WO2020245047A1 - Filtre pour purificateur d'air comprenant un composant de neutralisation des mauvaises odeurs - Google Patents

Filtre pour purificateur d'air comprenant un composant de neutralisation des mauvaises odeurs Download PDF

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Publication number
WO2020245047A1
WO2020245047A1 PCT/EP2020/065016 EP2020065016W WO2020245047A1 WO 2020245047 A1 WO2020245047 A1 WO 2020245047A1 EP 2020065016 W EP2020065016 W EP 2020065016W WO 2020245047 A1 WO2020245047 A1 WO 2020245047A1
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WO
WIPO (PCT)
Prior art keywords
filter
air
filter according
metals
air purifier
Prior art date
Application number
PCT/EP2020/065016
Other languages
English (en)
Inventor
Wen Kevin LUO
Original Assignee
Blueair Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Blueair Ab filed Critical Blueair Ab
Publication of WO2020245047A1 publication Critical patent/WO2020245047A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2017—Glass or glassy material the material being filamentary or fibrous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0038—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions with means for influencing the odor, e.g. deodorizing substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/58—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B01J20/28007—Sorbent size or size distribution, e.g. particle size with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • 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
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0258—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanoparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
    • B01D2239/0428—Rendering the filter material hydrophobic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/045—Deodorising additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0622—Melt-blown
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/065—More than one layer present in the filtering material
    • B01D2239/0681—The layers being joined by gluing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/25—Coated, impregnated or composite adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/30—Physical properties of adsorbents
    • B01D2253/302—Dimensions
    • B01D2253/304—Linear dimensions, e.g. particle shape, diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/40—Nitrogen compounds
    • B01D2257/406—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/10—Multiple layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81—Solid phase processes
    • B01D53/82—Solid phase processes with stationary reactants

Definitions

  • the present invention relates to improvements in filter technology for air purifiers.
  • WO 2019/167584 discloses an air purification device equipped with a case in which an intake opening and an exhaust opening are provided, and an air filter which is disposed within the case and is formed by pleating a sheet filter material.
  • the air filter is provided with a substrate layer that supports the filter shape, and a fiber layer that is formed from fibers having a narrower diameter than the fibers forming the substrate layer and that traps particles in the air.
  • the substrate layer has higher air permeability than the fiber layer and includes an adsorbent containing an amine compound.
  • the fiber layer is disposed upstream of the substrate layer relative to the direction of air flow.
  • Air purifiers are highly specialised and have been developed to use less energy and yet be more efficacious at removing particles from the air stream than previously.
  • a significant aspect to their performance is the engineering of the fan, the filter and also the architecture of the device. Anything that affects the pressure gradient affects the efficiency of the device and so designers in the field of air purification typically eschew anything that might increase the pressure drop between the fan and air exiting the device.
  • One of the components that might do this is the particulate filter.
  • a filter for an air purifier comprising a first woven layer and a second melt blown layer, and wherein said first woven layer comprises a malodour counteracting component.
  • malodour counteracting components can have a significant and deleterious effect on the performance of air purifiers resulting in their using more energy, making more noise and being less effective.
  • the inventors have discovered that the malodour counteracting effects can be optimised by separating the malodour counteracting from the filtration. This is contrary to the perceived wisdom of using fewer obstructions to the air flow. Further, the materials used in the respective layers also have an impact on performance.
  • the first layer has an average air resistance less than 1.0 Pa. Air resistance is measured using an Automated Resistance Tester 8130A commercially available from TSI. The air velocity passing the filter media is 5,33cm/s for the particle size of 0.3 pm and gives pressure drop (Pa) and filtration efficiency (%).
  • the air resistance is measured in the absence of any added material, for example any malodour counteracting material, in order to properly define the substrate perse.
  • the filter is woven.
  • the first layer is made from polyethylene terephthalate or polypropylene and examples are commercially available from many sources.
  • the filter also comprises a second particulate filtration layer.
  • the second layer has an average air resistance of from 4 to 16 Pa, preferably from 8 to 12 Pa.
  • the malodour counteracting component is selected from colloidal dispersions of particles of silica having a particle size of from 3 nm to 100 nm, to which ions of one or more metals are adsorbed, selected from metals having atomic numbers 21-31 , 39-46, 48-50, 57-82, and 89-93 as described in WO 2017/216285 and aqueous silicate solutions containing ions of metal having an atomic number selected from atomic numbers 21-31 , 39-50, 57-82, and 89-93 as described in WO 2019/020576.
  • the first and second layers are in contact with one another. This enables a smoother air flow through the two layers and so a lower likelihood that the pressure is reduced as the air passes through the two filters.
  • the first and second layers are adhered to one another.
  • adhered is meant that an adhesive is added to one or both layers either at spots or uniformly.
  • the adhesive will be added in a manner such that the air resistance of the filter is not adversely affected.
  • the first and second layer are pleated.
  • the second layer comprises polyolefin or glass fibre.
  • the second layer is a particulate filter layer and captures particles that adhere to the fibres constituting the layer as the air flow passes through it.
  • the second layer comprises polyolefin, preferably polypropylene and is melt blown.
  • an air purifier comprising a filter according to the first aspect.
  • the air purifier will comprise means for displacing the air through the purifier from ambient and through a filter according to the first aspect. It is also realised that the air purifier is not necessarily manufactured and marketed with a filter in place and that such a filter will be replaceable by the user.
  • the filter will also preferably comprise an ioniser for ionising the air as it passes through the device and before the filter in the direction of the air flow through the device.
  • the ioniser ionises the air which makes it easier for the filter to attract the charged particles.
  • a method of removing malodorous components from ambient air by filtering said ambient air through a filter according to the first aspect.
  • said malodorous component is selected from acetic acid, ammonia, isovaleric acid and formaldehyde.
  • a filter cassette comprising a substantially rigid case and a particulate filter as described above contained therein.
  • Figure 1 is a cross sectional view along a particulate filter consisting of a pair of layers, one of which contains a malodour counteracting constituent
  • Figure 2 is another cross section across a particulate filter comprising a pair of folded layers, one of which comprises a malodour counteracting constituent
  • Figure 3 is a particulate filter comprising a cassette and a particulate filter medium.
  • Figure 1 shows a first layer (1) which has a low air resistance and a second layer (2) which has a malodour component entrained within the layer.
  • the second layer has been soaked in a solution of malodour counteracting material such as is commercially available from Prebona.
  • Figure 2 shows a similar pair of layers this time formed into a folded configuration. The two layers are adhered to one another.
  • Figure 3 shows a particulate filter comprising a casing (4) and particulate filter (3) which has a layer with low air resistance and a malodour counteracting material.
  • table 1 is shown a series of air resistance measurements versus air flow speed. The purpose is to illustrate the effect of applying a malodour containing component to the various filter media.
  • the air resistance of the particulate filter is dramatically increased as the OdorControl is applied whereas the air resistance of the new low air resistance filter is not affected at all.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Nanotechnology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Filtering Materials (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

