WO2015190459A1 - Agent d'élimination de siloxane et filtre d'élimination de siloxane utilisant celui-ci - Google Patents

Agent d'élimination de siloxane et filtre d'élimination de siloxane utilisant celui-ci Download PDF

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Publication number
WO2015190459A1
WO2015190459A1 PCT/JP2015/066563 JP2015066563W WO2015190459A1 WO 2015190459 A1 WO2015190459 A1 WO 2015190459A1 JP 2015066563 W JP2015066563 W JP 2015066563W WO 2015190459 A1 WO2015190459 A1 WO 2015190459A1
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siloxane
activated carbon
measurement
hours
surface area
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PCT/JP2015/066563
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English (en)
Japanese (ja)
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増森　忠雄
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東洋紡株式会社
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Priority claimed from JP2014119453A external-priority patent/JP6500352B2/ja
Priority claimed from JP2014119454A external-priority patent/JP6500353B2/ja
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Publication of WO2015190459A1 publication Critical patent/WO2015190459A1/fr

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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
    • 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
    • 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

Definitions

  • the present invention relates to a siloxane remover excellent in siloxane gas removal performance and low desorption, and a siloxane removal filter using the remover. More specifically, a siloxane remover that can efficiently remove siloxane gases and has less problems that the removed siloxane gases are desorbed due to environmental changes such as concentration, temperature, and humidity, and the like are used.
  • the present invention relates to a siloxane removal filter.
  • the environmental changes such as concentration, temperature, and humidity are changes in the range of 0 to 10 vol% in concentration, ⁇ 30 to 300 ° C. in temperature, and 0 to 100 RH% in humidity.
  • the siloxane gas is a gaseous compound having a siloxane bond (Si—O bond), for example, a linear and cyclic gaseous compound having 1 to 40 siloxane bonds. More specifically, hexamethyldisiloxane (L2), octamethyltrisiloxane (L3), decamethyltetrasiloxane (L4), dodecamethylpentasiloxane (L5), hexamethylcyclotrisiloxane (D3), octamethylcyclo Examples include tetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), and the like. Moreover, the low desorption property said here refers to the ratio of adsorption capacity and desorption amount (adsorption capacity / desorption amount).
  • pollutants in the atmosphere there are a wide variety of types, and they are composed of polar gases such as hydrogen sulfide, ammonia, aldehyde, and acetic acid, and low polarity gases such as benzene, toluene, styrene, and siloxane gases.
  • polar gases such as hydrogen sulfide, ammonia, aldehyde, and acetic acid
  • low polarity gases such as benzene, toluene, styrene, and siloxane gases.
  • siloxane gases are known to cause various harmful effects.
  • particulate silicon oxide produced by combustion adheres to a gas turbine or a gas engine, causing a power generation failure, or forming a silica film on the surface of the gas sensor, causing a false alarm.
  • porous materials such as activated carbon, silica gel, zeolite, activated alumina and the like are often used for the purpose of removing siloxane gases.
  • activated carbon having at least one surface selected from the group consisting of iodine oxoacid, bromine oxoacid, iodine oxide, and bromine oxide
  • activated carbon carrying a resin having a sulfonic acid group for example, Patent Document 2
  • activated carbon impregnated with a sulfonic acid group-modified metal oxide sol are known (for example, Patent Documents 3 and 4).
  • activated carbon as a carrier.
  • activated carbon carrying ferrous sulfate and / or ferric sulfate is known as an adsorbent for siloxane compounds (for example, Patent Document 5).
  • an adsorbent for siloxane compounds for example, Patent Document 5
  • activated carbon as a carrier.
  • ferrous sulfate and / or ferric sulfate is supported on general activated carbon, there is a problem that low desorption is not sufficient.
  • the present situation is that there is no siloxane removal agent that can efficiently remove siloxane gases and has excellent low desorption and a siloxane removal filter using the siloxane removal agent.
  • the present invention has been made against the background of the above-described prior art, and can efficiently remove siloxane gases and has a low detachability and a siloxane removal using the siloxane remover.
  • the purpose is to provide a filter.
  • the present invention is as follows. 1.
