WO2016043049A1 - 活性炭を含む吸着剤の製造方法 - Google Patents
活性炭を含む吸着剤の製造方法 Download PDFInfo
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- WO2016043049A1 WO2016043049A1 PCT/JP2015/074910 JP2015074910W WO2016043049A1 WO 2016043049 A1 WO2016043049 A1 WO 2016043049A1 JP 2015074910 W JP2015074910 W JP 2015074910W WO 2016043049 A1 WO2016043049 A1 WO 2016043049A1
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- 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
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- 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
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- 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
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- 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
- B01J20/28014—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 form
- B01J20/28042—Shaped bodies; Monolithic structures
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- 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
- B01J20/3007—Moulding, shaping or extruding
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- 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
- B01J20/3028—Granulating, agglomerating or aggregating
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- 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
- B01J20/3042—Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/14—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles in several steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/33—Preparation characterised by the starting materials from distillation residues of coal or petroleum; from petroleum acid sludge
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/384—Granulation
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- 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
- B01D2253/102—Carbon
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- 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
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- 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
- B01D2257/702—Hydrocarbons
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- 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
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- 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
- B01D2259/4516—Gas separation or purification devices adapted for specific applications for fuel vapour recovery systems
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- 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
- B01D2259/4541—Gas separation or purification devices adapted for specific applications for portable use, e.g. gas masks
Definitions
- the present invention relates to a method for producing an adsorbent containing activated carbon, and more particularly to a method for producing an adsorbent containing activated carbon having high adsorption performance and high size uniformity.
- Activated carbon has an excellent ability to adsorb various harmful substances and malodorous substances, and has been conventionally used as an adsorbent in many fields regardless of household use or industrial use (Patent Documents 1 and 2).
- Patent Documents 1 and 2 the adsorbent containing activated carbon has been used in, for example, deodorizers, air purifiers, water purifiers, and the like, and its applications are expanding.
- the adsorbent containing such activated carbon exhibits high adsorption performance
- the adsorbent size is often non-uniform. For this reason, when such an adsorbent having low uniformity in size is used for a gas mask, for example, there is a problem that sufficient ventilation performance cannot be obtained because of high ventilation resistance.
- an object of the present invention is to provide a method for producing an adsorbent containing activated carbon having high adsorption performance and high size uniformity.
- the inventors of the present invention provide a method for producing an adsorbent containing activated carbon, which includes a molding process in which the adsorbent is molded in a plurality of stages, and the final stage of the molding process is performed by a manufacturing method performed by tableting.
- the present inventors have found that the above problems can be solved and have completed the present invention. That is, the following preferred embodiments are included in the present invention.
- the production method according to [1] wherein the molding step is performed by wet molding.
- the adsorbent has a standard deviation of 0.02 for the minor axis that is the shortest adsorbent length and the longest axis that is the longest adsorbent length orthogonal to the depth direction of the die in tableting molding.
- Each molding other than the molding in the final stage is one or more moldings selected from the group consisting of tableting molding, hydraulic extrusion molding, pellet mill molding, rolling granulation molding and molding by a granulator, The production method according to any one of [1] to [4].
- the adsorbent contains, as a raw material thereof, one or more binders selected from the group consisting of carboxymethylcellulose, methylcellulose, polyvinyl alcohol, clay minerals, bentonite, modified acrylate copolymers and phenolic resins.
- adsorbent is an adsorbent used for a gas mask, a solvent recovery device, a deodorizer, or an automobile fuel transpiration prevention device.
- a spherical shape Selected from the group consisting of a spherical shape, a cubic shape, a rectangular parallelepiped shape, a cylindrical shape, a conical shape, a truncated cone shape, a polyhedral shape, a polygonal pyramid shape, a truncated pyramid shape, a donut shape, a cylindrical shape, a hollow shape, and a honeycomb shape.
- An adsorbent having at least one shape and a standard deviation of grain length of 0.03 to 0.2. [10] The standard deviation of the short axis that is the length of the shortest adsorbent and the long axis that is the length of the longest adsorbent orthogonal to the grain length is 0.02 to 0.1, [9] Adsorbent according to. [11] A gas mask containing the adsorbent according to [9] or [10]. [12] A solvent recovery apparatus containing the adsorbent according to [9] or [10]. [13] A deodorizer comprising the adsorbent according to [9] or [10]. [14] An automobile fuel transpiration prevention device comprising the adsorbent according to [9] or [10].
- the adsorbent containing activated carbon according to the present invention has excellent adsorption performance, and at the same time has high uniformity in size, and therefore can reduce ventilation resistance. Can be improved.
- the method for producing an adsorbent containing activated carbon of the present invention includes a molding step of molding the adsorbent over a plurality of stages, and the final stage of the molding process is performed by tableting.
- the molding in each stage is not particularly limited except the molding in the final stage, but from the viewpoint of improving the packing density and hardness of the adsorbent, tableting molding, hydraulic extrusion molding, pellet mill molding, rolling granulation It is preferably performed by molding and molding by a granulator, and more preferably by tableting molding, hydraulic extrusion molding, and pellet mill molding.
