GB2554099A - Use of gas mixtures comprising oxygen for the production of ozone - Google Patents
Use of gas mixtures comprising oxygen for the production of ozone Download PDFInfo
- Publication number
- GB2554099A GB2554099A GB1615996.4A GB201615996A GB2554099A GB 2554099 A GB2554099 A GB 2554099A GB 201615996 A GB201615996 A GB 201615996A GB 2554099 A GB2554099 A GB 2554099A
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- Prior art keywords
- vol
- ozone
- oxygen
- gas
- oxide
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000007789 gas Substances 0.000 title claims abstract description 77
- 239000000203 mixture Substances 0.000 title claims abstract description 67
- 239000001301 oxygen Substances 0.000 title claims abstract description 43
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 43
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract 8
- 238000004519 manufacturing process Methods 0.000 title description 8
- 238000000034 method Methods 0.000 claims abstract description 41
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 35
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 18
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims abstract description 10
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 9
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000001954 sterilising effect Effects 0.000 claims abstract description 8
- 230000005495 cold plasma Effects 0.000 claims abstract description 6
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 24
- 239000001272 nitrous oxide Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000000376 reactant Substances 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 9
- 230000005865 ionizing radiation Effects 0.000 abstract description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 235000013305 food Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000011109 contamination Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 244000144977 poultry Species 0.000 description 2
- 238000011012 sanitization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000004113 cell culture Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 239000010908 plant waste Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/20—Gaseous substances, e.g. vapours
- A61L2/202—Ozone
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/26—Accessories or devices or components used for biocidal treatment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
-
- 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
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/13—Ozone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/12—Apparatus for isolating biocidal substances from the environment
- A61L2202/121—Sealings, e.g. doors, covers, valves, sluices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/12—Apparatus for isolating biocidal substances from the environment
- A61L2202/122—Chambers for sterilisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/20—Targets to be treated
- A61L2202/24—Medical instruments, e.g. endoscopes, catheters, sharps
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/60—Feed streams for electrical dischargers
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/60—Feed streams for electrical dischargers
- C01B2201/64—Oxygen
Abstract
A method of preparing ozone (O3) comprising: providing a gas mixture comprising: a) 5 vol.% to 50 vol.% oxygen; b) 50 vol.% to 95 vol.% of an oxide gas. The gas mixture is then subjected to an ozone generating process to produce ozone. The use of such a composition as a feedstock for an O3 generating process is also described. The O3 generating process may be dielectric barrier discharge, corona discharge ionizing radiation or cold plasma. The oxide gas may be one or a mixture of carbon dioxide (CO2) carbon monoxide (CO) nitric oxide (NO) nitrogen dioxide (NO2). The gas may comprise 15-25 vol % oxygen and 75-85 vol % oxide gas. The so produced O3 can be used in sterilization of medical devices.
Description
(71) Applicant(s):
Anacail Limited
The Thompson Building, University of Glasgow, Strathclyde, GLASGOW, G12 8QQ, United Kingdom (56) Documents Cited:
US 5810978 A US 3214364 A
US 2850446 A US 20040223893 A1 (58) Field of Search:
INT CL C01B, C25B
Other: WPI, EPODOC, XPESP, XSPRUNG, TXTE (72) Inventor(s):
David Barton Hugh Potts (74) Agent and/or Address for Service:
HGF Limited
Document Handling - HGF - (Glasgow), 1 City Walk, LEEDS, LS11 9DX, United Kingdom (54) Title of the Invention: Use of gas mixtures comprising oxygen for the production of ozone Abstract Title: A method of preparing ozone with a mixed gas feed (57) A method of preparing ozone (O3) comprising: providing a gas mixture comprising: a) 5 vol.% to 50 vol.% oxygen; b) 50 vol.% to 95 vol.% of an oxide gas. The gas mixture is then subjected to an ozone generating process to produce ozone. The use of such a composition as a feedstock for an O3 generating process is also described. The O3 generating process may be dielectric barrier discharge, corona discharge ionizing radiation or cold plasma. The oxide gas may be one or a mixture of carbon dioxide (CO2) carbon monoxide (CO) nitric oxide (NO) nitrogen dioxide (NO2). The gas may comprise 15-25 vol % oxygen and 75-85 vol % oxide gas. The so produced O3 can be used in sterilization of medical devices.
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Use of gas mixtures comprising oxygen for the production of ozone
Field of the Invention
The present invention relates to a method of producing ozone. More particularly, the present invention relates to method of producing ozone using a gas mixture comprising oxygen and oxide gases and the use of specific gas mixtures as feedstock in an ozone generating process to convert oxygen to ozone.