  • a siloxane remover in which an active compound or metal salt is supported on activated carbon in an amount of 0.1 to 20% by weight, the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 40% is 25 ° C. and a relative humidity is 90%.
  • a siloxane removing agent wherein a water adsorption amount ratio divided by an amount of water adsorption at the time is 0.10 or more.
  • Siloxane remover. 4 A siloxane removal filter comprising the siloxane remover according to any one of 1 to 3 above.
  • the acid dissociation index (pKa) is calculated from the acid dissociation constant (Ka) according to the following formula.
  • the acid dissociation constant (Ka) refers to the acid dissociation constant (Ka) in water under normal temperature and normal pressure (25 ° C., 1 atm) conditions. If there are a plurality of acid dissociation indices (pKa), It refers to the smallest acid dissociation index (pKa).
  • pKa -log 10 Ka
  • the siloxane remover according to the present invention is a siloxane remover in which an active compound or metal salt is supported on activated carbon in an amount of 0.1 to 20% by weight, and the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 40%.
  • the water adsorption amount ratio obtained by dividing the amount by the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 90% is 0.10 or more.
  • the acidic compound has an acid dissociation index (pKa) of 2.2 or less, or the metal salt has a trivalent metal element having a third ionization energy of 30 to 35 eV, or has a fourth ionization energy of 30. Since it contains a tetravalent or higher-valent metal element of 55 eV, the siloxane gas can be efficiently removed, and there is an advantage of excellent low desorption.
  • the siloxane remover of the present invention 0.1 to 20% by weight of an acidic compound or metal salt is supported on activated carbon, and the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 40% is 25 ° C.
  • the water adsorption amount ratio divided by the water adsorption amount at a humidity of 90% is 0.10 or more.
  • Activated charcoal is loaded with 0.1 to 20% by weight of acidic compound or metal salt, and the amount of moisture adsorption when the siloxane remover is 25 ° C and 40% relative humidity is 25 ° C and 90% relative humidity.
  • the present inventor has found that when the water adsorption amount ratio divided by 0.10 is 0.10 or more, the siloxane gas can be efficiently removed, and furthermore, the low desorption property is excellent.
  • siloxane gases and water molecules are adsorbed on the activated carbon.
  • the adsorbed siloxane gas reacts with a nearby acidic compound or metal salt to activate the siloxane gas.
  • the activated state of the activated siloxane gas is maintained by water molecules present in the vicinity thereof.
  • the activated siloxane gases react with each other or the activated siloxane gases react with the newly activated siloxane gases adsorbed on the activated carbon, so that the siloxane gases have a higher molecular weight. Converted to siloxane compounds. Since siloxane compounds having a large molecular weight have a high boiling point, it is considered that low detachability is improved.
  • the acidic compound or metal salt supported on the activated carbon is less than 0.1% by weight, the progress of (2) is slowed down, so that the desorption of siloxane gases is sufficiently suppressed. It is not possible. Further, if the acidic compound or metal salt supported on the activated carbon is larger than 20% by weight, the pores of the activated carbon are blocked by the supported acidic compound or metal salt, and the progress of the above (1) is slowed down. It is not possible to remove the similar gases efficiently.
  • the water adsorption amount ratio obtained by dividing the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 40% by the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 90% is less than 0.10, Since 3) to (4) do not proceed, the desorption of the siloxane gas cannot be sufficiently suppressed.
  • the upper limit of the moisture adsorption amount ratio is not particularly limited, but is preferably 0.4 or less, and more preferably 0.35 or less. If it is larger than 0.4, the adsorption of siloxane is inhibited by water molecules, and the above (1) does not proceed.
  • the BET specific surface area of the siloxane remover in the present invention is not particularly limited, but is preferably 200 to 3000 m 2 / g. More preferably 600 ⁇ 1800m 2 / g, still more preferably 1000 ⁇ 1600m 2 / g. If the BET specific surface area is smaller than 200 m 2 / g, the contact area with the siloxane gas is small, so that it cannot be efficiently removed. If the BET specific surface area is larger than 3000 m 2 / g, it becomes difficult to produce activated carbon.