- Tableting molding can be performed using a conventionally known tableting molding machine, for example, a high-speed rotary tablet machine “Clean Press” manufactured by Kikusui Seisakusho Co., Ltd., a tableting machine “AP-” manufactured by Hata Iron Works, Ltd. Using SS, X-SS, HI-FXB, RIVA rotary tablet press “PICCOLA”, “MINIPRESS MII”, Mori Machinery's rotary press “XL400”, “PH300”, etc. It can be carried out. Tableting can usually be performed at a pressure of 0.2 to 10 kN and a filling depth of 5 to 30 mm. Although tableting is usually performed at room temperature, it may be performed under heating and cooling.
- the hydraulic extrusion molding can be performed using a conventionally known hydraulic extruder, for example, using 2FY100B140B30-AB manufactured by TAIYO.
- pellet mill molding a conventionally known pellet mill can be used.
- a 10HP pellet mill manufactured by Ueda Tekko Co., Ltd. can be used.
- Rolling granulation molding can be performed using a conventionally known rolling granulation apparatus, for example, using “Malmerizer” manufactured by Dalton Co., “High Speed Mixer” manufactured by Fukae Pautech.
- a conventionally known rolling granulator can be used.
- OG-1 type manufactured by Kikusui Seisakusho Co., Ltd. can be used.
- a dense one is suitable for tableting molding.
- high-density materials are suitable for tableting is that high-density molded products have good material filling properties into tableting molds, so stable tableting density and uniform size can be obtained. It is done.
- the above-described molding method before tableting includes tableting molding, hydraulic extrusion molding, or pellet mill molding that can obtain a molded product having a high density.
- the activated carbon in the present invention is activated carbon mainly made of a non-melting solid carbonaceous material.
- non-melting means that the raw material itself does not melt and become a liquid under conditions until the raw material is granulated and infusible.
- the carbonaceous material as the raw material of the present invention has a melting point or decomposition point of 300 ° C. or higher.
- the “carbonaceous material” means that the main component is made of carbon, and usually means that 60% or more of the total weight after drying and removing water is carbon atoms.
- “to use as a main raw material” means that 50% by weight or more, preferably 70% by weight or more of the amount of carbon before infusibilization or carbonization is derived from the solid carbonaceous material.
- the non-melting solid carbonaceous material used as the raw material for the activated carbon in the present invention is not particularly limited, for example, coconut shell, palm palm, fruit seed, sawdust, eucalyptus, pine and other wood, various plant-based raw materials, bamboo charcoal, various Various materials such as coal, such as anthracite, bituminous coal, or synthetic resin such as phenol resin, can be mentioned, but since it is easy to obtain and can produce activated carbon having various characteristics, coconut shell, coal, wood or synthetic Resins are preferred. Among them, coconut shells, coal, and wood are particularly preferable because they do not contain harmful impurities, are easily commercially available, and easily produce activated carbon having an appropriate pore structure.
- Activated carbon can be produced by carbonizing and activating a carbonaceous material.
- the conditions for carbonization are not particularly limited.
- a granular carbonaceous material it is possible to employ conditions such as processing at a temperature of 300 ° C. or higher while flowing a small amount of inert gas through a batch rotary kiln.
- Activated carbon can be obtained by carbonizing the carbonaceous material and then activating the carbonized carbonaceous material, but any method such as gas activation or chemical activation may be used as the activation method.
- a gas activation method is preferable.
- the gas used in the gas activation method include water vapor, carbon dioxide gas, oxygen, LPG combustion exhaust gas, or a mixed gas thereof.
- a steam-containing gas containing 10 to 50% by volume of steam is preferable.
- the activation temperature is usually 700 ° C. to 1100 ° C., preferably 800 ° C. to 1000 ° C.
- the activation time and the temperature raising rate are not particularly limited, and vary depending on the type, shape, size, desired pore size distribution, etc. of the carbonaceous material to be selected.
- Activated carbon obtained by activation may be used as it is, but it is preferable to use it after removing adhering components by acid washing, water washing or the like.
- the activated carbon thus obtained has a particle shape, a sheet shape or the like depending on the shape of the carbonaceous material, and is used after being pulverized.
- D50 is preferably 100 ⁇ m or less, and more preferably 50 ⁇ m or less.
- the pulverization means is not particularly limited, and known pulverization means such as a ball mill, various crushers, and a roll mill can be used.
- D50 is a particle diameter when the number or mass larger than a certain particle diameter occupies 50% of all the particles in the particle diameter distribution.
- the specific surface area of the activated carbon is preferably 500 m 2 / g or more, more preferably about 700 to 2000 m 2 / g. If the specific surface area of the activated carbon is smaller than the above range, the original organic compound adsorption removal function of the activated carbon may not function sufficiently.
- the activated carbon to be used may be subjected to post-treatment such as heat treatment, chemical modification of the surface, or physical loading of a functional substance on the surface, depending on the application.
- post-treatment such as heat treatment, chemical modification of the surface, or physical loading of a functional substance on the surface, depending on the application.
- surface modification include addition of a metal salt such as silver or iron, an oxide, or a mineral acid.
- the raw material of the adsorbent in the present invention may contain a binder in order to improve the binding property of the adsorbent and improve the moldability of the molded body.
