CN111565570A - Insect repellent and method and apparatus for producing hypochlorous acid aqueous solution - Google Patents
Insect repellent and method and apparatus for producing hypochlorous acid aqueous solution Download PDFInfo
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- CN111565570A CN111565570A CN201980007588.4A CN201980007588A CN111565570A CN 111565570 A CN111565570 A CN 111565570A CN 201980007588 A CN201980007588 A CN 201980007588A CN 111565570 A CN111565570 A CN 111565570A
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- Prior art keywords
- hypochlorous acid
- aqueous solution
- water
- acid aqueous
- hypochlorite
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- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 239000007864 aqueous solution Substances 0.000 title claims abstract description 112
- 239000000077 insect repellent Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims abstract description 52
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 43
- 150000001450 anions Chemical class 0.000 claims abstract description 27
- 150000001768 cations Chemical class 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims description 41
- 238000002156 mixing Methods 0.000 claims description 29
- 238000003756 stirring Methods 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 19
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- 229940085991 phosphate ion Drugs 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 15
- 241000607479 Yersinia pestis Species 0.000 abstract description 12
- 230000001846 repelling effect Effects 0.000 abstract description 9
- -1 chlorine ions Chemical class 0.000 abstract description 7
- 230000000749 insecticidal effect Effects 0.000 abstract description 7
- 230000002940 repellent Effects 0.000 abstract description 5
- 239000005871 repellent Substances 0.000 abstract description 5
- 239000000460 chlorine Substances 0.000 abstract description 3
- 229910052801 chlorine Inorganic materials 0.000 abstract description 3
- 239000008213 purified water Substances 0.000 abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 139
- 235000011167 hydrochloric acid Nutrition 0.000 description 64
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 52
- 239000005708 Sodium hypochlorite Substances 0.000 description 51
- 229910021645 metal ion Inorganic materials 0.000 description 23
- 238000000746 purification Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000005416 organic matter Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 9
- 230000003247 decreasing effect Effects 0.000 description 8
- 241000700605 Viruses Species 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 5
- 241000233866 Fungi Species 0.000 description 5
- 241001506047 Tremella Species 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 4
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000003729 cation exchange resin Substances 0.000 description 4
- 230000007794 irritation Effects 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001747 exhibiting effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 239000000645 desinfectant Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002779 inactivation Effects 0.000 description 2
- YZQBYALVHAANGI-UHFFFAOYSA-N magnesium;dihypochlorite Chemical compound [Mg+2].Cl[O-].Cl[O-] YZQBYALVHAANGI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 150000004788 tropolones Chemical class 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 235000000023 Auricularia auricula Nutrition 0.000 description 1
- 241001149430 Auricularia auricula-judae Species 0.000 description 1
- 241000272834 Cairina moschata Species 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000255925 Diptera Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- 229910019093 NaOCl Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
- A01M29/12—Scaring or repelling devices, e.g. bird-scaring apparatus using odoriferous substances, e.g. aromas, pheromones or chemical agents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/08—Alkali metal chlorides; Alkaline earth metal chlorides
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P17/00—Pest repellants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B11/00—Oxides or oxyacids of halogens; Salts thereof
- C01B11/04—Hypochlorous acid
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B3/00—Electrolytic production of organic compounds
- C25B3/20—Processes
- C25B3/25—Reduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Organic Chemistry (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Agronomy & Crop Science (AREA)
- Dentistry (AREA)
- Toxicology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Electrochemistry (AREA)
- Insects & Arthropods (AREA)
- Birds (AREA)
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- Metallurgy (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Provided are a pest repellent containing a substance having an effect of repelling pests but no insecticidal effect, and a method and an apparatus for producing hypochlorous acid. The insect repellent contains hypochlorous acid aqueous solution. In the method and apparatus for producing a hypochlorous acid aqueous solution, water is purified by removing cations without removing anions in the water (ST1), and the purified water is mixed with an inorganic acid and hypochlorite, or an aqueous solution containing chlorine ions is electrolyzed in the purified water to produce a hypochlorous acid aqueous solution (ST 2).
Description
Technical Field
The present invention relates to a pest repellent having an effect of repelling harmful organisms such as pests from a plant or other protected object, and a method and an apparatus for producing a hypochlorous acid aqueous solution which can be used as the pest repellent.
Background
Conventionally, insect repellents having an effect of repelling harmful organisms such as pests from objects to be protected such as plants have been used. Insect repellents are used, for example, in agriculture to exert an effect of repelling pests from planted plants by spraying the insect repellent onto the planted plants.
