WO2010050417A1 - Moulage de billes de zéolite à résistance élevée et procédé de production desdites billes de zéolite - Google Patents

Moulage de billes de zéolite à résistance élevée et procédé de production desdites billes de zéolite Download PDF

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Publication number
WO2010050417A1
WO2010050417A1 PCT/JP2009/068288 JP2009068288W WO2010050417A1 WO 2010050417 A1 WO2010050417 A1 WO 2010050417A1 JP 2009068288 W JP2009068288 W JP 2009068288W WO 2010050417 A1 WO2010050417 A1 WO 2010050417A1
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weight
parts
zeolite
clay binder
molded body
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PCT/JP2009/068288
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English (en)
Japanese (ja)
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茂 平野
泰三 河本
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東ソー株式会社
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Priority to CN200980139885.0A priority Critical patent/CN102177093B/zh
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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
    • B01J20/10—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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
    • C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
    • C01B39/14—Type A
    • 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
    • B01D2253/304—Linear dimensions, e.g. particle shape, diameter
    • 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 zeolite bead molded body having high strength and particularly high wear resistance, and a method for producing the same.
  • a zeolite bead molded body used for a Freon desiccant for an air conditioner of an automobile is required to have particularly high strength and wear resistance so as not to be pulverized by vibration of an engine drive.
  • Zeolite bead moldings are widely used as desiccants, but recently, the demand for desiccants for automotive air conditioners is increasing. Since air conditioners for automobiles are exposed to vibration during use, they are pulverized and become clogged if their strength and wear resistance are low. Therefore, a desiccant having high strength and high wear resistance is required.
  • Patent Document 1 a method using an additive such as condensed phosphate as a binder
  • Patent Document 2 a method using a special needle crystal binder as a binder
  • Patent Document 3 a method of treating with an alkaline compound
  • all of these methods require special raw materials and special processing steps, and have been the cause of increased costs for desiccants.
  • the obtained molded body particles are sized to smooth the surface of the molded body and increase the sphericity, but a sufficient effect has not been obtained.
  • Patent Document 5 a method (Patent Document 5) is also known in which a high-strength pellet molded body is rounded by rolling sizing. In such a method, particles having high strength can be obtained, but a molded product having a high sphericity cannot be obtained, so that it cannot be used for a Freon desiccant for automobiles.
  • Japanese Unexamined Patent Publication No. 2001-261330 Japanese Unexamined Patent Publication No. 11-314913 Japanese Patent Laid-Open No. 4-198012 Japanese Unexamined Patent Publication No. 6-327968 Japanese Unexamined Patent Publication No. 10-87322
  • the object of the present invention is to provide strength (hydration pressure strength) and abrasion resistance of beads, especially 3A-type zeolite (K ion exchange A-type zeolite) and a clay binder, without using special raw materials and processes. It is intended to provide a method for improving the above.
  • the present inventors added a clay binder in an amount within a specific range at the time of rolling sizing after granulation.
  • the hydration pressure strength and wear resistance of the molded product are found to be remarkably improved, and the present invention has been completed.
  • the gist of the present invention resides in the following (1) to (10).
  • (1) Based on 100 parts by weight of zeolite and clay binder, after forming into beads by composition rolling granulation with a water content of 35 parts by weight or more, the solid weight of the molded body (excluding water) is increased to 100 parts by weight.
  • a method for producing a zeolite bead molded body in which 4 parts by weight or less of a clay binder is added, tumbled and sized, dried and fired.
  • the zeolite is preferably a K ion exchange type A zeolite.
  • the production method according to (4), wherein the zeolite crystal diameter is preferably 5 ⁇ m or less.
  • the total amount of the clay binder is preferably 10 parts by weight or more and 50 parts by weight or less with respect to 100 parts by weight of zeolite in the zeolite bead molded body.
  • the zeolite crystal diameter is 5 ⁇ m or less, the total amount of clay binder to 10 parts by weight or more and 50 parts by weight or less with respect to 100 parts by weight of the zeolite bead molded body, the hydration pressure strength of the zeolite bead molded body is 35 N or more, and the zeolite bead molding.
  • Zeolite bead molded body having a wear resistance of 1.5% or less and a bead diameter of 1.0 to 3.0 mm.
  • the zeolite bead molded product according to (8) wherein the total amount of the clay binder with respect to 100 parts by weight of zeolite exceeds 40 parts by weight and is 50 parts by weight or less.
  • a mixture of 35 parts by weight or more of moisture is formed into beads by rolling granulation with respect to 100 parts by weight of zeolite and clay binder, and then 4 parts by weight or less based on the weight of the molded body.
  • a zeolite desiccant with high strength and high wear resistance can be produced by adding clay clay and rolling and sizing, followed by drying and firing.
  • the zeolite bead molded body obtained by the method of the present invention is excellent in strength and wear resistance.
  • FIG. 1 It is a figure which shows the surface SEM image after the sizing of the molded object of Example 1.
  • FIG. It is a figure which shows the surface SEM image after the sizing of the molded object of Example 2.
  • FIG. It is a figure which shows the surface SEM image of the comparative example 1 (unshaped granulated body). It is a figure which shows the surface SEM image after the sizing of the molded object of the comparative example 3.
  • the method for producing a zeolite bead molded body according to the present invention comprises molding a composition having a water content of 35 parts by weight or more into a bead shape by rolling granulation with respect to 100 parts by weight of the zeolite and the clay binder, and then molding the solid content weight. After adding 4 parts by weight or less of a clay binder (excluding moisture) and rolling sizing, it is dried and fired.
  • the amount of water with respect to 100 parts by weight of the zeolite and clay binder varies depending on the particle size and surface area of the clay binder to be used, but is preferably at least 35 parts by weight, particularly 35-60 parts by weight.
  • the composition having the above moisture content is molded into beads
  • 4 parts by weight or less of a clay binder is added to 100 parts by weight of the solid content of the molded body (excluding moisture), and rolling sizing is performed. By doing so, the strength and wear resistance are improved.
  • Molding and sizing in the present invention are not particularly limited as long as a bead-shaped molded body can be molded, and any of a general rolling granulator, drum granulator, and rotary cylindrical granulator can be used. it can.
  • a zeolite bead molded body containing a clay binder improves the abrasion resistance to some extent by making the particle size smooth by regulating the particle size.
  • the conventional sizing is an effect of removing foreign substances adhering to the surface of the molded body and smoothing the surface, and the effect is only limited.
  • the amount of the clay binder added at the time of rolling sizing is 4 parts by weight with respect to 100 parts by weight of the solid weight of the compact (solid weight of zeolite and clay binder at the time of rolling granulation, excluding moisture).
  • the amount is preferably not more than parts by weight, particularly in the range of 0.01 to 3 parts by weight, more preferably 0.1 to 3 parts by weight.
  • the amount of water at the time of rolling sizing is 35 parts by weight or more with respect to 100 parts by weight of the solid weight of the molded body (excluding moisture. Total amount of zeolite and clay binder. Including clay binder added at the time of rolling sizing) In particular, the range of 35 to 45 parts by weight is preferable.
  • the amount of water When adding a clay binder during rolling sizing, it is preferable to adjust the amount of water by adding water together with the clay binder.
  • the water added together with the clay binder at the time of rolling sizing has an effect of making the added clay binder easily form a protective layer on the surface of the molded body.
  • the clay binder used in the present invention it is preferable that the clay binder used for molding and the clay binder added during sizing are the same type of clay binder. By using the same clay binder, a molded product having particularly high wear resistance can be obtained by adding a small amount of clay binder.
  • the clay binder used in the present invention is not particularly limited, but kaolin-based, bentonite-based, talc-based, virophilite-based, molycsite-based, verculolite-based, montmorillonite-based, chlorite-based, halloysite-based clay, etc.
  • kaolin clay which is a plate-like crystal is preferable.