- the binder is not particularly limited, and examples thereof include water-soluble polymer compounds, thermoplastic organic binders and composite oxides.
- polyvinyl alcohol hereinafter sometimes abbreviated as PVA
- MC methylcellulose
- CMC carboxymethylcellulose
- the water-soluble polymer compound is preferably one that dissolves easily in water. Moreover, since the handling difficulty increases when the degree of polymerization is very high, the viscosity (20 ° C.) of a 1% aqueous solution is preferably 200 mPa ⁇ sec or less, and more preferably 100 mPa ⁇ sec or less.
- water-soluble polymer compounds examples include polyvinyl alcohol (PVA) “Kuraray Poval TM PVA-205”, “Kuraray Poval TM PVA-105” manufactured by Kuraray Co., Ltd., methylcellulose (MC) “manufactured by Shin-Etsu Chemical Co., Ltd.” Metroise TM 60SH-4000 ”, Daiichi Kogyo Seiyaku Co., Ltd. Carboxymethylcellulose (CMC)“ Serogen TM WS-A ”, Daicel Corp. Carboxymethylcellulose (CMC)“ CMC Daicel TM 1105 ”,“ CMC Daicel TM 1205 ” Or the like.
- PVA polyvinyl alcohol
- MC methylcellulose
- the water-soluble polymer compound is usually a solid and may be mixed with activated carbon or the like as it is, but an aqueous solution having an appropriate concentration may be prepared in advance and this aqueous solution may be mixed with activated carbon or the like.
- the compounding amount of the water-soluble polymer compound can greatly affect the moldability. If the amount is too small, it will be difficult to maintain the shape of the molded body, and if it is too large, it will be difficult to move the raw material mixture during molding.
- the appropriate amount depends on the activated carbon, the type of molding, and the like, but is preferably 1 to 30 parts by mass, more preferably 3 to 15 parts by mass with respect to 100 parts by mass of the activated carbon.
- the thermoplastic organic binder is not particularly limited as long as it is a hot-melt polymer compound, but it must be non-toxic when used in water treatment applications, and is chemically stable. Those having a certain degree of strength are desirable.
- a polymer compound include resins such as polyolefins such as polyethylene and polypropylene, modified acrylate copolymers such as polymethyl methacrylate, polyamides such as 6,6-nylon, and the like.
- a polymer and a phenol resin are preferably used.
- the particle diameter of the thermoplastic organic binder is appropriately determined from the viewpoint of operability and the like, but preferably 5 to 100 ⁇ m, more preferably 10 to 30 ⁇ m.
- thermoplastic organic binder for example, trade name “Nicazole” manufactured by Nippon Carbide Industries Co., Ltd., trade name “Nipol” manufactured by Nippon Zeon Co., Ltd., powder polyethylene manufactured by Asahi Kasei Co., Ltd., product
- the names "Sunfine UH-900", “Sunfine UH-950", “Suntech-PAK”, etc. can be used.
- the blending amount of the thermoplastic organic binder may be appropriately determined according to the particle size of the activated carbon, but is preferably 10 to 150 parts by mass, more preferably 25 to 60 parts by mass with respect to 100 parts by mass of the activated carbon. Is done.
- the composite oxide is not particularly limited, and examples thereof include silica alumina, zeolite, activated clay, bentonite, clay mineral, and alumina sol.
- the compounding amount of the composite oxide may be in a range that does not impair the function of the activated carbon, and is preferably 30 to 150 parts by mass, more preferably 40 to 110 parts by mass with respect to 100 parts by mass of the activated carbon.
- Such composite oxides include the product names “Hotaka”, “New Hotaka”, “Asama”, “Fuji”, “Super Clay”, “Yakusagi Section”, “Akagi”, “ Myogi "and the like.
- the adsorbent raw material in the present invention may contain an additive.
- the additive include a lubricant and an excipient.
- lubricants include metal soap lubricants such as calcium stearate, barium stearate, zinc stearate, aluminum stearate, magnesium stearate, and composites thereof, and aliphatic carbonization such as liquid paraffin, polyolefin wax, and natural fats and oils.
- Hydrogen-based lubricants, fatty acid amide-based lubricants, fatty acid ester-based lubricants, fluoroplastic powders such as polytetrafluoroethylene, and the like can be used.
- the blending amount of the lubricant is preferably 1 to 5 parts by mass with respect to 100 parts by mass of the activated carbon.
- excipients examples include known excipients such as lactose, sucrose, mannitol, sorbitol, hydroxypropyl starch, starch, and calcium hydrogen phosphate.
- the blending amount of the excipient is preferably 1 to 5 parts by mass with respect to 100 parts by mass of the activated carbon.
- additional additives such as inorganic compounds having a particularly effective adsorption effect for a specific target substance are added to the raw material of the adsorbent as necessary, and activated carbon
- additional additives include inorganic particles such as zeolite, silica alumina and titanosilicate.
- the adsorbent raw material contains water
- the adsorbent molding step is performed by wet molding.
- water is contained in the raw material of the adsorbent, appropriate fluidity can be imparted to the mixed raw material, the filling into the molding machine becomes smooth, and the raw material can be filled into the molding machine without any defects.