The insect repellent contains a substance exhibiting the repellent effect. For example, patent document 1 describes an insect repellent containing a tropolone derivative as a substance exhibiting a repellent effect. In addition, this document also describes that tropolone derivatives have an insecticidal effect in addition to an insect-repellent effect.
However, if a substance exhibiting an insect-repellent effect also exhibits an insect-repellent effect as in the insect-repellent agent described in patent document 1, the substance exhibits an insect-repellent effect and is harmful, and there is a risk that the substance adversely affects the human body and the protected object. Therefore, in order to ensure higher safety for the human body and the object to be protected, development of an insect repellent containing a substance having an insect repellent effect but not an insecticidal effect is required.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2004-307431
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above problems, and an object thereof is to provide an insect repellent containing a substance having an effect of repelling pests but no insecticidal effect, and a method and an apparatus for producing an aqueous hypochlorous acid solution which can be used as the insect repellent.
Means for solving the problems
In order to solve the above problems, the present invention is an insect repellent characterized by containing an aqueous hypochlorous acid solution. According to the present invention, since the insect repellent contains the hypochlorous acid aqueous solution, the insect repellent can be obtained which contains a substance having a pest repelling effect but no insecticidal effect.
Further, in the insect repellent, the hypochlorous acid concentration in the hypochlorous acid aqueous solution may be 5ppm to 400 ppm. Thus, when the hypochlorous acid concentration of the hypochlorous acid aqueous solution is 5ppm or more, the effect of removing hypochlorous acid can be sufficiently exhibited. Further, the hypochlorous acid concentration of the hypochlorous acid aqueous solution is 400ppm or less, whereby the irritation of hypochlorous acid to the human body can be suppressed.
Further, in the insect repellent, the pH of the hypochlorous acid aqueous solution may be 4.0 to 7.0. Since the pH of the hypochlorous acid aqueous solution is 4.0 to 7.0, the hypochlorous acid aqueous solution can be kept weakly acidic, and the irritation of the hypochlorous acid aqueous solution to the human body can be reduced. Further, since the pH of the hypochlorous acid aqueous solution is 4.0 to 7.0, the sterilization function of hypochlorous acid for abstracting electrons from germs and the virus inactivation function of hypochlorous acid for abstracting electrons from viruses can be improved.
Further, in the insect repellent, the hypochlorous acid aqueous solution may contain anions derived from water used for the hypochlorous acid aqueous solution. In this way, by containing anions in the hypochlorous acid aqueous solution, the anions exert a pH buffering function, and thus, rapid pH change of the hypochlorous acid aqueous solution can be effectively suppressed, and the pH of the hypochlorous acid aqueous solution can be stabilized. That is, if there is no anion as the buffer material as described above, a sharp change in pH may be caused. It can also be said that sodium hypochlorite and mineral acid, when brought into contact, will undergo a sharp drop in pH at their contact site, generating chlorine gas, reducing the total available chlorine, and in addition, putting the personnel at risk. In contrast, according to the present invention, the hypochlorous acid aqueous solution contains anions, whereby the above-described situation can be avoided.
In this case, the anion may be at least one of bicarbonate ion, sulfate ion, nitrate ion, and phosphate ion.
In order to solve the above problems, the present invention is a method for producing an aqueous hypochlorous acid solution, comprising a step 1 of purifying water without removing anions but removing cations from the water; and a2 nd step of mixing an inorganic acid and a hypochlorite with the water purified in the 1 st step or electrolyzing the water purified in the 1 st step to produce a hypochlorous acid aqueous solution.
According to the method for producing a hypochlorous acid aqueous solution of the present invention, when water as a raw material is purified, cations are removed from the water without removing anions, and therefore, anions having a pH buffering function are contained in the hypochlorous acid aqueous solution, and cations that cause the oxidative power of hypochlorous acid to be extracted can also be removed. In addition, when hydrochloric acid is added, the anion functions as a buffer material, and a rapid reaction with sodium hypochlorite can be suppressed.
Further, in the above-mentioned method for producing an aqueous hypochlorous acid solution, the mixing of water, the inorganic acid, and the hypochlorite may be performed by intermittently supplying the inorganic acid to the water and continuously supplying the hypochlorite to the diluted inorganic acid generated by the supply. In this way, by intermittently supplying the inorganic acid to water and continuously supplying the hypochlorite to the diluted inorganic acid generated by the supply, the hypochlorous acid generated by mixing the water, the inorganic acid, and the hypochlorite can be prevented from reacting with the inorganic acid again. This prevents the hypochlorous acid concentration of the hypochlorous acid aqueous solution from decreasing, and prevents the safety of the worker from decreasing by bubbling the gas generated by the reaction between the hypochlorous acid and the inorganic acid.