  • the pore volume of the siloxane remover in the present invention is not particularly limited, but is preferably 0.3 to 2.0 cc / g. It is more preferably 0.4 to 1.0 cc / g, and further preferably 0.5 to 1.0 cc / g. If the pore volume is smaller than 0.3 cc / g, the adsorption capacity of the siloxane gas becomes small and cannot be efficiently removed. If the pore volume is larger than 2.0 cc / g, production becomes extremely difficult.
  • the activated carbon in the present invention is not particularly limited, but is preferably obtained by hydrophilizing general activated carbon such as coconut shell activated carbon, coal activated carbon, wood activated carbon, synthetic resin activated carbon.
  • hydrophilizing activated carbon include a method in which activated carbon is brought into contact with an oxidizing liquid such as nitric acid, a sodium hypochlorite aqueous solution, and a hydrogen peroxide solution, and an oxidizing gas such as oxygen, ozone, and nitrogen oxide.
  • the method of making it contact is preferable.
  • a method of contacting with nitric acid or a sodium hypochlorite aqueous solution is more preferable.
  • the acid dissociation index (pKa) of the acidic compound in the present invention is preferably 2.2 or less. This is because if the acid dissociation index (pKa) is larger than 2.2, the reaction between the siloxane gas adsorbed on the activated carbon and the acidic compound becomes slow, and a sufficiently low desorption property cannot be obtained.
  • the lower limit of the acid dissociation index (pKa) is not particularly defined, but is preferably ⁇ 10 or more. If it is ⁇ 10 or less, the activated carbon may be dissolved.
  • the molecular weight of the acidic compound in the present invention is preferably 1000 or less. It is more preferably 500 or less, and further preferably 400 or less. This is because if the molecular weight is larger than 1000, the reaction between the siloxane gas adsorbed on the activated carbon and the acidic compound becomes slow, and a sufficiently low desorption property cannot be obtained.
  • inorganic acids More preferred are inorganic acids, sulfonic acids and mixtures containing these which are relatively easily available. Sulfuric acid, phosphoric acid, p-toluenesulfonic acid, benzenesulfonic acid, and mixtures containing these, which are available at low cost, are further preferred.
  • the type of acidic compound in the present invention is not particularly limited, but is preferably liquid or solid under normal temperature and normal pressure (25 ° C., 1 atm) conditions. This is because if it is a gas at room temperature and normal pressure, it becomes difficult to support the activated carbon.
  • the acidic compound in the present invention preferably has a solubility of 1 g or more. If the solubility is less than 1 g, it becomes difficult to support an acidic compound on the activated carbon surface, and the siloxane gas desorption cannot be sufficiently suppressed.
  • solubility here refers to the mass of the solute which melt
  • the method of supporting the acidic compound on the activated carbon in the present invention is not particularly limited, but the method of impregnating the aqueous solution of the acidic compound with activated carbon and then drying, or spraying the aqueous solution of the acidic compound in the form of mist / mist on the activated carbon Then, a method of drying is preferable.
  • the metal salt in the present invention preferably contains a trivalent metal element having a third ionization energy of 30 to 35 eV or a tetravalent or higher metal element having a fourth ionization energy of 30 to 55 eV.
  • the third ionization energy of the trivalent metal element contained in the metal salt is less than 30 eV
  • the fourth ionization energy of the tetravalent or more metal element contained in the metal salt is less than 30 eV
  • the metal element is trivalent or more. If it is not contained, the reaction between the siloxane gas adsorbed on the activated carbon and the metal salt becomes slow, and a sufficiently low desorption property cannot be obtained.
  • the third ionization energy of the trivalent metal element is larger than 35 eV, or the fourth ionization energy of the tetravalent or higher metal element is larger than 55 eV, handling becomes difficult from the viewpoint of safety.
  • the metal element in the present invention is preferably Ti, V, Mn, Fe, Co, Ga, or Zr from the viewpoint of cost and environmental pollution. Ti, Fe, Ga, or Zr is more preferable.
  • the type of metal salt in the present invention is not particularly limited, but is preferably liquid or solid under normal temperature and normal pressure (25 ° C., 1 atm) conditions. This is because if it is a gas at room temperature and normal pressure, it becomes difficult to support the activated carbon.