- the amount of water blended varies depending on the amount and type of activated carbon and binder, the type of molding machine, etc., but is preferably 90 to 220 parts by mass, more preferably 120 to 180 parts by mass with respect to 100 parts by mass of activated carbon. This is desirable in terms of the effects in the present invention.
- a part or all of water can be used to dissolve the water-soluble polymer compound in advance.
- the shape of the molded body molded by each molding stage before tableting molding in the final stage is not particularly limited.
- the shape and size of the molded body molded by each molding stage before tableting molding in the final stage can be determined according to the size and shape of the target adsorbent, improving the size uniformity of the adsorbent From the viewpoint of improving the packing density and hardness, those smaller than the volume of the molded body obtained in the final stage are preferable, and those having a volume of about 1/3 or less of the molded body obtained in the final stage are more preferable.
- the molded product obtained by molding immediately before tableting molding in the final stage preferably has a crushing strength of 0.5 kgf or more, more preferably 0.7 kgf or more, and even more preferably 1.0 kgf or more, and usually 1.5 kgf. It has the following crushing strength.
- it preferably has a crushing strength of 0.5 kgf or more, more preferably 0.7 kgf or more, and even more preferably 1.0 kgf or more, and usually has a crushing strength of 1.5 kgf or less.
- the particle size [minor axis and major axis] is usually 0.1 to 20 mm
- the grain length is usually 0.1 to 20 mm.
- the grain size [minor axis and major axis] is 0.8 mm, and the grain length is 4.0 mm. It is. It is desirable for the crushing strength of the molded body to be in the above-mentioned range because the packing density and hardness of the adsorbent obtained by tableting the molded body and then heating it are increased.
- the crushing strength can be measured using a commercially available mechanical strength measuring device capable of measuring compressive strength (for example, Autograph AG-5000B manufactured by Shimadzu Corporation). It is a measured value obtained by clamping with a jig and compressing from that state under the condition of a compression speed of 10 mm / min.
- a commercially available mechanical strength measuring device capable of measuring compressive strength for example, Autograph AG-5000B manufactured by Shimadzu Corporation. It is a measured value obtained by clamping with a jig and compressing from that state under the condition of a compression speed of 10 mm / min.
- the shape of the molded product obtained by tableting at the final stage is not particularly limited, and is spherical, cubic, rectangular parallelepiped, cylindrical, conical, truncated cone, polyhedral, polygonal pyramid, truncated pyramid, donut Examples of the shape include a tubular shape, a hollow shape, and a honeycomb shape.
- the adsorbent can be obtained by heating, sintering, fusing and solidifying the resulting molded body and cooling.
- the heating temperature may be equal to or higher than the melting point or softening point of the thermoplastic organic binder.
- the temperature is too high, the molded body is deformed by partial shrinkage. It may be difficult to obtain a desired shape.
- a water-soluble polymer compound is used, it is the same as the thermoplastic organic binder. If the temperature is too high, the molded body may be deformed by partial shrinkage, and it may be difficult to obtain a desired shape.
- An appropriate temperature range depends on the kind of the binder, but is preferably 115 ° C to 135 ° C, more preferably 115 ° C to 125 ° C.
- the heating temperature may be equal to or higher than the firing temperature, and although it depends on the type of the composite oxide, it is preferably 800 ° C. or higher, more preferably 900 ° C. or higher. Heating is performed under oxygen-free conditions, for example, in an inert gas atmosphere such as nitrogen or argon.
- the adsorbent of the present invention is a group consisting of a spherical shape, a cubic shape, a rectangular parallelepiped shape, a cylindrical shape, a conical shape, a truncated cone shape, a polyhedral shape, a polygonal pyramid shape, a truncated pyramid shape, a donut shape, a cylindrical shape, a hollow shape, and a honeycomb shape. At least one shape selected from.
- the adsorbent according to the present invention preferably has a benzene adsorption capacity of 20% by weight or more, more preferably 25% by weight or more, and still more preferably 40% by weight or more, from the viewpoint of good adsorption performance. It has a benzene adsorption capacity of not more than% by weight.
- the benzene adsorption capacity can be measured in accordance with the adsorption performance measurement of JIS K1474 solvent vapor, and can be expressed as an equilibrium adsorption capacity at a concentration of 1/10 of the saturated concentration.
- the standard deviation of the adsorbent grain length is preferably 0.2 or less, more preferably 0.15 or less, even more preferably 0.1 or less, and usually 0.03 or more.
- the standard deviation of the particle length of the adsorbent according to the present invention is preferably 0.03 to 0.2, more preferably 0.03 to 0.15, and even more preferably 0.03 to 0.1.
- the standard deviation of each of the minor axis and the major axis of the adsorbent according to the present invention is preferably 0.1 or less, more preferably 0.08 or less, still more preferably 0.06 or less, and usually 0.02 That's it.
- the standard deviation of the minor axis and the major axis of the adsorbent according to the present invention is preferably 0.02 to 0.1, more preferably 0.02 to 0.08, and even more preferably 0.02 to 0.06. is there.
- the adsorbent size is highly uniform, and the airflow resistance when the adsorbent is filled becomes low.
