WO2010082456A1 - Matériau absorbant l'humidité régénératif - Google Patents

Matériau absorbant l'humidité régénératif Download PDF

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Publication number
WO2010082456A1
WO2010082456A1 PCT/JP2010/000031 JP2010000031W WO2010082456A1 WO 2010082456 A1 WO2010082456 A1 WO 2010082456A1 JP 2010000031 W JP2010000031 W JP 2010000031W WO 2010082456 A1 WO2010082456 A1 WO 2010082456A1
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porous body
moisture absorbent
regenerated
pores
regenerative
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PCT/JP2010/000031
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English (en)
Japanese (ja)
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佐野光宏
大城智史
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パナソニック株式会社
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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
    • B01D53/26—Drying gases or vapours
    • B01D53/28—Selection of materials for use as drying agents
    • 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
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/183—Physical conditioning without chemical treatment, e.g. drying, granulating, coating, irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
    • 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
    • B01J20/28054—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 surface properties or porosity
    • B01J20/28078—Pore diameter
    • B01J20/28083—Pore diameter being in the range 2-50 nm, i.e. mesopores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • 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
    • B01D2253/306—Surface area, e.g. BET-specific surface
    • 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
    • B01D2253/308—Pore size

Definitions

  • the present invention relates to a regenerative moisture absorbent that absorbs moisture in the air at room temperature and releases moisture by heat regeneration treatment.
  • porous materials such as zeolite and silica gel have been known.
  • zeolite and silica gel have a problem that the amount of moisture absorbed and released is small, and various approaches have been made to solve this problem.
  • Patent Document 1 discloses a regenerated hygroscopic material in which a deliquescent inorganic compound is supported on a conductive porous ceramic body having a porosity of 20 to 90%.
  • Patent Document 2 has a structure in which adjacent substantially spherical pores communicate with each other through small holes, and a deliquescent substance is carried in the pores of a continuous porous material having a porosity of 50 to 95%.
  • a humidity control material is disclosed.
  • the present invention uses a porous body having pores having a pore diameter of 1 nm to 50 nm, thereby improving the amount of absorbed and released per unit time and regenerating moisture absorption capable of heat regeneration at a lower temperature (less than 80 ° C.).
  • An agent is provided.
  • the present inventors have found that the use of a porous body having pores having a pore diameter of 1 nm to 50 nm is extremely effective in solving the problems of the above-described conventional techniques.
  • the present invention is composed of a porous body including a skeleton, pores formed by the skeletons, and a deliquescent substance disposed on the surface of the porous body. It is a chloride or bromide of at least one metal selected from the group consisting of magnesium, and the pore diameter is 1 nm to 50 nm.
  • Such a configuration is considered to make it difficult for water molecules to enter and exit the pores, so that the amount of absorbed and released per unit time of the regenerative moisture absorbent can be improved. For the same reason, water molecules can be released from the inside of the pores at a lower temperature.
  • FIG. 1 is a schematic view showing a basic configuration of an embodiment of a regenerated quality moisture absorbent according to the present invention.
  • FIG. 2 is an enlarged view showing an R portion of FIG.
  • FIG. 1 is a schematic diagram showing a basic configuration of an embodiment of the regenerated moisture absorbent according to the present invention.
  • FIG. 2 is an enlarged view of a portion R in FIG.
  • the regenerative moisture absorbent 1 of the present embodiment is mainly composed of a porous body 2 and a deliquescent material 3 disposed on the surface of the porous body 2.
  • the porous body 2 includes a skeleton 11 and pores 12 formed by the skeletons 11.
  • the diameter of the pores 12 has a size of 1 nm to 50 nm.
  • the pore diameter shown in the present invention means a pore diameter showing a peak after obtaining a Log differential pore volume distribution after measuring the pore distribution in nitrogen gas adsorption using a commercially available pore distribution measuring device. .
  • porous body 2 and the deliquescent material 3 constituting the regenerative adsorbent 1 of the present embodiment will be described.
  • the porous body 2 will be described.
  • a porous body 2 shown in FIG. 1 is a member that serves as a support for supporting a deliquescent material 3 to be described later, and a member capable of absorbing and releasing moisture by adsorbing and desorbing water molecules.
  • the skeletons 11 form a regular shape or an irregular shape, and the gaps form pores 12.
  • the skeleton 11 is usually composed of an inorganic oxide, and is preferably composed of silica or a composite of silica and alumina from the viewpoint of ease of production.
  • the porous body 2 is preferably a powdered solid having a representative diameter of about 0.5 ⁇ m to 50 ⁇ m.
  • the porosity is preferably about 30 to 80%.
  • the shape of the porous body 2 is described in a spherical shape, it is not limited to a spherical shape.
  • polyhedral shapes such as a triangular pyramid, a cube, a rectangular parallelepiped, and an octahedron, a conical shape, and the like can be given.