L'invention concerne un filtre pour un purificateur d'air comprenant une première couche tissée et une seconde couche soufflée à l'état fondu, ladite première couche tissée comprenant un composant de neutralisation des mauvaises odeurs et un purificateur d'air comprenant un tel filtre, ledit purificateur d'air comprenant un boîtier pour un moteur, un moyen de déplacement d'air et ledit filtre qui est amovible, de sorte qu'il puisse être remplacé depuis ledit purificateur lorsqu'il n'est plus fonctionnel de façon appropriée.
PCT/EP2020/065016 2019-06-04 2020-05-29 Filtre pour purificateur d'air comprenant un composant de neutralisation des mauvaises odeurs WO2020245047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19178238.2 2019-06-04
EP19178238 2019-06-04

Publications (1)

Publication Number Publication Date
WO2020245047A1 true WO2020245047A1 (fr) 2020-12-10

Family

ID=66770246

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/065016 WO2020245047A1 (fr) 2019-06-04 2020-05-29 Filtre pour purificateur d'air comprenant un composant de neutralisation des mauvaises odeurs

Country Status (1)

Country Link
WO (1) WO2020245047A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030207635A1 (en) * 1998-05-08 2003-11-06 Shinichi Minemura Gas adsorption sheet and air-purifying filter
US20050084632A1 (en) * 2003-10-16 2005-04-21 Urlaub John J. High surface area material blends for odor reduction, articles utilizing such blends and methods of using same
US20100212506A1 (en) * 2007-09-28 2010-08-26 Ryoichi Togashi Filter element and filter unit
WO2017216285A1 (fr) 2016-06-15 2017-12-21 Prebona Ab Sols composites
WO2019020576A1 (fr) 2017-07-24 2019-01-31 Prebona Ab Formulations contenant du métal
WO2019167584A1 (fr) 2018-02-27 2019-09-06 パナソニックＩｐマネジメント株式会社 Dispositif de purification d'air

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030207635A1 (en) * 1998-05-08 2003-11-06 Shinichi Minemura Gas adsorption sheet and air-purifying filter
US20050084632A1 (en) * 2003-10-16 2005-04-21 Urlaub John J. High surface area material blends for odor reduction, articles utilizing such blends and methods of using same
US20100212506A1 (en) * 2007-09-28 2010-08-26 Ryoichi Togashi Filter element and filter unit
WO2017216285A1 (fr) 2016-06-15 2017-12-21 Prebona Ab Sols composites
WO2019020576A1 (fr) 2017-07-24 2019-01-31 Prebona Ab Formulations contenant du métal
WO2019167584A1 (fr) 2018-02-27 2019-09-06 パナソニックＩｐマネジメント株式会社 Dispositif de purification d'air

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