Further, the present invention is a manufacturing apparatus for manufacturing the hypochlorous acid aqueous solution, comprising: a1 st apparatus for performing a1 st step of purifying water by removing cations but not anions from the water; a2 nd unit for performing a2 nd step of mixing an inorganic acid and a hypochlorite with the water purified in the 1 st step or electrolyzing the water purified in the 1 st step to generate a hypochlorous acid aqueous solution; the 2 nd device includes: a pipe for supplying the water; an inorganic acid supply unit configured to intermittently supply the inorganic acid to the pipe for supplying the water; a hypochlorite supply unit for continuously supplying the hypochlorite to the water to which the inorganic acid has been supplied.
As an embodiment of the above invention, the supplying of the inorganic acid intermittently by the inorganic acid supplying portion also includes supplying the inorganic acid in a plurality of portions (dividing the entire amount of the supply in a plurality of portions). The continuous supply of hypochlorite by the hypochlorite supply unit also includes a one-time supply of hypochlorite (all hypochlorite is supplied together). Further, as the inorganic acid is supplied in plural times, the injection site of the inorganic acid may be divided into plural portions, or the inorganic acid may be injected in more precise amounts by setting a pump in plural times. On the other hand, for hypochlorite, the entire amount may be injected at one time.
In this way, by intermittently supplying the inorganic acid and continuously supplying the hypochlorite, the supplied inorganic acid can be prevented from contacting the hypochlorite at a high concentration, and thus the generation of gas by the inorganic acid can be suppressed.
Further, in the apparatus for producing a hypochlorous acid aqueous solution, the pipe may be an in-line stirrer having a stirring section for stirring the diluted inorganic acid. In this way, the piping is an in-line stirrer having a stirring section for stirring the diluted inorganic acid, whereby the diluted inorganic acid can be stirred by the stirring section to produce a diluted inorganic acid in which the inorganic acid is uniformly diluted, and the inorganic acid can be efficiently diluted without causing a reaction between the high-concentration inorganic acid and the hypochlorous acid.
The reference numerals in parentheses are those of corresponding components in the embodiments described below, and are shown as examples of the present invention.
Effects of the invention
According to the insect repellent of the present invention, an insect repellent containing a substance having an effect of repelling pests but having no insecticidal effect can be obtained. Further, according to the method and apparatus for producing a hypochlorous acid aqueous solution of the present invention, a hypochlorous acid aqueous solution having high quality and being less likely to deteriorate can be produced safely and efficiently.
Drawings
Fig. 1 is a flowchart for explaining a method for producing a hypochlorous acid aqueous solution according to an embodiment of the present invention.
FIG. 2 is a block diagram showing an apparatus for producing a hypochlorous acid aqueous solution according to an embodiment of the present invention.
FIG. 3 is a schematic view showing a first example of an apparatus for producing a hypochlorous acid aqueous solution.
FIG. 4 is a schematic view showing a second example of an apparatus for producing a hypochlorous acid aqueous solution.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The insect repellent of the present invention, the method for producing the hypochlorous acid aqueous solution of the present invention, the apparatus for producing the hypochlorous acid aqueous solution of the present invention, and the method for using the hypochlorous acid aqueous solution produced by these production methods and apparatuses will be described in the following order.
First, the insect repellent of the present invention will be described. The insect repellent of the present invention is composed of an aqueous hypochlorous acid solution. The hypochlorous acid concentration of the hypochlorous acid aqueous solution is 5ppm to 400ppm, and the pH is 4.0 to 7.0. Further, the hypochlorous acid aqueous solution contains bicarbonate ions (anions).
As described above, according to the above embodiment, since the insect repellent is composed of the hypochlorous acid aqueous solution, the insect repellent containing a substance having a pest repelling effect but no insecticidal effect can be obtained.
Further, according to the above embodiment, the hypochlorous acid concentration of the hypochlorous acid aqueous solution is 5ppm or more, whereby the insect repellent function of hypochlorous acid can be sufficiently exhibited, and the hypochlorous acid concentration of the hypochlorous acid aqueous solution is 400ppm or less, whereby the irritation of hypochlorous acid to the human body can be suppressed.
Further, according to the above embodiment, since the pH of the hypochlorous acid aqueous solution is 4.0 to 7.0, the hypochlorous acid aqueous solution can be maintained weakly acidic, and the irritation of the hypochlorous acid aqueous solution to the human body can be reduced. Further, since the pH of the hypochlorous acid aqueous solution is 4.0 to 7.0, the sterilization function of hypochlorous acid for abstracting electrons from germs and the virus inactivation function of hypochlorous acid for abstracting electrons from viruses can be improved.