  • it is spherical, it is not limited to a true sphere, and there may be distortion or irregularities on the surface. These distortions and surface irregularities are also applied to polyhedral and conical shapes.
  • examples of the porous body 2 include zeolite, sepiolite, silica gel, mesoporous silica and the like, and are not particularly limited.
  • zeolite and mesoporous silica are preferably mentioned from the viewpoint of obtaining the effect of the present invention more reliably by improving the amount of absorption / release per unit time and enabling heat regeneration at a lower temperature (less than 80 ° C.). It is done.
  • mesoporous silica that water molecules are considered to easily enter and exit from the pores because of the large pore diameter is preferable, and the pore diameter is defined as mesoporous from 1 nm or more to the upper limit of 50 nm. (More preferably, the upper limit is 10 nm).
  • the pore diameter is less than 1 nm, the water molecules are prevented from entering and exiting the pores, and the water molecule absorption / release rate is slow. That is, the amount of absorption / release per unit time is small.
  • the pore diameter is larger than 50 nm, the deliquescent substance that has absorbed and liquefied moisture closes the pores, thereby reducing the amount of absorption and release per unit time.
  • the deliquescent material that has been liquefied by sucking moisture flows out of the pores, making it difficult to handle practically.
  • the pore diameter is 1 nm to 50 nm
  • the pore diameter is large, water molecules easily enter and exit the pores, so that the water molecule absorption / release rate is slow. That is, the amount of absorption / release per unit time is large.
  • the deliquescent substance that has been liquefied by absorbing moisture does not block the pores, and the amount of absorption / release per unit time does not decrease.
  • the deliquescent material that has been liquefied by sucking moisture does not flow out of the pores, it is practically easy to handle.
  • the pore diameter is 1 nm to 10 nm
  • the absorption / release amount per unit time does not decrease, and the deliquescent substance that has been liquefied by absorbing moisture does not flow out of the pores. It was big.
  • the specific surface area of the porous body 2 is preferably 300 m 2 / g or more.
  • the specific surface area shown in the present invention indicates a BET (Brunauer, Emmett, Teller) specific surface area in which nitrogen gas measured by a commercially available specific surface area measuring device is an adsorbate.
  • the specific surface area of the porous body 2 is 300 m 2 / g or more, the deliquescent material 3 described later can be finely dispersed and arranged, and water molecules of the porous body 2 itself can be adsorbed. Since it can have many adsorption points, it is preferable at the point which can improve the absorption-and-release amount per unit time more.
  • the specific surface area of the porous body 2 may be 300 m 2 / g or more.
  • the skeleton 11 is spherical silica having a specific gravity of 2.0 g / cm 3 and a diameter of 1 nm, it is theoretically increased to 3000 m 2 / g. be able to.
  • the specific surface area is less than 300 m 2 / g, the deliquescent material 3 cannot be dispersed and disposed, and the porous body 2 itself cannot have a large number of water molecule adsorption points. The amount of absorption / release per hour cannot be further improved. Moreover, it is theoretically difficult to make the specific surface area larger than 3000 m 2 / g.
  • a deliquescent material 3 shown in FIG. 1 or FIG. 2 is a member for adsorbing and releasing moisture by adsorbing and desorbing water molecules, which are disposed on the inside and outside surfaces of the porous body 2.
  • the deliquescent material 3 is at least one metal chloride or bromide selected from the group consisting of calcium, lithium and magnesium. Specific examples include calcium chloride, lithium chloride, magnesium chloride, calcium bromide, lithium bromide, magnesium bromide or hydrates of these substances.
  • Preferred examples of the deliquescent substance 3 include calcium chloride, lithium chloride, and lithium bromide from the viewpoint of more reliably obtaining the effects of the present invention.
  • lithium bromide is particularly preferable from the viewpoint of low corrosivity.
  • the content of the deliquescent substance 3 is preferably 5% by mass or more and 50% by mass or less.
  • the content described here is the ratio of the mass of the deliquescent material 3 to the total mass of the porous body 2 and the deliquescent material 3. It is preferable that the content of the deliquescent material 3 is 5% by mass or more because the amount of moisture that can be absorbed and released can be further improved. Further, when the content of the deliquescent material 3 is 50% or less, wetting occurs on the surface of the regenerative moisture absorbent 1 even in a high humidity environment such as 40 ° C. and 90% RH (relative humidity). This is preferable because there is not.
  • the content of the deliquescent substance 3 is less than 5% by mass, it is difficult to further improve the amount of water that can be absorbed and released.
  • the content of the deliquescent material 3 is larger than 50%, the surface of the regenerative moisture absorbent 1 is not preferable in a high humidity environment.
  • an antibacterial agent (not shown) may be added to the regenerated quality moisture absorbent 1.
  • an antibacterial agent (not shown) may be added to the regenerated quality moisture absorbent 1.
  • the antibacterial agent is not particularly limited as long as it can be dispersed on the surface of the porous body 2 or the surface of the deliquescent substance 3 and can obtain an antibacterial effect.