  • common salts such as sulfates, nitrates, phosphates, carbonates, bicarbonates, citrates, acetates and chlorides can be used, but chlorides or sulfates are more preferred. preferable.
  • the metal salt in the present invention preferably has a solubility of 1 g or more. If the solubility is less than 1 g, it becomes difficult to support the metal salt on the activated carbon surface, and the siloxane gas desorption cannot be sufficiently suppressed.
  • solubility here refers to the mass of the solute which melt
  • the method for supporting the metal salt on the activated carbon in the present invention is not particularly limited, but the method of impregnating the activated carbon in an aqueous solution of the metal salt and then drying, or spraying the activated carbon in the form of a mist / mist of the aqueous metal salt Then, a method of drying is preferable.
  • the supported amount of the acidic compound or metal salt supported on the activated carbon is 0.1 to 20% by weight. It is preferably 1 to 15% by weight, and more preferably 1 to 10% by weight. If the loading is less than 0.1% by weight, the content of the acidic compound or metal salt is small, so that the siloxane gas can not be sufficiently eliminated. If the loading amount is greater than 20% by weight, the loading amount of the acidic compound or metal salt is large, so that the pores of the activated carbon are blocked and cannot be adsorbed efficiently.
  • the siloxane removal filter in the present invention preferably contains a siloxane remover.
  • the method for producing the siloxane removal filter is not particularly limited, but a production method in which the sheet-like siloxane removal agent is processed into a planar shape, a pleated shape, or a honeycomb shape is preferable.
  • a pleated shape as a direct flow filter, or when using a honeycomb shape as a parallel flow filter, the contact area with the gas to be treated is increased to improve removal efficiency, and the deodorizing filter has a low pressure loss. Can be achieved simultaneously.
  • the method for forming the siloxane remover in the present invention into a sheet is not particularly limited, and a conventionally known processing method can be used.
  • a wet sheeting method obtained by dispersing and dehydrating siloxane remover particles together with sheet constituting fibers in water
  • (b) airlaid obtained by dispersing siloxane remover particles together with sheet constituting fibers in the air.
  • C A method in which a siloxane remover is filled between two or more layers of a nonwoven fabric or woven fabric, a net-like material, a film, and a film by thermal bonding, (d) an emulsion adhesive, a solvent-based adhesive is used.
  • Use such as a method of bonding and supporting a siloxane remover on a breathable material, and a method of (f) mixing and integrating a siloxane remover into a fiber or resin.
  • Suitable methods according can be used. It is preferable to use the processing methods (b), (c), and (e) because there is no need to use a surfactant, a water-soluble polymer, etc., and the pores of the porous body itself can be prevented. .
  • the siloxane remover and the siloxane removal filter in the present invention can be widely used for the purpose of reducing siloxane gases in indoors, in vehicles, wallpaper, furniture, interior materials, resin moldings, electrical equipment, and the like.
  • it is preferably used for the purpose of removing siloxane gases contained in the air.
  • a granular material in a container such as a breathable box, bag, or net, and leave or aeration.
  • the surface area analysis range is set to 0.01 to 0.15 under the BET condition, and the BET specific surface area [m 2 / g ] was requested. Further, the total pore volume [cc / g] was determined from the data of the relative pressure 0.95.
  • the moisture adsorption amount [mg / g] at a temperature of 25 ° C. and a relative humidity of 40% was calculated.
  • the water adsorption amount ratio [ ⁇ ] was calculated by dividing the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 40% by the water adsorption amount at a temperature of 25 ° C. and a relative humidity of 90%.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • Example 3 1 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and then treated at room temperature for 4 hours. . Thereafter, the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • coconut shell activated carbon BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • Example 4 1 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and then treated at room temperature for 4 hours. . Thereafter, the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • coconut shell activated carbon BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coconut shell activated carbon BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m
  • BET specific surface area 1880 m 2 / g
  • total pore volume 0.83 cc / g
  • particle size 355 to 500 ⁇ m
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coconut shell activated carbon BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m
  • BET specific surface area 1880 m 2 / g
  • total pore volume 0.83 cc / g
  • particle size 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • Example 7 1 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and then treated at room temperature for 4 hours. . Thereafter, the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • coconut shell activated carbon BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 0.1 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and then treated at room temperature for 4 hours. . Thereafter, the resultant was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight to obtain hydrophilic activated carbon.