In addition, according to the above embodiment, by containing bicarbonate ions (anions) in the hypochlorous acid aqueous solution, the bicarbonate ions exert a pH buffering function, and thus it is possible to suppress a change in pH of the hypochlorous acid aqueous solution and stabilize the pH of the hypochlorous acid aqueous solution.
Next, a method for producing a hypochlorous acid aqueous solution which can be used as the insect repellent of the present invention will be described with reference to fig. 1. The hypochlorous acid aqueous solution produced by the production method and the production apparatus described below can be used as the insect repellent, and can be used for other applications (for example, a disinfectant, a deodorant, and the like). Fig. 1 is a flowchart for explaining a method for producing a hypochlorous acid aqueous solution according to an embodiment of the present invention. The method for producing the hypochlorous acid aqueous solution shown in fig. 1 comprises: a purification step (1 ST step) ST1 of purifying water W as a raw material, and a production step (2 nd step) ST2 of producing a hypochlorous acid aqueous solution L1 from the water W purified in the purification step ST 1.
The purification step ST1 of water W is specifically a step of removing impurities (organic substances, metal ions) from water W. In addition, the purification step ST1 does not remove anions such as bicarbonate ions contained in the water W. The purification step ST1 includes: an organic matter removal step ST1-A for removing organic matter from the water W; and a metal ion removal step ST1-B of removing metal ions (cations) from the water W from which the organic substances have been removed in the organic substance removal step ST 1-A.
In the organic matter removing step ST1-a, organic matter is removed from the water W by passing the water W through a filter and recovering the organic matter contained in the water W with the filter. This prevents hypochlorous acid from reacting with organic substances in the hypochlorous acid aqueous solution L1 produced in the subsequent production step ST2, thereby preventing the hypochlorous acid concentration in the hypochlorous acid aqueous solution L1 from decreasing. Further, by reducing the organic matter concentration in the hypochlorous acid aqueous solution L1, the safety of the hypochlorous acid aqueous solution L1 to the human body can be improved.
In the metal ion removal step ST1-B, the water W from which the organic substances have been removed in the organic substance removal step ST1-a is supplied to a cation exchange resin, and the metal ions contained in the water W are adsorbed by the cation exchange resin, thereby removing the metal ions in the water W. The metal ions removed from the water W include sodium ions, heavy metal ions, and the like. Examples of heavy metal ions are iron ions.
In the metal ion removal step ST1-B, an apparatus for removing both cations and anions is not used in order to prevent anions such as bicarbonate ions from being removed from the hypochlorous acid aqueous solution L1. Specifically, amphoteric ion exchange resins, reverse osmosis membranes, and the like are not used.
The hypochlorous acid aqueous solution production step ST2 produces a hypochlorous acid aqueous solution L1 by mixing (mixing) water purified in the purification step ST1, hydrochloric acid (inorganic acid), and sodium hypochlorite (hypochlorite). Specifically, hydrochloric acid is added to water, and sodium hypochlorite is added to the water to which the hydrochloric acid is added. Thus, the reaction of the following reaction formula (1) occurs to generate hypochlorous acid.
[ solution 1]
HCl+NaOCl→HOCl+NaCl…(1)
Here, as shown in the following reaction formula (2), the hydrochloric acid reacts again with the hypochlorous acid produced in the production step ST2, and the hypochlorous acid decomposes to generate a chlorine gas. This reaction easily occurs in the case where the concentration of hydrochloric acid is high. Therefore, in the manufacturing process ST2, hydrochloric acid is first supplied to water to generate diluted hydrochloric acid, and then sodium hypochlorite is supplied to the diluted hydrochloric acid.
[ solution 2]
HOCl+HCl→Cl2+H2O…(2)
The hydrochloric acid also functions as a pH adjuster for the hypochlorous acid aqueous solution L1 produced in the hypochlorous acid aqueous solution production step ST 2. Therefore, the supply amount of hydrochloric acid is adjusted in the manufacturing process ST2 so that the pH of the hypochlorous acid aqueous solution L1 manufactured in the manufacturing process ST2 is within an appropriate range.
In the metal ion removal step ST1-B, the metal ions are removed from the water W, whereby the metal ion concentration of the finally produced hypochlorous acid aqueous solution L1 is reduced, and the safety of the hypochlorous acid aqueous solution L1 to the human body is improved.
Further, since the concentration of iron ions (metal ions) in the hypochlorous acid aqueous solution L1 is reduced, iron ions (metal ions) in the hypochlorous acid aqueous solution L1 can be prevented from reacting with hypochlorous acid as shown in the following reaction formulae (3) and (4), and the hypochlorous acid concentration can be prevented from being reduced.
