JP3312390B2 - Drying material manufacturing method - Google Patents
Drying material manufacturing methodInfo
- Publication number
- JP3312390B2 JP3312390B2 JP19947192A JP19947192A JP3312390B2 JP 3312390 B2 JP3312390 B2 JP 3312390B2 JP 19947192 A JP19947192 A JP 19947192A JP 19947192 A JP19947192 A JP 19947192A JP 3312390 B2 JP3312390 B2 JP 3312390B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- granules
- plate
- firing
- molded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は高吸着性能並びに高強度
を有する乾燥用資材、特に薬品、器具等の包装内充填用
の板状乾燥用資材およびその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drying material having high adsorption performance and high strength, and more particularly to a plate-like drying material for filling in the packaging of chemicals, utensils and the like, and a method for producing the same.
【０００２】[0002]
【従来の技術】外気からの接触を絶たれた密閉包装内の
乾燥剤としてはシリカゲル、塩化カルシウム、無水硫酸
カルシウム、活性アルミナ、ゼオライト或いはセルロー
ス等の高吸水性高分子等の成形体を紙、布、不織布、樹
脂シート等で包装あるいは被覆した物が使用されてお
り、就中、低湿度を得るためにはゼオライトが性能面よ
り多用されている。2. Description of the Related Art As a desiccant in a hermetically sealed package that has been kept from contact with the outside air, a molded article of a highly water-absorbing polymer such as silica gel, calcium chloride, anhydrous calcium sulfate, activated alumina, zeolite or cellulose is used as paper, A product wrapped or covered with a cloth, nonwoven fabric, resin sheet, or the like is used, and in particular, zeolite is used more frequently in view of performance in order to obtain low humidity.
【０００３】ゼオライト粉末は単独では成形が困難であ
り，一般には各種の結合剤が使用される。例えば，特公
昭33-9872 号にはベントナイト等の粘土鉱物を添加し水
と混錬後押出成形すること、特公昭38-18824号にはアル
カリ珪酸塩を添加すること、特公昭42-90 号には金属を
添加し焼結せしめること、特開昭49-67895号および特開
昭50-141593 号にはゼオライト粉末１００重量部に対し
３０〜９５重量部の活性アルミナを添加することが提案
されている。[0003] It is difficult to form zeolite powder by itself, and various binders are generally used. For example, add clay minerals such as bentonite to JP-B-33-9872, knead with water and extrude it. Add JP-B-38-18824 to add an alkali silicate. It is proposed to add a metal to the mixture and to sinter it, and Japanese Patent Application Laid-Open Nos. 49-67895 and 50-141593 propose to add 30 to 95 parts by weight of activated alumina to 100 parts by weight of zeolite powder. ing.
【０００４】これらの技術は転動造粒あるいは押出成形
によりペレットを成形する場合に適用できる。このよう
にして得たペレットを透湿性の材料で包装し乾燥用資材
とすることは公知である。一方、包装用小箱等に使用す
る乾燥用資材としては充填スペースの関係から板状が好
まれる。粘土鉱物質を結合剤として使用し板状または柱
状の成形体が製造可能であることが特開昭50-40494号、
特開昭55-104913 号、特開昭61-155216 号、特開平2-29
0220号に開示されている。形態を限定しないが再水和性
アルミナとゼオライトを含有する物質の押出成形法が特
開昭55-162342号に開示されている。[0004] These techniques can be applied when pellets are formed by rolling granulation or extrusion. It is known that the pellets thus obtained are wrapped with a moisture-permeable material and used as a drying material. On the other hand, a plate-like material is preferred as a drying material used for a small packaging box or the like in view of a filling space. JP-A-50-40494 discloses that a plate-like or columnar molded body can be produced using a clay mineral as a binder.
JP-A-55-104913, JP-A-61-155216, JP-A-2-29
No. 0220. JP-A-55-162342 discloses a method for extruding a material containing, but not limited to, rehydratable alumina and zeolite.