  • a sodium hypochlorite aqueous solution was prepared by mixing 1.4 g of sodium hypochlorite solution (manufactured by Wako Pure Chemical Industries) and 1.4 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) and the prepared sodium hypochlorite aqueous solution were stirred and mixed. Then, the activated carbon hydrophilized by drying at 80 degreeC overnight was obtained.
  • sodium hypochlorite aqueous solution manufactured by mixing 1.4 g of sodium hypochlorite solution (manufactured by Wako Pure Chemical Industries) and 1.4 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500
  • ⁇ Comparative Example 3> 25 mg of p-toluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd., molecular weight 172, pKa ⁇ 2.80, solubility 67 g) is dissolved in 650 mg of ion-exchanged water, and the aqueous solution and coal-based activated carbon (BET specific surface area: 1460 m 2 / g). 475 mg), the total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m). Thereafter, drying was performed at 80 ° C.
  • ⁇ Comparative example 4> 350 mg of Nafion 10% dispersion DE1021 (manufactured by Wako Pure Chemical Industries, Ltd., molecular weight 1000 to 10000, pKa -3.10) was mixed with 300 mg of ion-exchanged water, and the mixed solution and coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) and 475 mg were mixed with stirring. Thereafter, after drying at 80 ° C. for 6 hours, classification was carried out to obtain a sample carrying 5% by weight of Nafion having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • Tables 1 and 2 show the results of BET specific surface area measurement, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement for Examples 1 to 9 and Comparative Examples 1 to 4.
  • Examples 1 to 9 according to the present invention are less desorbable than the case where the water adsorption amount ratio is less than 0.10 (Comparative Examples 1 to 4). It turns out that it is excellent.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • Table 3 shows the results of BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement for Examples 1, 10 to 14, and Comparative Examples 5 to 6.
  • Example 1 and Examples 10 to 14 of the present invention have no acidic compound supported (Comparative Example 5), and the amount of acidic compound supported is 20% by weight. It can be seen that it is excellent in low detachability as compared with the case of larger than (Comparative Example 6).
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere. 25 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 650 mg of ion-exchanged water, and the aqueous solution and 475 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a 5% by weight iron (III) sulfate-supporting sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere. 25 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 650 mg of ion-exchanged water, and the aqueous solution and 475 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, the sample was dried at 80 ° C. for 6 hours and then classified to obtain a 5 wt% iron (III) sulfate loaded sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • a sodium hypochlorite aqueous solution was prepared by mixing 1.4 g of sodium hypochlorite solution (manufactured by Wako Pure Chemical Industries) and 1.4 g of ion-exchanged water. 3 g of coconut shell activated carbon (BET specific surface area: 1880 m 2 / g, total pore volume: 0.83 cc / g, particle size: 355 to 500 ⁇ m) and the prepared sodium hypochlorite aqueous solution were stirred and mixed. Thereafter, washing was performed 5 times with 100 ml of ion-exchanged water, followed by drying at 80 ° C. overnight to obtain a hydrophilic activated carbon.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • iron (III) sulfate n hydrate manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.
  • aqueous solution and 475 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a 5% by weight iron (III) sulfate-supporting sample having a particle diameter of 355 to 500 ⁇ m.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • hexaamminecobalt (III) chloride manufactured by Wako Pure Chemical Industries, solubility 26 g or more
  • hexaamminecobalt (III) chloride manufactured by Wako Pure Chemical Industries, solubility 26 g or more
  • the sample was dried at 80 ° C. for 6 hours and then classified to obtain a sample containing 5% by weight of hexaamminecobalt (III) chloride having a particle diameter of 355 to 500 ⁇ m.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • gallium sulfate (III) hydrate manufactured by Wako Pure Chemical Industries, solubility of 18 g or more
  • aqueous solution and 475 mg of hydrophilic activated carbon were mixed with stirring.