  • the amount of the clay binder added to the zeolite is 10 to 50 parts by weight, particularly more than 40 parts by weight and 50 parts by weight or less with respect to 100 parts by weight (excluding moisture) of the zeolite in the finally obtained molded body. preferable. When the amount of the binder is too small, the strength is insufficient, and when it is too large, the performance as a desiccant per unit weight is lowered.
  • the clay binder added at the time of rolling sizing is 4% by weight or less of the molded body weight (excluding moisture) at the time of granulation, and the clay binder in the finally obtained molded body is 100 parts by weight of zeolite. It is preferably 40 parts by weight or more and 44 parts by weight or less.
  • the zeolite used in the present invention is not particularly limited, but when used as a desiccant for an air conditioner for automobiles, it is a K ion exchange type A zeolite (3A type zeolite) that does not adsorb chlorofluorocarbon and selectively adsorbs only moisture. It is preferable.
  • 3A-type zeolite powder is obtained by a known method, that is, sodium A-type zeolite powder synthesized from sodium aluminate and sodium silicate is exchanged with potassium ions in potassium chloride aqueous solution, and 35% or more of sodium ions in the zeolite are exchanged with potassium ions.
  • the 3A-type zeolite powder having an effective pore diameter of 3 angstroms can be obtained.
  • the particle size of the zelite crystal used in the present invention is preferably 5 ⁇ m or less, particularly 3 to 4 ⁇ m. When the particle size of the zeolite crystal is too large, the wear resistance tends to be lowered.
  • the sizing time in the present invention is not limited, but since a sufficient effect cannot be obtained in a short time, it is preferable to treat at least 10 minutes or more, particularly 60 minutes or more.
  • a dispersant and a molding aid may be included.
  • the conditions for drying and firing in the production method of the present invention are not particularly limited, but the zeolite is hydrothermally deteriorated by firing in a dry state with a high water content or firing at a high temperature. Performance decreases.
  • the moisture content at the time of drying is 10 to 32% in terms of ig-loss, particularly 10 to 25%, and the firing temperature is 600 to 800 ° C., particularly 600 to 700 ° C., and a method of firing for several hours to 10 hours can be exemplified. .
  • drying and activation methods known methods can be used.
  • a hot air dryer an electric muffle furnace, a tubular furnace, a rotary furnace, etc. may be used.
  • the zeolite crystal diameter is 5 ⁇ m or less
  • the clay binder is 10 parts by weight or more and 50 parts by weight or less, particularly more than 40 parts by weight and 50 parts by weight or less
  • the zeolite crystal diameter is preferably 5 ⁇ m or less, particularly 3 to 5 ⁇ m.
  • the zeolite crystal diameter can be confirmed by SEM observation. When the zeolite crystal diameter is larger than 5 ⁇ m, the wear resistance tends to be lowered.
  • the clay binder in the finally obtained zeolite bead molded body is 10 parts by weight or more and 50 parts by weight or less, especially 40 parts by weight or more and 50 parts by weight or less with respect to 100 parts by weight of zeolite (excluding moisture). It is preferable.
  • the clay binder used is a plate-like crystal, preferably having a crystal size comparable to or smaller than that of the zeolite particles. If the binder is less than 10 parts by weight, the strength and wear resistance are insufficient, and if it exceeds 50 parts by weight, the performance as a desiccant (adsorbent) decreases.
  • the particle size of the zeolite bead molded body is in the range of 1.0 to 3.0 mm, particularly preferably in the range of 1.4 to 2.5 mm.
  • the zeolite bead molded body obtained by the method of the present invention is not added (impregnated) with a conventional vitrifying agent such as sodium silicate, it has excellent toughness and does not block the pores of the molded body due to the vitrifying agent. Therefore, the adsorption performance is excellent. Whether or not it is a molded body to which a vitrifying agent such as sodium silicate is added can be confirmed by confirming the structure with an electron microscope.
  • the wear resistance is particularly preferably 1% or less.
  • the pressure strength and wear resistance of the present invention are both performances in a hydrated state (phase humidity 80%). In a dry (non-hydrated) state, even higher pressure strength and wear resistance are exhibited, but in practice, strength and wear are problematic in a state of advanced hydration. In the present invention, it is significant that the compressive strength and the wear resistance are high in a hydrated state.
  • the hydration pressure strength in the present invention is based on the crushing strength test method for a granulated product described in the granulated product-strength test method described in JIS-Z-8841 for a sample hydrated at a relative humidity of 80%. It is a measured value, and the abrasion resistance is measured by a weight reduction ratio by shaking for 1 hour with a general-purpose paint conditioner using 100 ml of a hydrated sample and 55 ml of an organic solvent (trichloroethylene) for testing. .
  • the zeolite bead molded body hydrated at 80% relative humidity is measured based on the granulated product crushing strength test method described in the granulated product-strength test method described in JIS-Z-8841.
  • a zeolite bead molded body having a diameter of 1.4 mm to 2.4 mm is used, and the pressure resistance in the diametrical direction is increased by a cylindrical shape with a diameter of 5 mm, using a Kiya digital hardness tester (KHT-20 type). Measured with a pressure plate. A pressure plate made of stainless steel was used, and 25 pressure-resistant strengths were measured.
  • Example 1 40 parts by weight of kaolin clay is mixed with 100 parts by weight of zeolite (K ion exchange A-type zeolite), and then 50 parts by weight of water is mixed with 100 parts by weight of zeolite and kaolin clay. Molded and sieved to obtain a 1.7 mm ⁇ preform.
  • the water content of the preform after molding (calculated as ig-loss when fired at 900 ° C.) was 36 parts by weight.
  • 3 parts by weight of kaolin clay with a different production area from that used for molding to the molded body is added to 100 parts by weight of the solid content of the preform, and the moisture content of the molded body is adjusted to 37 parts by weight with a sprayer. Rolled and sized for 70 minutes. Then, it dried and baked at 680 degreeC for 5 hours.
  • the characteristics of the obtained molded beads are shown in Table 1, and the cross section (surface) of the molded product after sizing is shown in FIG. Formation of a protective layer was confirmed on the surface of the molded body.
  • Example 2 The same treatment as in Example 1 was performed except that kaolin clay of the same production area was used for molding and rolling sizing, and the binder added during rolling sizing was 0.1 parts by weight.
  • the characteristics of the obtained bead molded body are shown in Table 1, and the cross section (surface) of the molded body after sizing is shown in FIG. Formation of a protective layer was confirmed on the surface of the molded body.
  • Example 3 43 parts by weight of kaolin clay is mixed with 100 parts by weight of zeolite (K ion exchange A-type zeolite), and then 55 parts by weight of water is mixed with 100 parts by weight of zeolite and kaolin clay. Molded and sieved to obtain a 1.7 mm ⁇ preform. The water content of the preform after molding (calculated as ig-loss when fired at 900 ° C.) was 38 parts by weight. 3 parts by weight of kaolin clay from the same production area as that used for molding is added to the molded body, and the water content of the molded body is adjusted to 39 parts by weight with a sprayer. Rolled and sized for a minute. Then, it dried and baked at 680 degreeC for 5 hours.
  • zeolite K ion exchange A-type zeolite
  • Table 1 shows the characteristics of the obtained molded beads.
  • Comparative Example 1 The same process as in Example 1 was performed without rolling and sizing the preformed body of Example 1.
  • the characteristics of the obtained molded beads are shown in Table 1, and the cross section (surface) of the molded article is shown in FIG. It was a molded product with many irregularities on the surface and insufficient hydration pressure strength and abrasion resistance.
  • Comparative Example 2 The same treatment as in Example 1 was performed except that 7 parts by weight of the clay binder added at the time of rolling sizing was used.
  • Table 1 shows the characteristics of the obtained molded beads. Since the clay binder added during sizing was large, the strength was improved, but the molded product had a large wear rate. The formation of a protective layer formed during sizing was observed on the surface of the molded body, but it was a thick layer of a binder alone, and the difference in structure from the inside of the molded body was remarkable.
  • Comparative Example 3 The same treatment as in Example 1 was performed except that 5 parts by weight of the clay binder added at the time of rolling sizing was used.
  • the present invention relates to a zeolite bead molded body having high strength and particularly high wear resistance, and a method for producing the same.
  • it can be used as a chlorofluorocarbon desiccant for automobile air conditioners that require high strength and wear resistance. Therefore, the industrial value of the present invention is remarkable.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