- the particle length of the adsorbent is the length of the adsorbent in the depth direction of the die in tableting molding.
- the minor axis and major axis of the adsorbent are respectively the shortest adsorbent length and the longest adsorbent length orthogonal to the depth direction (grain length) of the mortar in tableting.
- the minor axis and major axis of the adsorbent are the minor axis and major axis of the adsorbent that are orthogonal to each other on the elliptical plane that is orthogonal to the depth direction of the die in tableting molding.
- the short diameter and long diameter of the adsorbent are the same, and are the diameter (particle diameter) of the bottom surface.
- the short diameter and long diameter of the adsorbent are the shorter diameter and the longer diameter, respectively, of the two bottom surface diameters.
- the short diameter, long diameter and grain length of the adsorbent can be measured by measuring 30 or more randomly selected adsorbent particles using a digital caliper and calculating the average value of the measured values.
- the standard deviation is calculated with respect to 30 or more adsorbent particles randomly selected, like the short axis of the adsorbent.
- the adsorbent according to the present invention is preferably 20.0 Pa / cm or less, more preferably 19.0 Pa / cm or less, and even more in a cylindrical shape having a particle size (short diameter and long diameter) of 5 mm and a particle length of 5 mm, for example.
- it has a ventilation resistance of 18.5 Pa / cm or less, and usually has a ventilation resistance of 15.5 Pa / cm or more.
- the ventilation resistance of the adsorbent is within the above range, for example, when the adsorbent is used for a gas mask or the like, the ventilation performance is good.
- the ventilation resistance of the adsorbent can be measured by filling the adsorbent with a cylindrical column having a diameter of 39 mm so that the layer height is 100 mm and flowing dry air at a flow rate of 50 cm / s.
- the adsorbent according to the present invention preferably has a packing density of 0.30 g / mL or more, more preferably 0.35 g / mL or more, even more preferably 0.37 g / mL or more, and usually 0.70 g / mL. Has a packing density of less than or equal to mL. When the adsorbent packing density is in the above range, the adsorbent filling property is improved.
- the packing density of the adsorbent can be measured according to JIS K1474 or ASTM D2854.
- the adsorbent according to the present invention preferably has a JIS hardness of 80% or more, more preferably 85% or more, and even more preferably 90% or more, and usually has a JIS hardness of 99.9% or less. Furthermore, the adsorbent according to the present invention preferably has an MS hardness of 40% or more, more preferably 45% or more, and even more preferably 50% or more, and usually has an MS hardness of 98% or less. When the MS hardness and JIS hardness of the adsorbent are in the above ranges, the adsorbent has good durability.
- JIS hardness can be measured by the method prescribed
- MS hardness micro strength hardness
- a sample and a steel ball are placed in two stainless tubes, and the hardness is examined by performing a predetermined rotation at a constant rotation speed.
- Is a measurement method generally used in In the present invention in order to increase the measurement accuracy of the granulated coal, the sample 2g is set to 5g, the rotation speed of the iron container is set to 800 rotations, and 1000 steel balls are set to 10 pieces.
- the adsorbent according to the present invention is preferably 0.5 kgf or more, more preferably 0.6 kgf or more, and even more preferably 0.7 kgf in a cylindrical shape having a particle size (short diameter and long diameter) of 5 mm and a particle length of 5 mm. It has the above crushing strength and usually has a crushing strength of 3.3 kgf or less. When the crushing strength of the adsorbent is within the above range, the durability of the adsorbent becomes good.
- the adsorbent according to the present invention can be used for gas phase or liquid phase.
- the adsorbent according to the present invention is not particularly limited.
- the adsorbent is used as a gas mask, a solvent recovery device, a deodorant, an automobile fuel transpiration prevention device, or the like.
- the gas mask, the solvent recovery device, the deodorizing agent, and the automobile fuel transpiration prevention device including the adsorbent according to the present invention exhibit high adsorption performance and at the same time have very high ventilation performance.
- Examples 1 to 9 and Comparative Examples 1 to 12 the following were used as molding machines in each molding method.
- -Tableting molding machine AQU3-A manufactured by Kikusui Seisakusho Co., Ltd. was used at a material filling depth of 13 mm, a rotating disk rotation speed of 25 rpm, and a molding pressure of 3 kN.
- -Hydraulic Extruder Tableting molding was performed using 2FY100B140B300-AB manufactured by TAIYO.
- -Pellet mill Pellet mill molding was performed using a 10HP pellet mill manufactured by Ueda Iron Works.
- -Rolling granulator It performed using Spartan Luther RMO-4H made from Dalton Co., Ltd.
- GW-H specific surface area 130 m 2 / g
- D50 100 ⁇ m or less
- Examples 1 to 9 and Comparative Examples 1 to 12 in Table 1 are as follows. Bentonite, Inc. Hojun made "Hotaka TM” ⁇ Clay mineral Kyoritsu Material Co., Ltd. “Yakusagi Section” ⁇ Carboxymethylcellulose Daiichi Kogyo Seiyaku Co., Ltd. “Serogen TM WS-A” ⁇ Methylcellulose "Metrozu TM 60SH-4000” manufactured by Shin-Etsu Chemical Co., Ltd.