  • classification was performed to obtain a sample carrying 5% by weight of gallium (III) sulfate having a particle diameter of 355 to 500 ⁇ m.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • zirconium sulfate (IV) tetrahydrate manufactured by Wako Pure Chemical Industries, solubility of 52 g at 18 ° C.
  • aqueous solution and 475 mg of hydrophilic activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a sample carrying 5% by weight of zirconium (IV) sulfate having a particle diameter of 355 to 500 ⁇ m.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • nitric acid 1 g
  • 12 g of ion-exchanged water were mixed to prepare an aqueous nitric acid solution.
  • 3 g of coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • the mixture was treated at room temperature for 4 hours.
  • the mixture was filtered, washed 10 times with 100 ml of ion-exchanged water, and dried at 80 ° C. overnight.
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C.
  • BET specific surface area 1460 m 2 / g
  • total pore volume 0.92 cc / g
  • ruthenium chloride n-hydrate manufactured by Wako Pure Chemical Industries, solubility 5 g or more
  • aqueous solution and coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0. 92 cc / g, particle size: 355 to 500 ⁇ m
  • 475 mg were mixed with stirring. Thereafter, the sample was dried at 80 ° C. for 6 hours and then classified to obtain a sample supporting 5% by weight of ruthenium chloride having a particle diameter of 355 to 500 ⁇ m.
  • the obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • Tables 4 and 5 show the results of BET specific surface area, total pore volume measurement, moisture adsorption amount measurement, and siloxane adsorption / desorption measurement for Examples 15 to 23 and Comparative Examples 1 to 2 and 7 to 10. Show. As is apparent from Tables 4 and 5, Examples 15 to 23 according to the present invention are low in comparison with the cases where the water adsorption amount ratio is less than 0.10 (Comparative Examples 1 to 2 and 7 to 10). It turns out that it is excellent in detachability.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • 2 mg of iron (III) sulfate n-hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 1380 mg of ion-exchanged water, and the aqueous solution and 998 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a 0.2 wt% iron (III) sulfate supporting sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • a nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere. 20 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 1350 mg of ion-exchanged water, and the aqueous solution and 980 mg of hydrophilicized activated carbon were mixed with stirring. Thereafter, after drying at 80 ° C. for 6 hours, classification was carried out to obtain a sample supporting 2% by weight of iron (III) sulfate having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • 100 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 1240 mg of ion-exchanged water, and the aqueous solution and 900 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a 10% by weight iron (III) sulfate supporting sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • 150 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility 246 g at 0 ° C.) was dissolved in 1170 mg of ion-exchanged water, and the aqueous solution and 850 mg of hydrophilic activated carbon were mixed with stirring. Thereafter, the sample was dried at 80 ° C. for 6 hours and classified to obtain a sample carrying 15% by weight of iron (III) sulfate having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • 200 mg of iron (III) sulfate n-hydrate (manufactured by Wako Pure Chemical Industries, solubility 246 g at 0 ° C.) was dissolved in 1100 mg of ion-exchanged water, and the aqueous solution and 800 mg of hydrophilic activated carbon were mixed with stirring. Thereafter, drying was performed at 80 ° C. for 6 hours, followed by classification to obtain a 20% by weight iron (III) sulfate-supporting sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • nitric acid aqueous solution was prepared by mixing 5 g of nitric acid (1.38) (manufactured by Nacalai Tesque) and 12 g of ion-exchanged water. 3 g of coal-based activated carbon (BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m) was added to the prepared nitric acid aqueous solution and heated to about 100 ° C. Reflux treatment for hours was performed. After cooling to room temperature, it was filtered, washed 10 times with 100 ml of ion exchange water, and dried at 80 ° C. overnight.
  • coal-based activated carbon BET specific surface area: 1460 m 2 / g, total pore volume: 0.92 cc / g, particle size: 355 to 500 ⁇ m
  • hydrophilicized activated carbon was obtained by treatment at 350 ° C. for 4 hours in an air atmosphere.