Un moulage constitué de billes formées à partir de zéolite et d’un liant argileux par oscillation/granulation est problématique en ce que la robustesse et la résistance à l’abrasion sont faibles. L’invention concerne un moulage constitué de billes de zéolite de diamètre moyen compris entre 1,0 et 3,0 mm et présentant une résistance à la pression d’hydratation égale ou supérieure à 35 N (en particulier égale ou supérieure à 70 N) et un facteur de résistance à l’abrasion inférieur ou égal à 1,5%. Une composition d’au moins 35 parts en poids d’eau pour 100 parts en poids de zéolite et de liant argileux combinés est moulée sous forme de billes par oscillation/granulation, puis 4 parts en poids ou moins de liant argileux sont ajoutées pour 100 parts en poids du moulage (à l’exclusion de la teneur en eau), puis le produit est soumis à une oscillation/granulation, puis séché et cuit. Les cristaux de zéolite utilisés, de préférence, sont de 5 µm ou plus petits ; on utilise entre 10 et 50 parts en poids de liant argileux, le même type de liant d’argile étant utilisé pour le moulage et la granulométrie.
PCT/JP2009/068288 2008-10-30 2009-10-23 Moulage de billes de zéolite à résistance élevée et procédé de production desdites billes de zéolite WO2010050417A1 (fr)