- Example 1 2 kg of activated carbon, 0.22 kg of carboxymethylcellulose, 1.5 kg of bentonite and 2.68 kg of water were put into a Dalton universal stirrer Henschel mixer and uniformly stirred and mixed. This mixture was molded by a pellet mill in the first molding stage to obtain a cylindrical molded body (particle diameter [minor axis and major axis] 0.8 mm, grain length 4 mm). Here, the crushing strength of the obtained molded body was measured.
- the obtained molded body is molded at room temperature under the operating conditions of a molding pressure of 3 kN, a material filling depth of 13 mm, a cylindrical shape, and a rotating disk rotation speed of 25 rpm by tableting molding in the final stage, and finally the circular shape A columnar molded body (particle diameter [minor axis and major axis] 5 mm, grain length 5 mm) was obtained. Thereafter, the molded body was heated for 1 hour in a nitrogen atmosphere at 900 ° C. using a baking furnace to obtain an adsorbent.
- Example 2 According to the formulation shown in Table 1, each component was mixed in the same manner as in Example 1. This mixture was molded by a pellet mill in the first molding stage to obtain a cylindrical molded body (particle diameter [minor axis and major axis] 0.8 mm, grain length 3 mm). Next, the obtained molded body was molded by a granulator in the second molding stage to obtain a cylindrical molded body (particle diameter [short diameter and long diameter] 0.8 mm, grain length 1 mm). Here, the crushing strength of the obtained molded body was measured. Thereafter, in the final stage molding, tableting was performed in the same manner as in Example 1 to obtain a cylindrical molded body (particle diameter [short diameter and long diameter] 5 mm, grain length 5 mm). Thereafter, the molded body was heated for 1 hour in a nitrogen atmosphere at 900 ° C. using a baking furnace to obtain an adsorbent.
- each component was mixed in the same manner as in Example 1, and by the molding method shown in Table 1, as in Example 1 or 2, a cylindrical molded body (particle diameter [minor axis and major axis ] 5 mm, grain length 5 mm). Moreover, the crushing strength of the molded body obtained by molding immediately before tableting molding in the final stage was measured. Thereafter, the molded body was heated for 1 hour at 900 ° C. in a nitrogen atmosphere to obtain an adsorbent.
- Comparative Example 1 According to the formulation shown in Table 1, each component was mixed in the same manner as in Example 1. This mixture was molded by a hydraulic extruder to obtain a cylindrical molded body (particle diameter [minor axis and major axis] 5 mm, grain length 5 mm). Thereafter, the molded body was heated for 1 hour in a nitrogen atmosphere at 900 ° C. using a dryer to obtain an adsorbent.
- Comparative Examples 2-12 In accordance with the formulation shown in Table 1, each component was mixed in the same manner as in Example 1, and by the molding method shown in Table 1, as in Example 1 or Comparative Example 1, a cylindrical molded body (particle diameter [short diameter And a major axis] of 5 mm and a grain length of 5 mm. Moreover, the crushing strength of the molded body obtained by molding immediately before tableting molding in the final stage was measured. Thereafter, the molded body was heated for 1 hour at 900 ° C. in a nitrogen atmosphere to obtain an adsorbent.
- the packing density, JIS hardness, and benzene adsorption capacity were measured according to JIS K1474. Moreover, MS hardness, crushing strength, ventilation resistance, particle size, and grain length were measured by the methods described above.
- the adsorbents according to the present invention obtained in Examples 1 to 9 have high adsorption performance, and at the same time, the standard deviation of the particle size and particle length is a very low value. It turns out that it has the uniformity of. Furthermore, when the crushing strength of the molded product obtained by molding immediately before tableting molding in the final stage was high, an adsorbent excellent in filling density and hardness, and crushing strength was obtained. On the other hand, in Comparative Examples 1 to 12, the standard deviation of the particle size and particle length of the adsorbent is low and the size is not uniform as compared with the adsorbent according to the present invention, thereby achieving the object of the present invention. I could't.