  • antibacterial agents include organic antibacterial agents such as wasabi and inorganic antibacterial agents such as silver, zinc, and copper. From the viewpoint of durability such as light resistance and oxidation resistance, it is preferable to use an inorganic antibacterial agent.
  • Preferred examples of the inorganic antibacterial agent include a silver-based inorganic antibacterial agent “trade name: Novalon” manufactured by Toagosei Co., Ltd. and an inorganic antibacterial agent “trade name: Zeomic” manufactured by Sinanen Zeomic. These antibacterial agents are preferred because they can be expected to have an antifungal effect.
  • the amount of the antibacterial agent added to the regenerated moisture absorbent 1 is preferably 0.1 to 5% by mass. It is preferable that the amount of the antibacterial agent added to the regenerated moisture absorbent 1 is 0.1% by mass or more because antibacterial properties can be obtained more reliably. It is preferable that the amount of the antibacterial agent added to the regenerated moisture absorbent 1 is 5% by mass or less because it is difficult to prevent moisture absorption and release.
  • the regenerative hygroscopic agent 1 of the present embodiment uses the porous body 2 having pores with pore diameters larger than 1 nm, so that the absorption / release amount per unit time is improved and the temperature is lower. Thermal regeneration at (less than 80 ° C.) can be performed.
  • a predetermined amount of the porous body 2 is dispersed in water in a container
  • a predetermined amount of the deliquescent material 3 is added to the container containing the aqueous dispersion of the porous body 2 and stirring is continued (dispersion).
  • This dispersion method is not particularly limited, and can be performed using a known dispersion method of powder in water.
  • a predetermined amount of the porous body 2 is charged into an eggplant-shaped flask, and then a predetermined amount of water is charged. Then, the porous body 2 is dispersed in water by stirring using a stirrer.
  • a predetermined amount of the deliquescent substance 3 is added to the stirring eggplant type flask, and the deliquescent substance 3 is dissolved in water by continuing the stirring.
  • the amount of water to be added is an amount that can sufficiently dissolve the deliquescent material 3. Stirring is continued until the porous body 2 is sufficiently dispersed in water and all the deliquescent material 3 is dissolved in water. When about 10 g of the porous body 2 is used, about 1 to 3 hours are preferable.
  • the ratio of the deliquescent material 3 to the porous body 2 and the deliquescent material 3 is 5 to 50% by mass.
  • the content of the deliquescent material 3 is 5% by mass or more because the amount of moisture that can be absorbed and released can be further improved.
  • the content of the deliquescent material 3 is 50% or less because wetting does not occur on the surface of the regenerative moisture absorbent 1 even in a high humidity environment such as 40 ° C. and 90% RH. .
  • an antibacterial agent when added, it is preferably added in the dispersion step.
  • the introduction of the antibacterial agent in the dispersion step may be performed at any timing.
  • the added amount of the antibacterial agent can be made 0.1 to 5% by mass with respect to the regenerated moisture absorbent 1 finally obtained.
  • the amount of the antibacterial agent added to the regenerative moisture absorbent 1 is 0.1% by mass or more because antibacterial properties can be obtained more reliably.
  • the amount of the antibacterial agent added to the regenerated quality hygroscopic agent 1 is 5% by mass or less because it is difficult to prevent moisture absorption and release.
  • aqueous solution in which the porous body 2 obtained in the dispersion step is dispersed and the deliquescent material 3 is dissolved (hereinafter referred to as a dispersion aqueous solution) is dried under reduced pressure (vacuum drying step).
  • This vacuum drying method is not particularly limited, and can be performed using a known vacuum drying method. For example, by using a rotary evaporator and drying under reduced pressure until the water in the eggplant-shaped flask containing the dispersed aqueous solution evaporates, the deliquescent material 3 is relatively uniformly dispersed on the surface of the porous body 2. A regenerated moisture absorbent 1 can be obtained.
  • the reduced-pressure drying time is preferably about 1 to 3 hours when about 10 g of the porous body 2 is used.
  • the conditions for the evaporator are not particularly limited.
  • the freshly dried regenerated moisture absorbent 1 obtained in the vacuum drying step is dried at a high temperature (high temperature drying step).
  • This high temperature drying method is not particularly limited and can be performed using a known high temperature drying method. For example, it can be dried by putting it in a thermostatic bath maintained at 100 ° C.
  • the high temperature drying time is preferably about 10 to 20 hours when about 10 g of the regenerated moisture absorbent 1 is used.
  • the regenerated moisture absorbent 1 obtained in the high temperature drying step is fired (firing step).
  • This firing method is not particularly limited, and can be performed using a known firing method. For example, when about 10 g of the regenerated moisture absorbent 1 is used, the regenerated moisture absorbent 1 is placed in a firing furnace, heated at a temperature rising rate of 200 ° C./h, and held at 550 ° C. for 5 to 10 hours.
  • the regenerated quality moisture absorbent 1 can be obtained.
  • water is used as the dispersion solvent for the porous body 2, but the same effect can be obtained by using an organic solvent that can dissolve the deliquescent material 3 and enter the pores of the porous body 2.
  • a regenerated quality moisture absorbent 1 is obtained.