【０００５】[0005]
【発明が解決しようとする課題】しかし、粘土鉱物を結
合剤として使用した場合，粘土鉱物はわずかな吸着能し
か持たないので高吸着性能が要求される乾燥用資材とし
ては十分でない。また成形後ゼオライト化する方法は吸
着性能はすぐれているが、製法が複雑であり、板状成形
体を得るのには適していない。However, when a clay mineral is used as a binder, the clay mineral has only a small adsorptive capacity, so that it is not sufficient as a drying material requiring a high adsorptivity. The method of forming zeolite after molding has excellent adsorption performance, but the production method is complicated and is not suitable for obtaining a plate-like molded body.
【０００６】板状成形体の製法に於いて再水和性アルミ
ナを結合剤とする場合には再水和性アルミナ自体が吸着
性能を持つので好都合であるが、従来公知の方法には下
記のような欠点がある。 １）ゼオライト粉末と再水和性アルミナ粉末を単に混合
したものは成形性が悪く保形性を有する高強度の板状成
形体が得られない。 ２）転動造粒法では板状品の成形は不可能である。 ３）押出成形により幅に較べ厚さが薄い板状品を成形す
る場合にはそり，ねじれ等の形状変化がおき好ましくな
い。 ４）ゼオライト粉末と再水和性アルミナを混合し顆粒化
後に乾燥して圧縮成形し、次いで焼成する場合には焼成
時にクラックが発生し、歩留まりが悪く生産性が低下す
る。 かかる事情下に鑑み、本発明者等は吸着能に優れ、クラ
ック等が少なく、保形性に優れた板状乾燥剤を得るべく
鋭意研究を重ねた結果、本発明を完成するに至った。[0006] It is convenient to use rehydratable alumina as a binder in the method of producing a plate-like molded product, because the rehydratable alumina itself has an adsorption performance. There are such disadvantages. 1) When the zeolite powder and the rehydratable alumina powder are simply mixed, a high-strength plate-like molded body having poor shapeability and shape retention cannot be obtained. 2) It is impossible to form a plate-like product by the tumbling granulation method. 3) When a plate-like product having a thickness smaller than the width is formed by extrusion molding, shape changes such as warpage and twisting occur, which is not preferable. 4) When zeolite powder and rehydratable alumina are mixed, granulated, dried, compression-molded, and then calcined, cracks occur at the time of calcining, resulting in poor yield and low productivity. In view of such circumstances, the present inventors have conducted intensive studies to obtain a plate-shaped desiccant having excellent adsorption ability, few cracks and the like, and excellent shape retention. As a result, the present invention has been completed.
【０００７】[0007]
【課題を解決するための手段】すなわち、本発明はゼオ
ライト粉末を圧縮成形し焼成して得た成形体を透湿性の
シートで被覆してなる乾燥用資材を得る方法において、
ゼオライト粉末１００重量部に対して再水和性アルミナ
１〜３０重量部を添加し顆粒化した後、２００〜６００
℃で焼成し、次いで圧縮成形した後、該成形体を２００
〜６００℃で焼成することを特徴とする乾燥用資材の製
造方法を提供するにある。That is, the present invention relates to a method for obtaining a drying material obtained by covering a molded body obtained by compression molding and baking zeolite powder with a moisture-permeable sheet.
After adding 1 to 30 parts by weight of rehydratable alumina to 100 parts by weight of zeolite powder and granulating,
C. and then compression-molded.
It is an object of the present invention to provide a method for producing a drying material, which is characterized by baking at a temperature of up to 600 ° C.
【０００８】以下、本発明を詳細に説明する。本発明に
使用する主要原料はゼオライト粉末と再水和性アルミナ
粉末である。ゼオライト粉末としては吸湿能に優れたも
のであれば特に制限されないが、通常中心粒径約１〜２
０μｍのNa,Ca,K 等各種のカチオンイオンを有するＡ型
ゼオライト、就中、市販品として最も入手の容易な４Ａ
型ゼオライトが使用される。Hereinafter, the present invention will be described in detail. The main raw materials used in the present invention are zeolite powder and rehydratable alumina powder. The zeolite powder is not particularly limited as long as it has excellent hygroscopicity.
A-type zeolite having various kinds of cations such as Na, Ca, K of 0 μm, 4A which is most easily available as a commercial product
Type zeolites are used.