[ solution 3]
HOCl+5H2O+2Fe2+→2Fe(OH)3+Cl-+5H+…(3)
[ solution 4]
HOCl+Fe2+→·OH+Cl-+Fe3+…(4)
Further, since the metal ion concentration of the hypochlorous acid aqueous solution L1 is reduced, the metal ions in the hypochlorous acid aqueous solution L1 can be prevented from reacting with the bicarbonate ions and hydrochloric acid. This prevents the hydrogen carbonate ion concentration in the hypochlorous acid aqueous solution L1 from decreasing, the pH buffering capacity from decreasing due to the bicarbonate ions from decreasing, and the generation of chloride salts (impurities) due to the reaction between the metal ions and (anions) such as chloride ions, bicarbonate ions, sulfate ions, nitrate ions, and phosphate ions.
In the purification step ST1, organic substances and metal ions are removed from the water W, and in the production step ST2, the mixing amounts of water, hydrochloric acid, and sodium hypochlorite are adjusted so that the hypochlorous acid concentration of the hypochlorous acid aqueous solution L1 produced in the production step ST2 is 5ppm to 400ppm, and the pH is 4.0 to 7.0.
As described above, according to the above embodiment, when water W as a raw material of the hypochlorous acid aqueous solution L1 is purified, metal ions (cations) are removed from the water W without removing bicarbonate ions or the like (anions), and thus the hypochlorous acid aqueous solution L1 can contain bicarbonate ions or the like (anions) having a pH buffering function and metal ions (cations) can be removed from the hypochlorous acid aqueous solution L1.
Further, according to the above embodiment, by intermittently supplying hydrochloric acid to water and continuously supplying sodium hypochlorite to the diluted hydrochloric acid generated by the supply, hypochlorous acid generated by mixing water, hydrochloric acid and sodium hypochlorite can be prevented from reacting with hydrochloric acid again. The term "intermittently supplying hydrochloric acid" as used herein includes dividing the entire amount into a plurality of portions, and supplying hydrochloric acid in small amounts at a time. Further, the continuous supply of sodium hypochlorite includes supplying the entire amount of sodium hypochlorite at one time (at one time).
In the above embodiment, the order of the organic matter removing step ST1-A and the metal ion removing step ST1-B may be changed as appropriate.
Further, in the above embodiment, hydrochloric acid was used as the inorganic acid in the manufacturing step ST2 of the hypochlorous acid aqueous solution, but carbonic acid, sulfuric acid, phosphoric acid, nitric acid, or the like may be used instead of hydrochloric acid.
In the above embodiment, sodium hypochlorite was used as the hypochlorite in the hypochlorous acid aqueous solution production step ST2, but magnesium hypochlorite, calcium hypochlorite, or the like may be used instead of sodium hypochlorite. The sodium hypochlorite is in a liquid state, and the magnesium hypochlorite and the calcium hypochlorite are in a granular state.
In the above embodiment, in the hypochlorous acid aqueous solution production step ST2, instead of a mode (mixing mode) in which water, hydrochloric acid, and sodium hypochlorite are mixed, a mode (electrolysis mode) in which an aqueous solution containing chloride ions (for example, an aqueous sodium chloride solution) is electrolyzed may be used to produce a hypochlorous acid aqueous solution.
Next, an apparatus for producing the hypochlorous acid aqueous solution will be described. As shown in fig. 2, the hypochlorous acid aqueous solution manufacturing apparatus 1 includes a purification apparatus 10 for purifying water and a mixing apparatus 100 for mixing sodium hypochlorite and hydrochloric acid in the purified water. Further, the purification apparatus 10 includes an organic matter removing filter 11 (organic matter removing means) and a cation exchange resin 12 (cation removing means). Here, the hypochlorous acid aqueous solution production apparatus 1 is an apparatus used in the hypochlorous acid aqueous solution production method shown in fig. 1. The purification apparatus 10 is an apparatus used in the water purification step ST1 shown in fig. 1. Further, the mixing apparatus 100 is an apparatus used in the hypochlorous acid aqueous solution production step ST2 shown in fig. 1. The organic matter removing filter 11 is an apparatus used in the organic matter removing step ST1-a shown in fig. 1. The cation exchange resin 12 is used in the metal ion removal step ST1-B shown in fig. 1.