  • mesoporous silica which is a porous body, was prepared by the following procedure. 30 g of tetraethoxysilane, 45 g of ethanol and 10 g of isopropyl alcohol were mixed (hereinafter referred to as solution A), and stirring was performed for 1 hour. Next, 7 g of dodecylamine, 90 g of water and 0.3 g of hydrochloric acid were mixed (hereinafter referred to as solution B), and stirring was performed for 1 hour. Next, the solution A was dropped into the stirring solution B over about 5 minutes, and then the stirring was continued for 18 hours.
  • the produced precipitate was repeatedly subjected to suction filtration and water washing, and washed with water until no bubbles were formed (the amount of water used was about 3 L).
  • the washed precipitate was placed in a 100 ° C. constant temperature bath and dried for 12 hours.
  • the dried precipitate was placed in a firing furnace, heated to 550 ° C. over 2 hours, held for 5 hours, naturally cooled to complete mesoporous silica.
  • the specific surface area and pore diameter of mesoporous silica were measured by a specific surface area / pore distribution measuring device manufactured by Micromeritics, and were 866 m 2 / g and 2.5 nm, respectively.
  • a deliquescent material was loaded on mesoporous silica.
  • 8 g of the prepared mesoporous silica and 80 g of water were placed in an eggplant-shaped flask and stirred for 1 hour.
  • 1.6 g of commercially available calcium chloride (anhydrous) was put into an eggplant-shaped flask, and further stirred for 1 hour (dispersing step).
  • the eggplant-shaped flask was attached to a rotary evaporator, the bath temperature was set to 70 ° C., the ultimate vacuum of the aspirator was set to 5000 Pa, and the rotation speed was set to 120 rotations / min, and vacuum drying was performed (vacuum drying step).
  • a sample was taken out from the eggplant-shaped flask, placed in a thermostatic bath maintained at 100 ° C., and dried for 12 hours (high temperature drying step) to complete a regenerative moisture absorbent.
  • Example 2 A regenerative hygroscopic agent was prepared in the same procedure and conditions as in Example 1 except that zeolite “trade name: molecular sieve (13X)” manufactured by Union Showa Co., Ltd. was used as the porous body. When the pore diameter was measured by the same procedure and conditions as in Example 1, it was 1 nm.
  • Example 1 A zeolite “trade name: molecular sieve (product number: ABSCENTS 2000)” manufactured by Union Showa Co., Ltd. was prepared as a regenerative moisture absorbent. When the pore diameter was measured by the same procedure and conditions as in Example 1, it was less than 1 nm, which was less than the measurement limit.
  • Comparative Example 2 A regenerative hygroscopic agent was produced in the same procedure and under the same conditions as in Example 1 except that zeolite “trade name: molecular sieve (product number: ABSCENTS 2000)” manufactured by Union Showa Co., Ltd. was used as the porous body.
  • zeolite “trade name: molecular sieve (product number: ABSCENTS 2000)” manufactured by Union Showa Co., Ltd. was used as the porous body.
  • each regenerated quality hygroscopic sample was dried at 100 ° C. for 3 hours. Then, 1.0 g of each regenerative moisture absorbent was measured and spread on a petri dish made of styrene. Then, after holding each regenerative moisture absorbent sample in a constant temperature and humidity chamber set to 20 ° C. and 40% RH for 10 minutes, the sample was taken out and the mass was measured.
  • the regenerated quality moisture absorbents of Examples 1 and 2 according to the present invention have a moisture absorption rate superior to the regenerated quality moisture absorbents of Comparative Examples 1 and 2.
  • Example 1 using mesoporous silica having pores having a pore diameter of 2.5 nm as the porous body had a higher moisture absorption rate.
  • each regenerative moisture absorbent sample was kept in a constant temperature and humidity chamber at 20 ° C. and 40% RH for 24 hours to absorb moisture. Then, 1.0 g of each regenerative moisture absorbent was measured and spread on a petri dish made of styrene. Thereafter, each regenerated moisture absorbent sample was held in a constant temperature and humidity chamber set to 40 ° C. and 13% RH for 3 hours to release moisture absorbed, and then taken out and measured for mass.
  • the regenerated moisture absorbents of Examples 1 and 2 according to the present invention are much larger during regeneration at a lower temperature (40 ° C.) than the regenerated moisture absorbents of Comparative Examples 1 and 2. It was confirmed that heat regeneration was possible. In particular, it was confirmed that Example 1 in which mesoporous silica having pores having a pore diameter of 2.5 nm was used as the porous body had a larger amount of heat regeneration.
  • the regenerative hygroscopic agent of the present invention can improve the absorption / release amount per unit time by using a porous body having pores having a pore diameter larger than 1 nm. Also, less heat energy is required for heat regeneration.
  • the regenerative moisture absorbent of the present invention improves the amount of absorbed and released per unit time.
  • the regenerative moisture absorbent is disposed in a residential space where dehumidification is required, such as a clog box, a closet, and a bathroom.
  • Can be dehumidified can also be used as a regenerative dehumidifier that can be regenerated by heat at lower temperatures (less than 80 ° C.) and can be used repeatedly.
  • the regenerated dehumidifier of the present invention is carried on the desiccant rotor of the desiccant type dehumidifier, less heat energy is required for regeneration, so that it can be used as an energy saving desiccant type dehumidifier.
  • it can be used as a humidifying device by using a desiccant rotor carrying the regenerative hygroscopic agent of the present invention, absorbing moisture from the outside air, and introducing the moisture released by heat regeneration into the room.
  • the present invention is useful for dehumidifiers, dehumidifiers, humidifiers and the like because the amount of absorbed and released per unit time is improved.