【０００９】本発明に於ける再水和性アルミナとは、ア
ルミナ水和物を熱分解したαアルミナ以外の遷移アルミ
ナ例えばγ、δ、ζ、η、θ、κ、ρ−アルミナ及び無
定形アルミナ等、工業的には例えばバイヤー工程から得
られるアルミナ三水和物等のアルミナ水和物を約４００
〜１２００℃の熱ガス気流中に通常、数分の１〜１０秒
接触させることにより得ることができる約０．５〜１５
重量％の灼熱減量を有する再水和可能なアルミナであ
る。The rehydratable alumina in the present invention is a transition alumina other than α-alumina obtained by thermally decomposing alumina hydrate, such as γ, δ, ζ, η, θ, κ, ρ-alumina and amorphous alumina Industrially, for example, alumina hydrate such as alumina trihydrate obtained from the Bayer process
Usually, about 0.5 to 15 which can be obtained by contacting in a hot gas stream at
It is a rehydratable alumina with a loss on ignition of% by weight.
【００１０】ゼオライト粉末に対する再水和性アルミナ
の添加量は、ゼオライト粉末１００重量部に対し、１〜
３０重量部が適当である。再水和性アルミナの添加量が
上記範囲より少ないと得られる顆粒の強度が弱く成形ま
での取扱に耐えられない。他方３０重量部を越える場合
には強度が大きくなりすぎ圧縮成形時の崩壊性が低下
し，成形体の形状や強度に好ましくない影響が出て来
る。The amount of the rehydratable alumina added to the zeolite powder is 1 to 100 parts by weight of the zeolite powder.
30 parts by weight are suitable. If the amount of the rehydratable alumina is less than the above range, the strength of the obtained granules is too low to withstand handling up to molding. On the other hand, when the amount exceeds 30 parts by weight, the strength becomes too large, the disintegration during compression molding is reduced, and the shape and strength of the molded product are adversely affected.
【００１１】ＰＶＡ，メチルセルロース等の有機バイン
ダーあるいはポリアクリル酸等の有機分散剤は焼成時に
消失するので単独では板状成形後の結合剤としては役に
立たないが、顆粒の強度を改良するため、或いは板状成
形体に細孔を付与するため、再水和性アルミナと併用し
て用いることは可能である。さらに吸着性能、強度を低
下させない範囲で水酸化アルミニウム、シリカゾル、珪
酸ナトリウム、粘土鉱物質等を添加することも可能であ
る。Organic binders such as PVA and methylcellulose and organic dispersants such as polyacrylic acid disappear during baking, so they are not useful alone as a binder after plate-shaped molding, but they are used to improve the strength of granules or It can be used in combination with rehydratable alumina to impart pores to the shaped body. It is also possible to add aluminum hydroxide, silica sol, sodium silicate, clay minerals and the like within a range that does not lower the adsorption performance and strength.
【００１２】本発明に於いて、ゼオライト粉末および再
水和性アルミナよりなる成形原料は圧縮成形に際し、予
め顆粒状に成形することを必須とする。顆粒化に際し、
再水和性アルミナ及び必要に応じて用いる他の添加物は
単にゼオライト粉末と乾式あるいは湿式混合して、また
は混合後乾式粉砕して、あるいは混合後湿式粉砕して顆
粒原料として使用する。混合物の中心粒径は約１〜２０
μｍが適当であり、この範囲にするため粉砕することは
顆粒の強度を向上させるのに効果がある。つぎの顆粒化
工程が転動造粒等乾式でされる場合は、本工程の混合あ
るいは粉砕も乾式で行なうのが経済的である。In the present invention, it is essential that the forming raw material comprising the zeolite powder and the rehydratable alumina be previously formed into granules at the time of compression molding. Upon granulation,
The re-hydratable alumina and other additives used as required are simply dry- or wet-mixed with the zeolite powder, or dry-pulverized after mixing, or wet-pulverized after mixing, and used as a raw material for granules. The central particle size of the mixture is about 1-20.
μm is appropriate, and pulverization in this range is effective in improving the strength of the granules. When the next granulation step is performed by a dry method such as tumbling granulation, it is economical to perform the mixing or pulverization in this step also by a dry method.