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Abstract
Description
すなわち、本発明には、以下の好適な実施態様が含まれる。
〔1〕活性炭を含む吸着剤の製造方法であって、吸着剤を複数段階に亘って成型する成型工程を含み、該成型工程における最終段階の成型は打錠成型によって行われる製造方法。
〔2〕成型工程を湿式成型によって行う、前記〔1〕に記載の製造方法。
〔3〕吸着剤は、打錠成型における臼の深さ方向の吸着剤の長さである粒長の標準偏差が0.03~0.2である、前記〔1〕または〔2〕に記載の製造方法。
〔4〕吸着剤は、打錠成型における臼の深さ方向に直交する、最も短い吸着剤の長さである短径および最も長い吸着剤の長さである長径それぞれの標準偏差が0.02~0.1である、前記〔1〕~〔3〕のいずれかに記載の製造方法。
〔5〕最終段階における成型以外の各成型が、打錠成型、油圧押出成型、ペレットミル成型、転動造粒成型および整粒機による成型からなる群から選択される1以上の成型である、前記〔1〕~〔4〕のいずれかに記載の製造方法。
〔6〕活性炭は、ヤシ殻、石炭、木質および合成樹脂からなる群から選択される1以上の原料から製造される、前記〔1〕~〔5〕のいずれかに記載の製造方法。
〔7〕吸着剤は、その原料としてカルボキシルメチルセルロース、メチルセルロース、ポリビニルアルコール、粘土鉱物、ベントナイト、変性アクリル酸エステル共重合体およびフェノール樹脂からなる群から選択される1以上のバインダーを含む、前記〔1〕~〔6〕のいずれかに記載の製造方法。
〔8〕吸着剤は、ガスマスク、溶剤回収装置、脱臭剤または自動車燃料蒸散防止装置に用いる吸着剤である、前記〔1〕~〔7〕のいずれかに記載の製造方法。
〔9〕球状、立方体状、直方体状、円柱状、円錐状、円錐台状、多面体状、多角錐状、角錐台状、ドーナツ状、筒状、中空状およびハニカム状からなる群から選択される少なくとも1つの形状を有し、粒長の標準偏差が0.03~0.2である、吸着剤。
〔10〕粒長に直交する、最も短い吸着剤の長さである短径および最も長い吸着剤の長さである長径それぞれの標準偏差が0.02~0.1である、前記〔9〕に記載の吸着剤。
〔11〕前記〔9〕または〔10〕に記載の吸着剤を含むガスマスク。
〔12〕前記〔9〕または〔10〕に記載の吸着剤を含む溶剤回収装置。
〔13〕前記〔9〕または〔10〕に記載の吸着剤を含む脱臭剤。
〔14〕前記〔9〕または〔10〕に記載の吸着剤を含む自動車燃料蒸散防止装置。
本発明の活性炭を含む吸着剤の製造方法は、吸着剤を複数段階に亘って成型する成型工程を含み、成型工程における最終段階の成型は打錠成型によって行われる。
・打錠成型機
株式会社菊水製作所製AQU3-Aを用いて、材料充填深さ13mm、回転盤回転数25rpm、成型圧3kNで行った。
・油圧押出機
TAIYO社製2FY100B140B300-ABを用いて、打錠成型を行った。
・ペレットミル
上田鉄工社製 10HPペレットミルを用いてペレットミル成型を行った。
・転動造粒装置
株式会社ダルトン製のスパルタン・リューザーRMO-4Hを用いて行った。
・整粒機
株式会社菊水製作所製OG-1を用いて、目開き1mmの網を設置し整粒を行った。
無煙炭を原料とする石炭系活性炭(比表面積1650m2/g)をボールミルにて粉砕し、本発明においてはこれを、石炭を原料とする活性炭とした。(株)島津製作所製の回折式粒度分布計で粉砕物の粒子径を測定したところ、D50=32μmであった。
・ベントナイト
株式会社ホージュン製「穂高TM」
・粘土鉱物
共立マテリアル株式会社製「八草木節」
・カルボキシルメチルセルロース
第一工業製薬株式会社製「セロゲンTMWS-A」
・メチルセルロース
信越化学工業株式会社製「メトローズTM60SH-4000」
活性炭2kg、カルボキシルメチルセルロース0.22kg、ベントナイト1.5kgおよび水2.68kgをダルトン製万能攪拌機ヘンシェルミキサーに投入して均一に攪拌、混合した。この混合物を第1成型段階においてペレットミルによって成型し、円柱状の成型体(粒径[短径および長径]0.8mm、粒長4mm)を得た。ここで、得られた成型体の圧壊強度を測定した。次に、得られた成型体を、最終段階における打錠成型によって、成型圧3kN、材料充填深さ13mm、円柱状、回転盤回転数25rpmの運転条件で室温にて成型し、最終的に円柱状の成型体(粒径[短径および長径]5mm、粒長5mm)を得た。その後、焼成炉を用いて900℃、窒素雰囲気下において、1時間にわたって成型体を加熱し、吸着剤を得た。
表1に示す配合に従って、実施例1と同様に各成分をそれぞれ混合した。この混合物を第1成型段階においてペレットミルによって成型し、円柱状の成型体(粒径[短径および長径]0.8mm、粒長3mm)を得た。次に、得られた成型体を第2成型段階において整粒機によって成型し、円柱状の成型体(粒径[短径および長径]0.8mm、粒長1mm)を得た。ここで、得られた成型体の圧壊強度を測定した。その後、最終段階の成型において、実施例1と同様に打錠成型を行い、円柱状の成型体(粒径[短径および長径]5mm、粒長5mm)を得た。その後、焼成炉を用いて900℃、窒素雰囲気下において、1時間にわたって成型体を加熱し、吸着剤を得た。
表1に示す配合に従って、実施例1と同様に各成分をそれぞれ混合し、表1に示す成型方法によって、実施例1または2と同様に、円柱状の成型体(粒径[短径および長径]5mm、粒長5mm)を得た。また、最終段階における打錠成型直前の成型によって得られる成型体の圧壊強度を測定した。その後、900℃、窒素雰囲気下において、1時間にわたって成型体を加熱し、吸着剤を得た。
表1に示す配合に従って、実施例1と同様に各成分をそれぞれ混合した。この混合物を油圧押出機によって成型し、円柱状の成型体(粒径[短径および長径]5mm、粒長5mm)を得た。その後、乾燥機を用いて900℃、窒素雰囲気下において、1時間にわたって成型体を加熱し、吸着剤を得た。