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Abstract

La présente invention concerne un matériau absorbant l'humidité régénératif qui se présente comme un matériau poreux (2) comportant des squelettes (11) et des pores (12) formés par les squelettes (11) et une substance déliquescente (3) disposée sur la surface du matériau poreux (2), cette substance déliquescente étant un chlorure ou un bromure d'au moins un métal choisi parmi le calcium, le lithium et le magnésium, et le diamètre de chacun des pores (12) étant de 1 à 50 µm. Ce matériau absorbant présente une capacité améliorée d'absorption/libération par unité de temps.
PCT/JP2010/000031 2009-01-16 2010-01-06 Matériau absorbant l'humidité régénératif WO2010082456A1 (fr)

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CN108883393A (zh) * 2016-03-30 2018-11-23 大阪瓦斯株式会社 气体吸收剂、二氧化碳分离回收系统、二氧化碳分离回收方法
US10175249B2 (en) 2010-05-17 2019-01-08 Board Of Regents, The University Of Texas System Proteomic identification of antibodies

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JP6792774B2 (ja) * 2015-06-05 2020-12-02 国立大学法人神戸大学 ケミカルヒートポンプ用コンポジットとその製造方法
US10184674B2 (en) 2015-09-16 2019-01-22 Kabushiki Kaisha Toshiba Vapor separator and dehumidifier using the same
CN114173906B (zh) * 2019-05-28 2024-05-14 W.L.戈尔及同仁股份有限公司 包含具有高湿气容量的抗污染物且非腐蚀性的干燥剂复合物的设备
KR102273615B1 (ko) * 2019-09-30 2021-07-06 대명물산 주식회사 고흡습성 항균방습제 조성물 및 이를 포함하는 고흡습성 항균방습제

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JP2003305330A (ja) * 2002-04-12 2003-10-28 Mitsubishi Chemicals Corp 多孔質吸湿剤

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US10175249B2 (en) 2010-05-17 2019-01-08 Board Of Regents, The University Of Texas System Proteomic identification of antibodies
CN108883393A (zh) * 2016-03-30 2018-11-23 大阪瓦斯株式会社 气体吸收剂、二氧化碳分离回收系统、二氧化碳分离回收方法

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