Background
Ozone has been used in order to reduce the bioburden in foodstuff, medical devices and water sanitization for many years. As a strong oxidizing agent, ozone is capable of inactivating a wide range of microorganisms and has been found difficult for microorganisms to build up resistance to.
A key advantage of ozone is that it is created from oxygen gas and decays naturally back to oxygen leaving no other residues. This renders ozone environmentally benign compared to other compounds or technologies used alternatively. However, this natural decay of ozone prevents remote facility production with transport of ozone to the point of use. Consequently, ozone is typically generated on demand and in situ.
Most applications for ozone require volumetric concentrations of ozone gas of above 10,000 ppm to provide sufficient amounts of ozone to obtain the desired effect. For example, a medical device sterilizer may use an ozone exposure at 30,000 to 40,000 ppm for 4 hours to sufficiently sterilize reusable medical devices. However, there are also applications which allow for lower ozone concentrations. Ozone generators used for water sanitization use pure oxygen and generate similar concentrations in the gas phase before the resulting ozone is introduced into the water.
In order to achieve such high ozone concentrations, the ozone generators typically use high (kV) voltage corona, dielectric barrier (DBD), similar discharges or ionizing radiation which operate in pure oxygen. Generating a diffuse plasma state in oxygen, a proportion of the oxygen molecules are broken down to then recombine to yield the ozone.
The combination of high voltage sources, plasma but also pure oxygen itself present a fire and explosion hazard which has to be controlled by adopting suitable procedures and equipment. This poses a significant disadvantage which can prevent the use of ozone in certain applications or at certain plants where this fire risk is unacceptable.
It has been attempted to alleviate this problem by diluting oxygen with nitrogen or argon or even by using air. However, ozone concentrations resulting from these gas mixtures were reduced significantly due in part to side reactions of singlet oxygen with nitrogen to form NOx.
Another method for reducing the bioburden employs ionizing radiation sterilization, for example ultraviolet, gamma, electron beam or X ray irradiation. However, certain materials especially when frequent sterilisation is required can be damaged. Typically, ozone is created as a by-product in these processes. Increase in the ozone concentration may lead to an improved and accelerated sterilization and could reduce the frequency and intensity of irradiation treatment.
It is, therefore, an object of the present invention to obviate or mitigate at least one or more of the aforementioned problems.
It is a further object of the present invention to provide a safer method of producing ozone from oxygen comprising gas mixtures in which flammable material is less likely to combust than in pure oxygen while the ozone yields are comparable.
It is a further object of the present invention to provide an ionizing radiation method for sterilization that minimizes or even avoids damage to the materials that are being sterilized.
Detailed Description
Surprisingly it has been found that a method of preparing ozone comprising: providing a gas mixture comprising 5 vol% to 50 vol% oxygen, 50 vol% to 95 vol% of an oxide gas, and subjecting the gas mixture to an ozone generating process to produce ozone, alleviates the aforementioned problems.
Ozone generating processes
Methods useful for the production of ozone according to the present invention using the specific oxygen containing gas mixtures are among others dielectric barrier discharge, corona discharge; ionizing irradiation, for example in the form of ultraviolet light, gamma, electron beam or X ray irradiation; and cold plasma. The corona discharge method uses a power supply to produce an electrical discharge across a dielectric, and an air gap. The dielectric is used to diffuse the discharge across a large area. The oxygen molecules passing through the air gap are exposed to the electrical discharge and are split into ozone. For production of ozone using ultraviolet light, an oxygen containing carrier gas is passed over an ultraviolet light emitting lamp. In the cold plasma method, oxygen containing gas is exposed to a plasma created by dielectric barrier discharge. The oxygen molecules are split into single atoms which then recombine in triplets to form ozone. Ozone may further be formed from oxygen by electrical discharges and by action of high energy electromagnetic radiation.
In a preferred embodiment, the ozone generating process is dielectric barrier discharge.
In embodiments, the gas mixture used for the production of ozone in accordance with the present invention comprises oxygen in an amount of 5 to 50 vol%. The reduced oxygen content leads to a significant reduction in the flammability of the gas mixture and therefore allows for a wider use. In a preferred embodiment, the gas mixture comprises 10 to 30 vol% of oxygen and in a most preferred embodiment 15 to 25 vol%.
As a further component, the gas mixture used in the present invention comprises oxide gas. The oxide gas is preferably selected from the group consisting of carbon monoxide (CO), carbon dioxide (CO2), nitrous oxide (N2O), nitric oxide (NO), nitrogen dioxide (NO2) and any mixtures thereof. In a preferred embodiment, the gas mixture comprises carbon dioxide, nitrous oxide or any mixture thereof as the oxide gas.