【００１３】原料粉末の顆粒化は金型への順調な流入、
成形体のクラック発生防止の効果を有する。顆粒化の方
法としては転動造粒、流動造粒、スプレー造粒等、ほぼ
球形の形状の物が得られる公知の方法が採用できる。転
動造粒法は生産性が高いという長所がある。顆粒の粒径
としては流動性の点から、板状成形体の厚さにもよるが
２０〜２０００μm が好ましく、必要なら篩別される。
とくに、微粒部分を除いておくことは金型への流入性の
点で重要である。つぎに顆粒は、再水和のために水蒸気
雰囲気下、約２０〜１５０℃で約１時間以上、通常約３
時間〜約２４時間熟成される。この時点で顆粒は５０〜
１００重量％の水分を含みそのうち約２０〜３０重量％
はゼオライトおよび再水和性アルミナに結合した結晶水
である。[0013] Granulation of the raw material powder is carried out smoothly into the mold,
It has the effect of preventing cracks in the molded article. As a method for granulation, a known method such as tumbling granulation, fluidized granulation, and spray granulation, which can obtain a substantially spherical product, can be employed. Rolling granulation has the advantage of high productivity. The particle size of the granules is preferably from 20 to 2000 μm, depending on the thickness of the plate-like molded product, from the viewpoint of fluidity, and is sieved if necessary.
In particular, it is important to remove the fine particles from the viewpoint of inflow into the mold. The granules are then rehydrated in a steam atmosphere at about 20-150 ° C. for about 1 hour or more, usually about 3 hours.
Aged for about 24 hours to about 24 hours. At this point the granules are 50-
Contains 100% by weight of water, of which about 20-30% by weight
Is water of crystallization bound to zeolite and rehydratable alumina.
【００１４】再水和処理後の顆粒は１００〜１５０℃で
乾燥すると、表面は乾いた状態になり圧縮成形金型への
流入は何等問題無いし、成形も十分可能である。ところ
がこのような処理をした顆粒を用いて得た成形体はつづ
く焼成工程でクラックが発生し使用できない。クラック
発生を防止するためには、顆粒を通常の乾燥処理するの
みでは満足な結果が得られず、成形前に２００〜６００
℃で焼成処理する必要がある。この処理後の水分は通常
１０重量％以下になる。焼成に必要な時間は条件による
が、通常約０．１〜１０時間である。顆粒の焼成温度が
２００℃未満では結晶水が脱離せず、クラック発生は防
止できない。他方、顆粒の焼成温度が６００℃を越えた
場合はゼオライトの吸着性能が低下するので好ましくな
い。When the granules after the rehydration treatment are dried at 100 to 150 ° C., the surface is in a dry state, there is no problem of flowing into the compression mold, and molding is sufficiently possible. However, a molded article obtained by using the granules thus treated cannot be used because cracks occur in the subsequent firing step. In order to prevent the occurrence of cracks, satisfactory results cannot be obtained only by subjecting the granules to ordinary drying treatment.
It is necessary to perform a baking treatment at ℃. The water content after this treatment is usually 10% by weight or less. The time required for firing depends on the conditions, but is usually about 0.1 to 10 hours. If the sintering temperature of the granules is lower than 200 ° C., water of crystallization will not be eliminated, and cracks cannot be prevented. On the other hand, when the firing temperature of the granules exceeds 600 ° C., the adsorption performance of zeolite is undesirably reduced.
【００１５】焼成を行った後の主としてゼオライト粉末
と再水和性アルミナよりなる原料顆粒は次いで所望形状
の板状成形体に圧縮成形により行う。圧縮成形は公知の
片押しあるいは両押しの金型プレス方法で行われる。成
形圧は所望とする成形体の形状にもよるが、通常縦１ｃ
ｍ〜１０ｃｍ，横１ｃｍ〜１０ｃｍ、厚さ３ｍｍ〜１ｃ
ｍの板状品の場合には約０．５ｔｏｎ／ｃｍ2 〜約２ｔ
ｏｎ／ｃｍ2 程度であればよい。After firing, the raw material granules mainly composed of zeolite powder and rehydratable alumina are then subjected to compression molding into a plate-like molded body having a desired shape. The compression molding is performed by a known one-press or double-press die pressing method. The molding pressure depends on the desired shape of the molded body, but is usually 1
m-10cm, width 1cm-10cm, thickness 3mm-1c
about 0.5 ton / cm 2 to about 2 ton
On / cm 2 may be sufficient.