Fig. 3 is a schematic diagram showing a first example of the mixing device 100. As shown in fig. 3, a mixing device 100-1 as a first example includes a pipe 2A having an agitation portion (on-line agitator), a water supply device 3 for supplying water W to the pipe 2A, a hydrochloric acid supply device 4 (inorganic acid supply device) for supplying hydrochloric acid a1 to the pipe 2A, and a sodium hypochlorite supply device 5 (hypochlorite supply device) for supplying sodium hypochlorite B to the pipe 2A. The mixing device 100-1 further includes a connection pipe 6 for connecting the pipe 2A and the hydrochloric acid supply device 4, a pump 7 provided in the connection pipe 6, and a back-flow prevention valve 8 for preventing the liquid flowing through the pipe 2A from flowing out to the connection pipe 6 side, and further includes a connection pipe 16 for connecting the pipe 2A and the sodium hypochlorite supply device 5, a pump 17 provided in the connection pipe 16, and a back-flow prevention valve 18 for preventing the liquid flowing through the pipe 2A from flowing out to the connection pipe 16 side.
The pipe 2A is used for producing a hypochlorous acid aqueous solution L1 by mixing water W, hydrochloric acid a1, and sodium hypochlorite B. Specifically, the pipe 2A includes a water supply unit 2A for supplying water W from the water supply device 3, a hydrochloric acid supply unit 2B for supplying hydrochloric acid a1 from the hydrochloric acid supply device 4, a sodium hypochlorite supply unit 2c for supplying sodium hypochlorite B from the sodium hypochlorite supply device 5, a stirring unit 2d for stirring the water W, the hydrochloric acid a1, and the sodium hypochlorite B, and a discharge unit 2e for discharging the produced sodium hypochlorite aqueous solution L1 to the outside of the system of the pipe 2A.
Further, from the upstream side to the downstream side of the flow of the water W in the pipe 2A, a water supply part 2A, a hydrochloric acid supply part 2b, a sodium hypochlorite supply part 2c, a stirring part (inline stirrer) 2d, and a discharge part 2e are arranged in this order. Thus, in the pipe 2A, the water W supplied from the water supply unit 2A is mixed with the hydrochloric acid a1 supplied from the hydrochloric acid supply unit 2B to generate the diluted hydrochloric acid a2, and the diluted hydrochloric acid a2 is mixed with the sodium hypochlorite B supplied from the sodium hypochlorite supply unit 2c to form a mixed solution M. Further, the mixed solution M is stirred in the stirring section 2d to produce a hypochlorous acid aqueous solution L1 containing hypochlorous acid. The generated hypochlorous acid aqueous solution L1 is discharged from the discharge portion 2e to the outside of the system of the pipe 2A.
The stirring section 2d is a section for stirring the introduced mixed solution M, and may be configured to have a stationary guide blade (not shown) as an example. In this case, the mixed liquid M introduced into the stirring section 2d is introduced by the guide blade and thus rotates. Thus, the mixed solution M is stirred, and hydrochloric acid and sodium hypochlorite contained in the mixed solution M react with each other to generate hypochlorous acid. The stirring section 2d is not an essential component, and the stirring section 2d may be omitted. Further, the specific configuration of the stirring section 2d is not limited to the configuration including the guide blade described above, and may be a configuration without a guide blade as long as the mixed liquid M can be stirred.
The connection pipe 6 is a hollow pipe connecting the hydrochloric acid supply unit 2b of the pipe 2A and the hydrochloric acid supply device 4, and guides the hydrochloric acid a1 supplied from the hydrochloric acid supply device 4 to the hydrochloric acid supply unit 2 b.
The pump 7 is provided for adjusting the amount of hydrochloric acid a1 supplied from the hydrochloric acid supply device 4 to the hydrochloric acid supply unit 2b of the pipe 2A. The pump 7 supplies the hydrochloric acid a1 flowing through the connection pipe 6 to the hydrochloric acid supply unit 2b in small amounts or in predetermined amounts at a time, and intermittently supplies the hydrochloric acid a1 to the hydrochloric acid supply unit 2 b.
The backflow prevention valve 8 prevents the liquid flowing inside the pipe 2A from flowing out of the hydrochloric acid supply unit 2 b. In the backflow prevention valve 8, the connection pipe 6 that supplies the hydrochloric acid a1 supplied from the hydrochloric acid supply device 4 to the hydrochloric acid supply unit 2b penetrates inside.
The connection pipe 16 is a hollow pipe connecting the sodium hypochlorite supply unit 2c of the pipe 2A and the sodium hypochlorite supply device 5, and guides the sodium hypochlorite B supplied from the sodium hypochlorite supply device 5 to the sodium hypochlorite supply unit 2 c.