These oxide gases contribute to the formation of ozone in the ozone generating process, as these gases readily give up oxygen atoms thus contributing to the ozone yield.
In embodiments, the gas mixture comprises 50 vol% to 95 vol% of oxide gas, in a preferred embodiment 70 vol% to 90 vol% and in a most preferred embodiment 75 vol% to 85 vol%.
In a preferred embodiment, the gas mixture consists of oxygen and oxide gas.
In an embodiment, the gas mixture comprises
a) 5 vol.% to 50 vol.% oxygen; and
b) 50 vol.% to 95 vol.% of an oxide gas;
with the proviso that these two percentages add up to 100 vol%.
In a further embodiment, the gas mixture comprises
a) 10 vol.% to 30 vol.% oxygen;
b) 70 vol.% to 90 vol.% of an oxide gas selected from the group consisting of carbon monoxide, carbon dioxide, nitrous oxide, nitric oxide, nitrogen dioxide and any mixtures thereof;
with the proviso that these two percentages add up to 100 vol%.
In a further embodiment, the gas mixture comprises
a) 15 vol.% to 25 vol.% oxygen;
b) 75 vol.% to 85 vol.% of an oxide gas;
with the proviso that these two percentages add up to 100 vol%.
In a further embodiment, the gas mixture comprises
a) 15 vol.% to 20 vol.% oxygen;
b) 75 vol.% to 85 vol.% of an oxide gas selected from carbon dioxide, nitrous oxide or any mixtures thereof;
with the proviso that these two percentages add up to 100 vol%.
In a further embodiment, the method of preparing ozone further comprises the step of sterilizing an article with the resulting ozone. The article may be a medical device such as endoscopes, sets of instruments, implantable devices, life science consumables and single use devices such as microtitre plates, syringes, dressings, disposable blades, disposable scissors, disposable needles; sample collection tubes, preparation vessels such as centrifuge cubes; cell culture equipment such as flasks, dishes and bioreactors; biological equipment such as all appliances for peptide and protein preparation including powdered media.
Further, the article may be a contaminated space such as fume cupboards, glove boxes and other equipment where contamination can be an issue. Contamination in the sense of the present invention relates to biological contamination by microorganisms such as bacteria, viruses, yeasts, moulds, spores, vegetative cells and parasites.
Further, the article may be a foodstuff in food processing to reduce the bioburden and to increase shelf life. For example, fruit and vegetables may be treated with ozone in food purifiers or washers to improve food surface hygiene. But also sanitation of food plant equipment, reuse of waste water, lowering of biological oxygen demand and chemical oxygen demand of food plant waste can be achieved with ozone generated according to the present invention. In this regard, waste water treatment is not restricted to such of the food industry.
Further, ozone generated according to the present invention can be used for disinfecting meat based foodstuffs and production plants and wastes such as recycled poultry chill water and disinfection of poultry carcasses
Further, the method of the present invention may be used for decontaminating semi enclosed drain systems. A cap may be placed over for example a semi enclosed drain with the cap comprising an ozone generator. The gas mixture or composition is pumped into the trapped volume between the cap and the water sump of the drains and the ozone is generated within this trapped volume between the cap and the water sump.
Sterilization may be carried out by placing the article directly into the reaction chamber where ozone is generated from the reactants/gas mixture or providing the article in a sealed pack which comprises the gas mixture before placing the sealed pack into the reaction chamber. This has the added benefit that no further packaging has to be done under sterile conditions.
A further aspect of the present invention is the use of a composition comprising 5 vol% to 50 vol% oxygen, 50 vol% to 95 vol% of an oxide gas as reactant in the preparation of ozone.
Reactant in the sense of the present invention is to be understood as the chemical material that undergoes chemical reaction to yield the ozone.
The composition can be provided to the reaction chamber as a feedstock, i.e. a premix of the different components which will form the gas mixture within the reaction chamber for preparation of the ozone. The composition may be provided as a premix in a cylinder that can easily be transported and stored. The composition may be stored and/or transported as a liquefied composition or in the gaseous state. Further, the different components of the composition can be added through different channels to be mixed only within the reaction chamber before being subjected to the ozone generating process.
The feedstock may further be provided directly within a medical device. For example, the feedstock may be located in an automated endoscope reprocessor. The ozone required for sterilisation of the endoscope can be produced directly within the reprocessor.
