Electrolysis: processes – compositions used therein – and methods – Electrolytic material treatment – Organic
Patent
1997-01-28
1999-01-12
Phasge, Arun S.
Electrolysis: processes, compositions used therein, and methods
Electrolytic material treatment
Organic
205742, 205556, 205500, 204228, 204275, C02F 1461
Patent
active
058582010
DESCRIPTION:
BRIEF SUMMARY
This application is a 371 of PCT/JP95/01503 filed Jul. 28, 1995.
TECHNICAL FIELD
The present invention relates to strong acid sterilizing liquid containing hypochlorous acid at a low concentration which is suitable for use on the human body, a method and an apparatus for generating strong acid sterilizing liquid containing hypochlorous acid at a low concentration, and an apparatus for generating and dispensing strong acid sterilizing liquid containing hypochlorous acid at a low concentration.
BACKGROUND ART
The bactericidal activity of an aqueous solution of hypochlorous acid varies with the pH of the solution because the state of chlorine compounds dissolved in the aqueous solution varies with pH.
When the pH of an aqueous solution of hypochlorous acid is 8 or more, or the aqueous solution of hypochlorous acid is alkaline, hypochlorous acid ions (ClO.sup.-) having fairly low bactericidal activity are mainly present in the aqueous solution. Thus, the bactericidal activity of an alkaline aqueous solution of hypochlorous acid is fairly low.
When the pH of aqueous solution of hypochlorous acid is 7 or less, or the aqueous solution of hypochlorous acid is acidic, the amount of hypochlorous acid (HClO) which has bactericidal activity 10 to 100 times larger than that of hypochlorous acid ions, is larger than the amount of hypochlorous acid ions. Thus, the bactericidal activity of an acidic aqueous solution of hypochlorous acid is high.
When the pH of an aqueous solution of hypochlorous acid is 5.5 or less, substantially 100% of the chlorine compound dissolved in the aqueous solution is hypochlorous acid. Thus, the bactericidal activity of the aqueous solution of hypochlorous acid becomes even higher.
When the pH of an aqueous solution of hypochlorous acid is 3 or less, a part of the chlorine compound dissolved in the aqueous solution becomes chlorine gas (Cl.sub.2) having higher bactericidal activity than that of hypochlorous acid. Thus, the bactericidal activity of the aqueous solution of hypochlorous acid becomes even higher.
Acid sterilizing liquid containing hypochlorous acid can instantly kill bacteria such as Escherichia coli, MRSA, Staphylococcus aureus, etc. Acid sterilizing liquid containing hypochlorous acid can cure inflamed parts of the human body suffering from atopy dermatitis, body parts suffering from necrosis owing to diabetes, and bedsores of a bedridden old person. It is thought that acid sterilizing liquid containing hypochlorous acid kills MRSA present on such diseased parts, in this way suppressing itch and suppuration of the parts and thereby curing them.
The skin is damaged by application of acid sterilizing liquid containing hypochlorous acid at a high concentration.
There is a need for an apparatus for generating and dispensing strong acid sterilizing liquid which contains hypochlorous acid at a concentration of about 2 ppm, the concentration prescribed by Japanese City Water Organization in its water purifier examination manual, whose pH is 3 or less, and which is suitable for use on the human body.
A continuously generating type apparatus having a barrier type electrolytic cell has been developed for generating acid liquid containing hypochlorous acid. In this apparatus, salt water is passed through a channel formed between a positive electrode plate and a negative electrode plate disposed to face opposite surfaces of a barrier membrane, and DC voltage is applied between the electrodes to electrolyze the salt water.
At the positive electrode, hydroxide ions (OH.sup.-) contained in the salt water give electrons to the positive electrode to become oxygen gas and are eliminated from the water. Thus, the concentration of hydrogen ions (H.sup.+) in the water flowing through the space between the barrier membrane and the positive electrode increases to make the water acidic. Also at the positive electrode, chlorine ions (Cl.sup.-) contained in the salt water give electrons to the positive electrode to become chlorine gas (Cl.sub.2). The chlorine gas dissolves in the acidic water to be
REFERENCES:
patent: 3819329 (1974-06-01), Kaestner et al.
patent: 4761208 (1988-08-01), Gram et al.
patent: 4783246 (1988-11-01), Langeland et al.
patent: 5308507 (1994-05-01), Robson
Ando Sigeru
Eki Toshio
Miyahara Hidetaka
Otsuka Toshiharu
Takeshita Akemi
Phasge Arun S,.
Toto Ltd.
LandOfFree
Strong acid sterilizing liquid containing hypochlorous acid at a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Strong acid sterilizing liquid containing hypochlorous acid at a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong acid sterilizing liquid containing hypochlorous acid at a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1510815