【００１６】圧縮成形の過程で再水和性アルミナの水硬
結合は部分的には破壊されるが、ミクロ的には残存して
おり、これが成形後の成形体を崩壊することなく取扱い
し得る強度を付与する。この再水和性アルミナの水硬結
合は熟成工程で１００℃付近という低温で現れるもので
あり、粘土鉱物の結合が焼結温度に近い所で現れるのに
較べ有利である。圧縮成形に際し、ステアリン酸、ステ
アリン酸塩、グラファイト等の離型剤を添加することは
可能である。In the process of compression molding, the hydraulic bond of the rehydratable alumina is partially broken, but remains microscopically, and the molded body after molding can be handled without collapsing. Gives strength. The hydraulic bond of the rehydratable alumina appears at a low temperature of around 100 ° C. in the aging step, which is more advantageous than the bond of the clay mineral appearing near the sintering temperature. At the time of compression molding, it is possible to add a release agent such as stearic acid, stearic acid salt, and graphite.
【００１７】本発明に於いて圧縮成形により得られた成
形体は、次いで焼成される。成形体原料は顆粒成形後の
焼成によりすでに活性化されているのであるが、この成
形後の焼成工程は必須である。この工程を省略する場合
には成形体を保管しているときに割れが多数発生する。
この工程の焼成条件は温度２００〜６００℃、焼成時間
は通常、０．１〜１０時間である。ゼオライトの吸着性
を最大にするためには、原料顆粒の焼成あるいは板状成
形体の焼成のいずれかを４００〜６００℃の範囲にする
のが好ましい。The compact obtained by compression molding in the present invention is then fired. Although the raw material of the compact has already been activated by baking after granulation, the baking step after this molding is essential. If this step is omitted, many cracks occur during storage of the compact.
The firing conditions in this step are a temperature of 200 to 600 ° C., and the firing time is usually 0.1 to 10 hours. In order to maximize the adsorptivity of the zeolite, it is preferable that either the firing of the raw material granules or the firing of the plate-like molded product be in the range of 400 to 600 ° C.
【００１８】このようにして得られた板状成形体は焼成
後、包装を行う。包装用材料としては紙、布、不織布、
樹脂シート等公知の材質の物が使用できる。板状成形体
の包装方法は特に制限されないが袋への封入、挟み込
み、あるいは包装用材料で成形体を被覆する方法等が挙
げられる。これら包装用の材料は透湿性なので、これを
さらに密閉容器に保管することが必要である。The thus obtained plate-like molded body is packaged after firing. Paper, cloth, non-woven fabric,
A known material such as a resin sheet can be used. The method of packaging the plate-like molded body is not particularly limited, and examples thereof include a method of enclosing in a bag, sandwiching, or covering the molded body with a packaging material. Since these packaging materials are moisture permeable, it is necessary to further store them in a closed container.
【００１９】[0019]
【発明の効果】以上詳述したごとく、本発明はゼオライ
ト粉末と再水和性アルミナよりなる板状乾燥用資材を得
るに当り、顆粒成形後及び圧縮成形後の成形体のいずれ
をも特定焼成条件で焼成することにより、吸着能に優
れ、且つ成形体のクラック等が少なく、保形性に優れた
板状乾燥用資材を得ることを可能としたもので、その産
業的価値は頗る大である。As described above in detail, in the present invention, in obtaining a plate-like drying material composed of zeolite powder and rehydratable alumina, both of the compact after granulation and compression molding are subjected to specific firing. By firing under the conditions, it is possible to obtain a plate-shaped drying material with excellent adsorption capacity, less cracks in the molded body, and excellent shape retention, and its industrial value is very large. is there.
【００２０】[0020]
【実施例】以下、本発明を実施例を用いて、さらに詳細
に説明するが、本発明はかかる実施例によりその範囲を
制限されるものではない。尚、実施例に於いて”部”は
特に断りのない限り”重量部”を表す。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the scope of the present invention is not limited by these examples. In the examples, "parts" means "parts by weight" unless otherwise specified.