The composition may be the gas mixture as described with regard to the present invention. The feedstock can either be in the gaseous aggregation state or liquefied.
As ozone generating process any of the processes mentioned in the present application can be used.
In a preferred embodiment, the composition used as reactant in the preparation of ozone comprises 15 vol% to 25 vol% of oxygen and 75 vol% to 85 vol% of an oxide gas selected from carbon dioxide, nitrous oxide or any mixtures thereof, with the proviso that these two percentages add up to 100 vol%.
Examples
Example 1
Using a 60mm diameter electrode, a dielectric barrier discharge was generated at 100% duty cycle, 21kHz supply frequency and 3.80kV electrode voltage. A range of gas mixtures were prepared containing different ratios of oxygen and carbon dioxide gases. The gas mixtures were prepared in sealed polythene bags which were then subjected to the dielectric barrier discharge to generate the ozone within the bag.
A discharge was run for a fixed 60s period, after which the ozone concentration was measured using a 2B Technologies 106-MH ozone meter.
In Figure 1, the ozone concentration obtained from the different mixtures is depicted against the increasing amount of carbon dioxide or nitrogen in the gas mixture (reactant).
As shown in Figure 1 and as expected, the ozone concentration decreases with lower amounts of oxygen in the reaction chamber. However, as the oxide gases contribute to the ozone yield, even with lower oxygen concentrations sufficient amounts of ozone can be produced at lower oxygen content in the gas mixture as compared to gas mixtures comprising oxygen and nitrogen.
Claims (15)
1. A method of preparing ozone comprising:
- providing a gas mixture comprising
a) 5 vol.% to 50 vol.% oxygen;
b) 50 vol.% to 95 vol.% of an oxide gas; and
- subjecting the gas mixture to an ozone generating process to produce ozone.
2. A method of preparing ozone according to claim 1, wherein the oxide gas is selected from the group consisting of carbon monoxide, carbon dioxide, nitrous oxide, nitric oxide, nitrogen dioxide and any mixtures thereof.
3. A method of preparing ozone according any one of claims 1 or 2, wherein the oxide gas is selected from carbon dioxide, nitrous oxide or any mixtures thereof.
4. A method of preparing ozone according to any one of claims 1 to 3, wherein the ozone generating process is selected from dielectric barrier discharge, corona discharge, ionizing irradiation or cold plasma.
5. A method of preparing ozone according to any one of claims 1 to 4, wherein the gas mixture comprises
a) 15 vol% to 25 vol% of oxygen; and
b) 75 vol% to 85 vol% of an oxide gas;
with the proviso that these two percentages add up to 100 vol%.
6. A method of preparing ozone according to any one of claims 1,4 to 5, wherein the gas mixture comprises
a) 15 vol% to 25 vol% of oxygen; and
b) 75 vol% to 85 vol% of an oxide gas selected from carbon dioxide, nitrous oxide and any mixtures thereof;
with the proviso that these two percentages add up to 100 vol%.
7. A method of preparing ozone according to any one of claims 1 to 6, further comprising the step of sterilizing an article with the resulting ozone.
8. A method of preparing ozone according to claim 7, wherein the article is a medical device.
9. Use of a composition comprising
a) 5 vol.% to 50 vol.% oxygen;
b) 50 vol.% to 95 vol.% of an oxide gas; as reactant in the preparation of ozone.
10. Use according to claim 9, wherein the composition is a feedstock.
11. Use according to claim 10, wherein the feedstock is located in an automated endoscope reprocessor.
12. Use according to any one of claims 9 to 11, wherein the oxide gas is selected from the group consisting of carbon monoxide, carbon dioxide, nitrous oxide, nitric oxide, nitrogen dioxide and any mixtures thereof.
13. Use according to any one of claims 9 to 11, wherein the oxide gas is selected from carbon dioxide, nitrous oxide or any mixtures thereof.
14. Use according to any one of claims 9 to 13, wherein ozone is prepared using an ozone generating process selected from dielectric barrier discharge, corona discharge, ionizing irradiation or cold plasma.
15. Use according to any one of claims 9 to 11, or 14, wherein the composition comprises
a) 15 vol% to 25 vol% of oxygen; and
b) 75 vol% to 85 vol% of an oxide gas selected from carbon dioxide, nitrous oxide or any mixtures thereof;
with the proviso that these two percentages add up to 100 vol%.
