce a storage-stable aqueous solution comprising hypochlorous acid and/or hypochlorite that has a pH value of 5 to 6 and can be discharged via the discharge line (7), wherein the introduction of the aqueous NaCl solution into the electrolytic cell (1) and the discharge of the storage-stable aqueous solution from the electrolytic cell (1) occur at a flow rate of 0.1 m/s to 2 m/s.

A method of producing a storage-stable aqueous solution comprising hypochlorous acid and/or hypochlorite, comprising the steps of:

• a. introducing an aqueous NaCl solution into an electrolytic cell (1) which comprises a cathode compartment (2) and an anode compartment (3), which are separated from each other by a separator (4), wherein the aqueous NaCl solution is introduced into the cathode compartment (2) via a first feed line (5) and into the anode compartment (3) via a second feed line (6), and wherein the aqueous NaCl solution comprises more than 100 ppm NaCl and has an electrical conductivity of less than 5 mS/cm,
• b. applying a direct current to a cathode in the cathode compartment (2) and to an anode in the anode compartment (3) to produce a cathode solution in the cathode compartment (2) and an anode solution in the anode compartment (3), and
• c. mixing a portion of the cathode solution with the aqueous NaCl solution before introducing it into the anode compartment (3) and/or with the anode solution in the anode compartment (3) and/or with the anode solution in a discharge line (7) associated with the anode compartment (3),
• in order to produce a storage-stable aqueous solution comprising hypochlorous acid and/or hypochlorite that has a pH value of 5 to 6 and can be discharged via the discharge line (7).