表1に示す配合に従って、実施例1と同様に各成分をそれぞれ混合し、表1に示す成型方法によって、実施例1または比較例1と同様に、円柱状の成型体(粒径[短径および長径]5mm、粒長5mm)を得た。また、最終段階における打錠成型直前の成型によって得られる成型体の圧壊強度を測定した。その後、900℃、窒素雰囲気下において、1時間にわたって成型体を加熱し、吸着剤を得た。
一方、比較例1~12においては、本発明による吸着剤と比較して、吸着剤の粒径および粒長の標準偏差が低く、そのサイズが不均一であり、本発明の課題を達成することはできなかった。
Claims (14)
- 活性炭を含む吸着剤の製造方法であって、吸着剤を複数段階に亘って成型する成型工程を含み、該成型工程における最終段階の成型は打錠成型によって行われる製造方法。
- 成型工程を湿式成型によって行う、請求項1に記載の製造方法。
- 吸着剤は、打錠成型における臼の深さ方向の吸着剤の長さである粒長の標準偏差が0.03~0.2である、請求項1または2に記載の製造方法。
- 吸着剤は、打錠成型における臼の深さ方向に直交する、最も短い吸着剤の長さである短径および最も長い吸着剤の長さである長径それぞれの標準偏差が0.02~0.1である、請求項1~3のいずれかに記載の製造方法。
- 最終段階における成型以外の各成型が、打錠成型、油圧押出成型、ペレットミル成型、転動造粒成型および整粒機による成型からなる群から選択される1以上の成型である、請求項1~4のいずれかに記載の製造方法。
- 活性炭は、ヤシ殻、石炭、木質および合成樹脂からなる群から選択される1以上の原料から製造される、請求項1~5のいずれかに記載の製造方法。
- 吸着剤は、その原料としてカルボキシルメチルセルロース、メチルセルロース、ポリビニルアルコール、粘土鉱物、ベントナイト、変性アクリル酸エステル共重合体およびフェノール樹脂からなる群から選択される1以上のバインダーを含む、請求項1~6のいずれかに記載の製造方法。
- 吸着剤は、ガスマスク、溶剤回収装置、脱臭剤または自動車燃料蒸散防止装置に用いる吸着剤である、請求項1~7のいずれかに記載の製造方法。
- 球状、立方体状、直方体状、円柱状、円錐状、円錐台状、多面体状、多角錐状、角錐台状、ドーナツ状、筒状、中空状およびハニカム状からなる群から選択される少なくとも1つの形状を有し、粒長の標準偏差が0.03~0.2である、吸着剤。
- 粒長に直交する、最も短い吸着剤の長さである短径および最も長い吸着剤の長さである長径それぞれの標準偏差が0.02~0.1である、請求項9に記載の吸着剤。
- 請求項9または10に記載の吸着剤を含むガスマスク。
- 請求項9または10に記載の吸着剤を含む溶剤回収装置。
- 請求項9または10に記載の吸着剤を含む脱臭剤。
- 請求項9または10に記載の吸着剤を含む自動車燃料蒸散防止装置。
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WO2020067007A1 (ja) * | 2018-09-28 | 2020-04-02 | 大阪ガスケミカル株式会社 | 吸着材、キャニスタ及び吸着材の製造方法 |
JP2020510527A (ja) * | 2017-12-12 | 2020-04-09 | 江▲蘇▼省▲農▼▲業▼科学院Jiangsu Academy Of Agricultural Sciences | 複合改質わら粒状活性炭吸着材料の製造方法及びリン吸着における使用 |
JP2021013879A (ja) * | 2019-07-10 | 2021-02-12 | 東洋紡株式会社 | 有機溶剤回収方法及び有機溶剤回収システム |
KR102663974B1 (ko) * | 2017-12-27 | 2024-05-14 | 주식회사 쿠라레 | 활성탄 성형체 |
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CN107934956A (zh) * | 2017-12-23 | 2018-04-20 | 淮北智淮科技有限公司 | 一种污水处理用活性炭及其制造方法 |
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US20230218692A1 (en) * | 2020-04-30 | 2023-07-13 | Purcann Pharma Inc. | Method for producing a purified cannabaceae biomass extract |
CN112408390B (zh) * | 2020-11-20 | 2022-10-18 | 西北化工研究院有限公司 | 一种煤油共炼残渣制备活性炭吸附剂的方法 |
WO2023089633A1 (en) * | 2021-11-16 | 2023-05-25 | Manish Jain | Activated carbon beads with reduced dust spillage |
CN115353105A (zh) * | 2022-09-02 | 2022-11-18 | 山西顺福祥环保科技有限责任公司 | 一种利用污泥、生物质、石油渣制备活性炭的方法及产品 |
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US20170274351A1 (en) | 2017-09-28 |
US20190118161A1 (en) | 2019-04-25 |
CN106794444A (zh) | 2017-05-31 |
JPWO2016043049A1 (ja) | 2017-08-17 |
JP6545693B2 (ja) | 2019-07-17 |
US10857515B2 (en) | 2020-12-08 |
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