Intellectual
Property
Office
Application No: Claims searched:
GB1615996.4
1-7
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1615996.4A GB2554099A (en) | 2016-09-20 | 2016-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
CN201780058016.XA CN109790023A (en) | 2016-09-20 | 2017-09-20 | Admixture of gas comprising oxygen is used for the application of ozone production |
EP17777319.9A EP3515860A1 (en) | 2016-09-20 | 2017-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
US16/330,568 US20210290803A1 (en) | 2016-09-20 | 2017-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
KR1020197010294A KR20190062435A (en) | 2016-09-20 | 2017-09-20 | For the production of ozone in a gas mixture containing oxygen |
PCT/GB2017/052793 WO2018055358A1 (en) | 2016-09-20 | 2017-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
JP2019513330A JP2019534229A (en) | 2016-09-20 | 2017-09-20 | Use of oxygen-containing gas mixtures to produce ozone |
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GB1615996.4A GB2554099A (en) | 2016-09-20 | 2016-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
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GB201615996D0 GB201615996D0 (en) | 2016-11-02 |
GB2554099A true GB2554099A (en) | 2018-03-28 |
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GB1615996.4A Withdrawn GB2554099A (en) | 2016-09-20 | 2016-09-20 | Use of gas mixtures comprising oxygen for the production of ozone |
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US (1) | US20210290803A1 (en) |
EP (1) | EP3515860A1 (en) |
JP (1) | JP2019534229A (en) |
KR (1) | KR20190062435A (en) |
CN (1) | CN109790023A (en) |
GB (1) | GB2554099A (en) |
WO (1) | WO2018055358A1 (en) |
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ES2953066T3 (en) * | 2019-10-04 | 2023-11-07 | Air Liquide | Treatment of the carcass of an animal after slaughter |
KR20230075679A (en) * | 2021-11-23 | 2023-05-31 | 한국핵융합에너지연구원 | High-purity no2 gas generator and high-concentration activated water and fertilizer water manufacturing device based on nitrate using plasma |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850446A (en) * | 1956-12-05 | 1958-09-02 | Welsbach Corp | Methods for ozone generation |
US3214364A (en) * | 1961-07-07 | 1965-10-26 | Emery Industries Inc | Ozone generator |
US5810978A (en) * | 1995-11-27 | 1998-09-22 | Sumitomo Precision Products Co., Ltd. | Method of reducing metallic impurities in ozone gas piping |
US20040223893A1 (en) * | 2003-05-09 | 2004-11-11 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Ozone generator |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US6955786B2 (en) * | 1997-12-23 | 2005-10-18 | Cosmed Group, Inc. | Gaseous blend of CO2 and Ox and its use for biological burden reduction |
TW200528390A (en) * | 2004-02-25 | 2005-09-01 | Toshiba Mitsubishi Elec Inc | Apparatus and method of producing ozone gas |
US20110268850A1 (en) * | 2010-04-30 | 2011-11-03 | Vashui Rasanayagam | Modified atmosphere packaging gas, method for non-thermal plasma treatment of article, and article of manufacture for use therein |
BR112013023166B1 (en) * | 2011-03-11 | 2019-10-22 | Purdue Research Foundation | system and method of sterilizing an object |
-
2016
- 2016-09-20 GB GB1615996.4A patent/GB2554099A/en not_active Withdrawn
-
2017
- 2017-09-20 JP JP2019513330A patent/JP2019534229A/en active Pending
- 2017-09-20 WO PCT/GB2017/052793 patent/WO2018055358A1/en active Search and Examination
- 2017-09-20 CN CN201780058016.XA patent/CN109790023A/en active Pending
- 2017-09-20 EP EP17777319.9A patent/EP3515860A1/en not_active Withdrawn
- 2017-09-20 KR KR1020197010294A patent/KR20190062435A/en unknown
- 2017-09-20 US US16/330,568 patent/US20210290803A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2850446A (en) * | 1956-12-05 | 1958-09-02 | Welsbach Corp | Methods for ozone generation |
US3214364A (en) * | 1961-07-07 | 1965-10-26 | Emery Industries Inc | Ozone generator |
US5810978A (en) * | 1995-11-27 | 1998-09-22 | Sumitomo Precision Products Co., Ltd. | Method of reducing metallic impurities in ozone gas piping |
US20040223893A1 (en) * | 2003-05-09 | 2004-11-11 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Ozone generator |
Also Published As
Publication number | Publication date |
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CN109790023A (en) | 2019-05-21 |
US20210290803A1 (en) | 2021-09-23 |
GB201615996D0 (en) | 2016-11-02 |
EP3515860A1 (en) | 2019-07-31 |
WO2018055358A1 (en) | 2018-03-29 |
JP2019534229A (en) | 2019-11-28 |
KR20190062435A (en) | 2019-06-05 |
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