【００２１】実施例１ 市販の中心粒径３μの４Ａ型ゼオライト粉末１００部
と、中心粒径１２μの再水和性アルミナ（活性アルミナ
ＢＫ−１１２，住友化学工業株式会社製）８部を混合し
振動ミルにて粉砕した混合粉体を、水をスプレーしなが
ら転動造粒機で約０．７ｍｍに造粒し、１４〜４８メッ
シュの範囲を篩別し該範囲の顆粒を得た。次いでこの顆
粒を約８０℃の水蒸気雰囲気中に１６時間密閉しアルミ
ナを再水和させ、４７５℃で焼成した。このようにして
調製した顆粒を１０００ｋｇ／ｃｍ 2 で３０×３０×４
ｍｍに油圧プレス機で成形し、得られた成形体５個を高
温乾燥機にて１００℃／ｈｒで昇温し４００℃焼成し
た。成形体の焼成時のクラック発生はなかった。乾燥機
より取り出し冷却後，吸湿しないようにポリプロ製不織
布（株式会社クラレ製）に包装した。１週間保管後観察
したが割れはまったく見られなかった。製品の密度は
０．９９ｇ／ｃｍ3 で、相対湿度１％での平衡吸湿量は
乾燥剤１００ｇあたり１７ｇであった。Example 1 100 parts of commercially available 4A zeolite powder having a central particle size of 3 μm
And a rehydratable alumina having a center particle size of 12 μm (activated alumina
BK-112, manufactured by Sumitomo Chemical Co., Ltd.)
Spray the mixed powder pulverized by the vibration mill with water.
Granulate to about 0.7 mm with a tumbling granulator.
The sieved area was sieved to obtain granules in the area. Then this condyle
The particles are sealed in a steam atmosphere of about 80 ° C for 16 hours and
The na was rehydrated and calcined at 475 ° C. Like this
1000 kg / cm of prepared granules Two30 × 30 × 4
mm with a hydraulic press machine, and the obtained 5 compacts are
The temperature is raised at 100 ° C / hr with a hot dryer and baked at 400 ° C.
Was. No cracking occurred during firing of the compact. Dryer
After taking out and cooling, nonwoven fabric made of polypropylene to prevent moisture absorption
Wrapped in cloth (Kuraray Co., Ltd.). Observation after storage for one week
However, no cracks were seen. Product density
0.99 g / cmThreeThe equilibrium moisture absorption at 1% relative humidity is
It was 17 g per 100 g of the desiccant.
【００２２】実施例２ ゼオライト粉末１００部に再水和性アルミナ３０部を使
用した以外、実施例１と同様に操作し、板状成形体を得
た。焼成時のクラック発生はなかった。次いでこの成形
体を実施例１と同じポリプロピレン製不織布に包装し
た。製品の密度は１．０２ｇ／ｃｍ3 で、相対湿度１％
での平衡吸湿量は乾燥剤１００ｇあたり１５ｇであっ
た。Example 2 A plate-like molded product was obtained in the same manner as in Example 1, except that 30 parts of rehydratable alumina was used for 100 parts of zeolite powder. No cracking occurred during firing. Next, the molded body was packaged in the same polypropylene nonwoven fabric as in Example 1. Product density is 1.02g / cm 3 and relative humidity 1%
Was 15 g per 100 g of desiccant.
【００２３】実施例３ 顆粒の焼成温度を２５０℃とした以外、実施例１と同様
に板状成形体を得た。焼成時のクラック発生はなかっ
た。Example 3 A plate-like molded product was obtained in the same manner as in Example 1 except that the sintering temperature of the granules was 250 ° C. No cracking occurred during firing.
【００２４】比較例１ ゼオライト粉末１００部に再水和性アルミナ５０部を使
用した以外、実施例と同様に板状成形体を得た。成形体
の側壁の摩擦傷および四角の欠けが実施例と比較して顕
著に多かった。製品の密度は１．０４ｇ／ｃｍ3 で、相
対湿度１％での平衡吸湿量は乾燥剤１００ｇあたり１１
ｇであった。Comparative Example 1 A plate-like molded body was obtained in the same manner as in the Example, except that 50 parts of rehydratable alumina was used for 100 parts of the zeolite powder. Friction scratches and chipping of squares on the side wall of the molded product were significantly higher than those of the examples. The product has a density of 1.04 g / cm 3 and an equilibrium moisture absorption at 1% relative humidity of 11 per 100 g of desiccant.
g.
