JPS5944891B2 - moisture desiccant - Google Patents
moisture desiccantInfo
- Publication number
- JPS5944891B2 JPS5944891B2 JP54004814A JP481479A JPS5944891B2 JP S5944891 B2 JPS5944891 B2 JP S5944891B2 JP 54004814 A JP54004814 A JP 54004814A JP 481479 A JP481479 A JP 481479A JP S5944891 B2 JPS5944891 B2 JP S5944891B2
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- fired
- desiccant
- water
- calcium
- 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
Links
Landscapes
- Drying Of Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【発明の詳細な説明】 本発明は新規な水分乾燥剤に関するものである。[Detailed description of the invention] The present invention relates to a novel moisture desiccant.
従来の水分乾燥剤は次の２群に分類し得られる。Conventional moisture desiccants can be classified into the following two groups.
（１）例えばシリカゲル、硫酸銅、硝石灰、生石灰、無
水石膏、炭酸カルシウム等の如き水分を吸着して化学変
化を起こすもの、（２）例えば活性炭の如き多孔性で水
分を物理的に吸着するもので、化学的変化を起こさない
ものとがある。(1) Materials that adsorb moisture and cause chemical changes, such as silica gel, copper sulfate, nitric lime, quicklime, anhydrite, calcium carbonate, etc.; (2) Materials that physically adsorb moisture through porous materials such as activated carbon. Some substances do not cause chemical changes.
第１群のものは水分を吸着して潮解する性質の大きいも
の程乾燥効果は大きいが、潮解性のため取扱いが困難と
なり、または生石灰、消石灰の如く吸着した水と作用し
て有害な物質となるなどの欠点がある。Among those in the first group, those that have a greater ability to absorb water and deliquesce have a greater drying effect, but their deliquescent nature makes them difficult to handle, or they interact with adsorbed water, such as quicklime and slaked lime, causing harmful substances. There are drawbacks such as:
これに対し第２群のものは潮解性がないため取扱いが容
易であり、化学変化を起こさないので安全である。On the other hand, those in the second group are easy to handle because they do not have deliquescent properties, and are safe because they do not cause chemical changes.
また多孔度を変化させることにより、その比重および水
分吸着性能を変化し得られ、比重の軽い水分乾燥剤が得
られる等の優れた特性を有する。In addition, by changing the porosity, the specific gravity and moisture adsorption performance can be changed, and it has excellent properties such as being able to obtain a moisture desiccant with a light specific gravity.
しかしながら、活性炭は多孔性にするための技術が難し
いばかりでなく価格も高価である問題点がある。However, activated carbon has problems in that the technology to make it porous is not only difficult but also expensive.
本発明は第２群に属する水分乾燥剤における前記問題点
を解決すべくなされたもので、その目的は多孔質で比重
を容易に変化し得る安価な水分乾燥剤を提供するにある
。The present invention was made to solve the above-mentioned problems in the moisture desiccant belonging to the second group, and its purpose is to provide an inexpensive moisture desiccant that is porous and whose specific gravity can be easily changed.
また他の目的は成形が容易で且つ高強度の多孔質で取扱
いが容易な水分乾燥剤を提供するにある。Another object of the present invention is to provide a moisture desiccant that is easy to mold, has high strength, is porous, and is easy to handle.
本発明者らは前記目的を達成すべく鋭意研究の結果、水
酸化アルミニウムに水不容性カルシウム°塩をモル比で
３：１〜に３の割合で混合して、該混合物を成形または
成形することなく、１００〜３００℃で焼成すると、高
強度の優れた吸水性を有する水分乾燥剤が得られること
を知見し得た。As a result of intensive research to achieve the above object, the present inventors have found that aluminum hydroxide and water-insoluble calcium salt are mixed in a molar ratio of 3:1 to 3, and the mixture is molded or molded. It has been found that a moisture desiccant having high strength and excellent water absorption can be obtained by firing at 100 to 300° C. without any heat absorption.
水酸化アルミニウムに硫酸カルシウムをＡｌ：Ｃａ＝に
１の割合に混合したものを焼成温度を変化させて３時間
焼成した物の吸収水分率を示すと第１図の通りであった
。Figure 1 shows the absorbed moisture content of a mixture of aluminum hydroxide and calcium sulfate in a ratio of Al:Ca = 1, which was fired for 3 hours at varying firing temperatures.
なお、該図は焼成した物をテシケーター内で自然放冷さ
せた後湿度８０〜９０％の室内に設置して重量を測定し
、乾燥剤の重量に対して吸収した水分量を百分率で表わ
したものである。In addition, this figure shows the amount of water absorbed relative to the weight of the desiccant expressed as a percentage after the baked product was left to cool naturally in a tessicator, placed in a room with a humidity of 80 to 90%, and weighed. It is something.