  • 300 mg of iron (III) sulfate n hydrate (manufactured by Wako Pure Chemical Industries, solubility of 246 g at 0 ° C.) was dissolved in 970 mg of ion-exchanged water, and the aqueous solution and 700 mg of hydrophilized activated carbon were mixed with stirring. Thereafter, the sample was dried at 80 ° C. for 6 hours and classified to obtain a 30% by weight iron (III) sulfate loaded sample having a particle diameter of 355 to 500 ⁇ m. The obtained sample was subjected to BET specific surface area, total pore volume measurement, moisture adsorption amount ratio measurement, and siloxane adsorption / desorption measurement.
  • Table 6 shows the results of BET specific surface area, total pore volume measurement, moisture adsorption amount measurement, and siloxane adsorption / desorption measurement for Examples 16, 24 to 28, and Comparative Examples 5 and 11.
  • Example 16 and Examples 24-28 of the present invention when the metal salt was not supported (Comparative Example 5), the amount of the metal salt supported was 20% by weight. It can be seen that it is excellent in low detachability as compared with the case of larger than (Comparative Example 11).
  • the siloxane gas can be efficiently removed, and since the siloxane gas once removed has few problems of desorption due to environmental changes, it can be expected to greatly contribute to the industry.

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Abstract

[Problème] Fournir : un agent d'élimination de siloxane qui est capable d'éliminer efficacement les gaz de siloxane, et qui a de très faibles taux de désorption; et un filtre d'élimination de siloxane dans lequel l'agent d'élimination de siloxane est utilisé. [Solution] La présente invention concerne un agent d'élimination de siloxane dans lequel 0,1 à 20 % en poids d'un composé acide ou un sel métallique est soutenu par du charbon actif, ledit agent d'élimination de siloxane étant caractérisé en ce que le rapport d'adsorption d'eau de l'agent d'élimination de siloxane, qui est obtenu par division de la quantité d'adsorption d'eau à 25 °C et 40 % d'humidité relative par la quantité d'adsorption d'eau à 25 °C et 90 % d'humidité relative, est d'au moins 0,10.
PCT/JP2015/066563 2014-06-10 2015-06-09 Agent d'élimination de siloxane et filtre d'élimination de siloxane utilisant celui-ci WO2015190459A1 (fr)

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JP2014-119454 2014-06-10
JP2014119454A JP6500353B2 (ja) 2014-06-10 2014-06-10 シロキサン除去剤およびそれを用いたシロキサン除去フィルタ

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002058996A (ja) * 2000-08-23 2002-02-26 Nkk Corp 消化ガス精製剤および消化ガスの精製方法
JP2004148170A (ja) * 2002-10-29 2004-05-27 Jfe Engineering Kk 消化ガス精製剤、消化ガス精製方法およびその装置
JP2005111377A (ja) * 2003-10-08 2005-04-28 Jfe Engineering Kk シロキサン化合物含有ガスの精製方法とその装置、および消化ガス発電設備
JP2013103154A (ja) * 2011-11-11 2013-05-30 Osaka Gas Co Ltd 多孔質物質、シロキサン除去剤及びそれを用いたフィルター
WO2013169392A1 (fr) * 2012-05-07 2013-11-14 Donaldson Company, Inc Matières, procédés et dispositifs pour l'élimination de contaminant siloxane

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002058996A (ja) * 2000-08-23 2002-02-26 Nkk Corp 消化ガス精製剤および消化ガスの精製方法
JP2004148170A (ja) * 2002-10-29 2004-05-27 Jfe Engineering Kk 消化ガス精製剤、消化ガス精製方法およびその装置
JP2005111377A (ja) * 2003-10-08 2005-04-28 Jfe Engineering Kk シロキサン化合物含有ガスの精製方法とその装置、および消化ガス発電設備
JP2013103154A (ja) * 2011-11-11 2013-05-30 Osaka Gas Co Ltd 多孔質物質、シロキサン除去剤及びそれを用いたフィルター
WO2013169392A1 (fr) * 2012-05-07 2013-11-14 Donaldson Company, Inc Matières, procédés et dispositifs pour l'élimination de contaminant siloxane

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