Improvements relating to hypochlorous acid solutions
AssigneeXanadox Technologies Limited
InventorRichard Maxwell Barrett
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Abstract
A process for preparing an aqueous solution comprising hypochlorous acid, the process comprising: (i) treating an aqueous starting solution comprising hypochlorite and a precipitable counter-ion with a precipitation agent to form a counter-ion precipitate and a supernatant liquid having a pH greater than 6; (ii) removing at least part of said precipitate; and subsequently (iii) acidifying at least part of the supernatant liquid with a strong inorganic acid other than hydrochloric acid, to a pH in the range of from 3.0 to 6.0, to form an aqueous product solution comprising hypochlorous acid. Solutions obtainable by the process are also described, as are related uses.
Claims12
A process for preparing an aqueous solution comprising hypochlorous acid, the process comprising:
- i. treating an aqueous starting solution comprising hypochlorite and a precipitable counter-ion with an alkali metal carbonate to form a counter-ion precipitate and a supernatant liquid having a pH greater than 6.0;
- ii. removing at least part of said precipitate;
- and subsequently
- iii. acidifying at least part of the supernatant liquid with a strong inorganic acid other than hydrochloric acid, to a pH in the range of from 3.0 to 6.0, to form an aqueous product solution comprising hypochlorous acid.
A process for preparing an aqueous solution comprising hypochlorous acid, the process comprising:
- i. treating an aqueous starting solution comprising calcium or magnesium hypochlorite with an alkali metal carbonate to form a precipitate and a supernatant liquid;
- ii. removing at least part of said precipitate;
- and subsequently
- iii. acidifying at least part of the supernatant liquid with a strong inorganic acid other than hydrochloric acid, to a pH in the range of from 3.0 to 6.0, to form an aqueous product solution comprising hypochlorous acid.
Dependencies are inferred from the claim text.