【００２５】比較例２ 実施例１のゼオライ粉末を再水和アルミナを用いず、直
接圧縮成形した。成形体は極めて脆いものであった。製
品の密度は０．９３ｇ／ｃｍ3 で、相対湿度１％での平
衡吸湿量は乾燥剤１００ｇあたり１７ｇであった。Comparative Example 2 The zeolite powder of Example 1 was directly compression molded without using rehydrated alumina. The compact was extremely brittle. The density of the product was 0.93 g / cm 3 and the equilibrium moisture absorption at a relative humidity of 1% was 17 g per 100 g of the desiccant.
【００２６】比較例３ 顆粒の焼成を行わず、代わりに１００℃で乾燥のみを行
った以外、実施例１と同様に板状成形体を得た。焼成時
に全体の２０％の成形体にクラックが発生した。クラッ
クの発生しなかった成形体については、製品の密度は
１．０４ｇ／ｃｍ 3 で、相対湿度１％での平衡吸湿量は
乾燥剤１００ｇあたり１７ｇであった。Comparative Example 3 The granules were not fired, but were instead dried only at 100 ° C.
Except for this, a plate-like molded body was obtained in the same manner as in Example 1. During firing
Cracks occurred in 20% of the molded articles. Crack
For compacts without cracks, the product density is
1.04 g / cm ThreeThe equilibrium moisture absorption at 1% relative humidity is
It was 17 g per 100 g of the desiccant.
【００２７】比較例４ 板状成形品の焼成を行わなかった以外は実施例１と同様
の方法で板状成形体を得た。成形体を焼成炉より取り出
し包装後、２日保管した後観察すると、用いた成形体試
料５個すべてに割れが発生していた。Comparative Example 4 A plate-like molded product was obtained in the same manner as in Example 1 except that the plate-like molded product was not fired. When the compact was taken out of the firing furnace, packed and stored for 2 days and observed, cracks were found in all five compact samples used.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B01D 53/26 - 53/28 B01J 20/18 B01J 20/28 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) B01D 53/26-53/28 B01J 20/18 B01J 20/28
Claims (1)
た成形体を透湿性のシートで被覆してなる乾燥用資材を
得る方法において、ゼオライト粉末１００重量部に対し
て再水和性アルミナ１〜３０重量部を添加し顆粒化した
後、２００〜６００℃で焼成し、次いで圧縮成形した
後、該成形体を２００〜６００℃で焼成することを特徴
とする乾燥用資材の製造方法。1. A method for obtaining a drying material obtained by covering a molded body obtained by compression-molding and firing a zeolite powder with a moisture-permeable sheet. A method for producing a drying material, characterized in that granules are added, granulated at ３０30 parts by weight, baked at 200-600 ° C., compression-molded, and then baked at 200-600 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19947192A JP3312390B2 (en) | 1992-07-27 | 1992-07-27 | Drying material manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19947192A JP3312390B2 (en) | 1992-07-27 | 1992-07-27 | Drying material manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0639235A JPH0639235A (en) | 1994-02-15 |
| JP3312390B2 true JP3312390B2 (en) | 2002-08-05 |
Family
ID=16408358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19947192A Expired - Fee Related JP3312390B2 (en) | 1992-07-27 | 1992-07-27 | Drying material manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3312390B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19959957A1 (en) * | 1999-12-13 | 2001-06-21 | Sued Chemie Ag | Platelet-shaped compacts |
| US7135127B2 (en) | 1999-12-13 | 2006-11-14 | Süd-Chemie AG | Laminated pressed articles |
| US20030015687A1 (en) | 2001-01-08 | 2003-01-23 | Sud-Chemie Ag | Plate-shaped pressed bodies |
| JP5031232B2 (en) * | 2005-12-14 | 2012-09-19 | パナソニック株式会社 | Vacuum heat insulating material and heat insulating box using vacuum heat insulating material |
-
1992
- 1992-07-27 JP JP19947192A patent/JP3312390B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0639235A (en) | 1994-02-15 |
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