The pump 17 is provided for adjusting the amount of sodium hypochlorite B supplied from the sodium hypochlorite supply device 5 to the sodium hypochlorite supply part 2c of the pipe 2A. The pump 17 supplies the entire amount of sodium hypochlorite B flowing through the connection pipe 16 to the sodium hypochlorite supply part 2c at one time, and continuously supplies sodium hypochlorite B to the sodium hypochlorite supply part 2 c.
The backflow prevention valve 18 prevents the liquid flowing inside the pipe 2A from flowing out of the sodium hypochlorite supply part 2 c. In the backflow prevention valve 18, the connection pipe 16 for supplying sodium hypochlorite B supplied from the sodium hypochlorite supply device 5 to the sodium hypochlorite supply unit 2c is inserted inside.
Next, a second example of the mixing device 100 will be described. In the description of the second example and the corresponding drawings, the same or corresponding components as those of the first example are denoted by the same reference numerals, and detailed description thereof will be omitted below. The matters other than those described below and the matters other than those shown in the drawings are the same as those in the first example.
Fig. 4 is a diagram showing a mixing device 100-2 of the second embodiment. The mixing device 100-2 shown in fig. 4 includes a pipe 2B instead of the pipe 2A included in the mixing device 100-1 shown in fig. 3. This pipe 2B differs from the pipe 2A in that it has a first stirring section (inline stirrer) 2f between the hydrochloric acid supply section 2B and the sodium hypochlorite supply section 2 c. The first stirring section 2f has the same structure and function as the stirring section 2d in the mixing device 100-1 shown in fig. 3. Further, in the mixing device 100-2, the stirring section 2d in the pipe 2A of the mixing device 100-1 is the second stirring section 2 d.
Further, the water supply unit 2a, the hydrochloric acid supply unit 2B, the first stirring unit 2f, the sodium hypochlorite supply unit 2c, the second stirring unit 2d, and the discharge unit 2e are arranged in this order from the upstream side to the downstream side of the flow of the water W in the pipe 2B. Thus, in the pipe 2B, the water W supplied from the water supply unit 2a is mixed with the hydrochloric acid a1 supplied from the hydrochloric acid supply unit 2B to generate the diluted hydrochloric acid a2, the diluted hydrochloric acid a2 is stirred by the first stirring unit 2f to become the diluted hydrochloric acid A3, and the diluted hydrochloric acid A3 is mixed with the sodium hypochlorite B supplied from the sodium hypochlorite supply unit 2c to form the mixed solution M. Further, the mixed solution M is stirred in the second stirring section 2d, thereby forming a hypochlorous acid aqueous solution L1 containing hypochlorous acid. The generated hypochlorous acid aqueous solution L1 is discharged from the discharge portion 2e to the outside of the system of the pipe 2B.
As described above, according to the above embodiment, the purification apparatus 10 can remove cations without removing anions from the water W, thereby removing cations that cause the oxidizing power for removing hypochlorous acid from the water W while containing anions having a pH buffering function in the water W.
By removing the cations (metal ions) in this manner, the cations can be prevented from reacting with hypochlorous acid and depriving oxidizing power. Further, by removing cations, it is possible to prevent the formation of salts of metal ions and anions upon drying after the spraying application of an insect repellent, a disinfectant or the like using the hypochlorous acid aqueous solution produced by the above-described production method and production apparatus. In particular, when calcium salt and magnesium salt are produced from calcium ion and magnesium ion contained in tap water, it is difficult to wipe them off because of insolubility, but as described above, the production of salt can be prevented, so that such a problem does not occur.
Further, by intermittently supplying the hydrochloric acid a1 to the water W supplied to the pipes 2A and 2B and continuously supplying the sodium hypochlorite B to the diluted hydrochloric acids a2 and A3 generated by supplying the hydrochloric acid a1 to the water W, the hypochlorous acid generated by mixing the water, the hydrochloric acid, and the hypochlorite can be prevented from reacting with the hydrochloric acid again. This prevents the hypochlorous acid concentration of the hypochlorous acid aqueous solution L1 from decreasing, and prevents the safety of the operator from decreasing because gas generated by the reaction between hypochlorous acid and hydrochloric acid is formed into bubbles.
In the mixing device 100(100-1, 100-2) of the above embodiment, the pump 7 supplies the hydrochloric acid a1 to the pipe 2A to which the water W is supplied, whereby the intermittent supply of the hydrochloric acid a1 can be facilitated.
In the mixing device 100-2 of the above embodiment, since chlorine gas is generated by contacting sodium hypochlorite in a state where the concentration of hydrochloric acid is high, in order to avoid this, the diluted hydrochloric acid is stirred in the first stirring section 2f in advance to make the concentration uniform, and then the sodium hypochlorite is mixed. However, in addition to this, the hydrochloric acid may be supplied in small portions at a time by providing a plurality of hydrochloric acid supply portions 2b for supplying hydrochloric acid, or may be supplied in small portions at a time by providing a pump.