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JP2009199873A JP5747435B2 (ja) 2008-10-30 2009-08-31 高強度ゼオライトビーズ成型体及びその製造方法
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CN103071470A (zh) * 2011-10-25 2013-05-01 中国石油化工股份有限公司 一种吸附剂成球的方法
CN109987894A (zh) * 2019-05-06 2019-07-09 土上（北京）建筑设计咨询有限公司 夯土建筑土料及评价夯土建筑土料的方法

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CN103071472A (zh) * 2011-10-25 2013-05-01 中国石油化工股份有限公司 一种闪蒸干燥分子筛成球的方法
CN107694476B (zh) * 2017-07-25 2020-07-10 江苏远鸿新材料科技有限公司 一种高强度球型干燥剂的成型制造方法

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Publication number Priority date Publication date Assignee Title
CN103071470A (zh) * 2011-10-25 2013-05-01 中国石油化工股份有限公司 一种吸附剂成球的方法
CN103071470B (zh) * 2011-10-25 2015-03-25 中国石油化工股份有限公司 一种吸附剂成球的方法
CN109987894A (zh) * 2019-05-06 2019-07-09 土上（北京）建筑设计咨询有限公司 夯土建筑土料及评价夯土建筑土料的方法

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CN102177093B (zh) 2013-07-31
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