Next, an example of a method for using the hypochlorous acid aqueous solution will be described. In the present specification, the hypochlorous acid aqueous solution refers to the hypochlorous acid aqueous solution produced by the method for producing a hypochlorous acid aqueous solution according to the present invention and the production apparatus. Specifically, the aqueous hypochlorous acid solution is shown in FIG. 1 as L1.
Here, as an example of the use of the hypochlorous acid aqueous solution L1, a case where the hypochlorous acid aqueous solution L1 is used as a pest exterminator will be described. First, a hypochlorous acid aqueous solution is contained in a container capable of spraying an internal liquid. And then, spraying hypochlorous acid aqueous solution on the planted white fungus in a plastic greenhouse for planting the white fungus.
Here, when the hypochlorous acid aqueous solution is sprayed to bacteria or viruses, hypochlorous acid contained in the hypochlorous acid aqueous solution takes electrons from the bacteria or viruses, and the bacteria or viruses are inactivated, and the hypochlorous acid reacts as shown in the following reaction formula (5), and is separated into chloride ions and water. Thus, hypochlorous acid sprayed to the outside of the container becomes harmless ions (chlorine ions, water), and does not adversely affect the human body and tremella.
[ solution 5]
HClO+H++2e-→Cl-H2O…(5)
Moreover, harmful organisms (the auricularia auricula mosquito) can be expelled from the cultivated tremella. The Esperious acutus is a harmful organism, and absorbs liquid generated by tremella during planting, so that the tremella generates black spots, and the commercial value of the tremella is reduced. However, by spraying an aqueous hypochlorous acid solution onto white fungus, the muscovy fungus on the white fungus can be repelled.
The hypochlorous acid aqueous solution of the present embodiment can be widely used as an insect repellent for other purposes than agricultural purposes as exemplified above. For example, it can be used for repelling insects in food processing plants, and fly-proofing in general household bran beds.
While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical ideas described in the claims and the specification and drawings.
Claims (9)
1. An insect repellent characterized by containing an aqueous hypochlorous acid solution.
2. The insect repellent according to claim 1,
the hypochlorous acid concentration of the hypochlorous acid aqueous solution is 5ppm to 400 ppm.
3. The insect repellent according to claim 1 or 2,
the pH value of the hypochlorous acid aqueous solution is 4.0 to 7.0.
4. An insect repellent according to any one of claims 1 to 3,
the aqueous hypochlorous acid solution contains anions derived from water supplied to the aqueous hypochlorous acid solution.
5. The insect repellent according to claim 4,
the anion is at least one of bicarbonate ion, sulfate ion, nitrate ion and phosphate ion.
6. A method for producing an aqueous hypochlorous acid solution,
the method for producing the hypochlorous acid aqueous solution comprises the following steps:
a first step of purifying water by removing cations but not anions from the water; and
and a2 nd step of mixing an inorganic acid and a hypochlorite with the water purified in the 1 st step, or electrolyzing the water purified in the 1 st step to produce a hypochlorous acid aqueous solution.
7. The method for producing an aqueous hypochlorous acid solution according to claim 6, wherein,
the mixing of the water, the inorganic acid, and the hypochlorite in the step 2 is performed by:
intermittently supplying the inorganic acid to the water,
continuously supplying the hypochlorite to a dilute inorganic acid produced by the supply of the inorganic acid.
8. A hypochlorous acid aqueous solution manufacturing apparatus for manufacturing a hypochlorous acid aqueous solution,
the manufacturing apparatus is characterized by comprising:
a1 st apparatus for performing a1 st step of purifying water by removing cations but not anions from the water; and
a2 nd apparatus for performing a2 nd step of mixing an inorganic acid and a hypochlorite with the water purified in the 1 st step or electrolyzing the water purified in the 1 st step to generate a hypochlorous acid aqueous solution,
the 2 nd device includes:
a pipe for supplying the water;
an inorganic acid supply unit configured to intermittently supply the inorganic acid to the pipe for supplying the water;
a hypochlorite supply unit configured to continuously supply the hypochlorite to the water to which the inorganic acid has been supplied.
9. The apparatus for producing an aqueous hypochlorous acid solution according to claim 8, wherein,
the piping has a stirring section for stirring the diluted inorganic acid.
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| JPWO2019139134A1 (en) | 2021-04-30 |
| CN116530497A (en) | 2023-08-04 |
| JP7362487B2 (en) | 2023-10-17 |
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