曲線１は４００°Ｃで焼成した物、曲線２は３００℃で
焼成した物、曲線３は１００℃で焼成した物、曲線４は
２００℃で焼成した物、曲線５はシリカゲルの吸収水分
率を示す。Curve 1 is the product fired at 400°C, Curve 2 is the product fired at 300°C, Curve 3 is the product fired at 100°C, Curve 4 is the product fired at 200°C, and Curve 5 is the absorbed moisture content of silica gel. show.
該図から明らかなように１００°Ｃ〜３００℃に焼成し
た物は従来水分乾燥剤として最も優れたものとされてい
るシリカゲルの水分吸収率に匹適し、特に２００°Ｃで
焼成した物はシリカゲルより遥かに勝れた物となる。As is clear from the figure, products fired at 100°C to 300°C have a water absorption rate comparable to that of silica gel, which is considered to be the best moisture drying agent in the past. It will be much better.
１００℃以下の焼成では水；分を吸収し得なく、また３
００°Ｃを超えると次第に水分の吸収が低下してしまう
。When fired at temperatures below 100°C, water cannot be absorbed, and 3
When the temperature exceeds 00°C, moisture absorption gradually decreases.
水酸化アルミニウムに水不溶性のカルシウム塩を混合す
る割合は３：１〜１：３の割合が好ましい。The ratio of mixing water-insoluble calcium salt to aluminum hydroxide is preferably 3:1 to 1:3.
水不溶性のカルシウム塩の量の増加に伴い成形品の強度
は増加するが、単位量に対する水の吸収量は低下する。As the amount of water-insoluble calcium salt increases, the strength of the molded article increases, but the amount of water absorbed per unit amount decreases.
水不溶性のカルシウム塩としては、例えば硫酸カルシウ
ム、炭酸カルシウム、シュウ酸カルシウム、リン酸カル
シウム、フッ化カルシウムが挙げられる。Examples of water-insoluble calcium salts include calcium sulfate, calcium carbonate, calcium oxalate, calcium phosphate, and calcium fluoride.
これらは単独または混合物として使用し得られるばかり
でなく、これらは不純物を含有する物、例えば排煙脱硫
の石灰石膏法によって排出される不純物含有硫酸カルシ
ウムも使用することができる。Not only can these be used alone or as a mixture, but also impurity-containing products, such as impure calcium sulfate discharged by the lime-gypsum method of flue gas desulfurization, can be used.
成形は直径が３〜６ｍｒｔｔ程度の球形が好ましい。The molding is preferably spherical with a diameter of about 3 to 6 mrtt.
本発明の水分乾燥剤の再生は空気、好ましくは２００°
Ｃ前後に加熱した空気を吹き込むことによって容易に行
い得られる。The moisture desiccant of the present invention is regenerated in air, preferably at 200°
This can be easily achieved by blowing heated air around C.
以上のように、本発明の水分乾燥剤は水不溶性カルシウ
ムを混合したものであるので成形が容易で強い強度を持
っており、その取扱いは極めて容易である。As described above, since the moisture desiccant of the present invention is a mixture of water-insoluble calcium, it is easy to mold, has strong strength, and is extremely easy to handle.
しかも水の吸収能はシリカゲルよりも優れたものとなし
得、且つ静止状態あるいは流動状態のいずれにも使用す
ることができ、再生も簡単に行うことができる。Moreover, it has a water absorption capacity superior to that of silica gel, can be used in either a static state or a fluid state, and can be easily regenerated.
更にまた多孔性で比重が小さいので、これを設置する乾
燥設備も高強度の材料を必要とせず設備費も少なくてす
む等の優れた効果を有する。Furthermore, since it is porous and has a low specific gravity, the drying equipment in which it is installed does not require high-strength materials and has excellent effects such as reducing equipment costs.
また本発明の水分乾燥剤は空調フィルター等のマットに
付着又は重層させて使用することができ、この場合はろ
過と脱湿とを同時に行うことができる。Further, the moisture desiccant of the present invention can be used by being attached to or layered on a mat such as an air conditioning filter, and in this case, filtration and dehumidification can be performed simultaneously.
実施例 １
硫酸カルシウムと水酸化アルミニウムの混合物（Ａｌ：
Ｃａのモル比１：１）を直径５ｍｍの球形に成型した。Example 1 A mixture of calcium sulfate and aluminum hydroxide (Al:
Ca (mole ratio 1:1) was molded into a sphere with a diameter of 5 mm.
この球状物を２００℃で３時間焼成した。This spherical material was fired at 200° C. for 3 hours.
該焼成物は空間率３３係比重は０．７Ｆ！／ｒｒｔであ
った。The fired product has a void ratio of 33 and a specific gravity of 0.7F! /rrt.
得られた乾燥剤を湿度８０〜９０係の常温の室内に設置
した。The obtained desiccant was placed in a room at room temperature with a humidity of 80-90%.
経過時間毎に乾燥剤の重量に対し、吸収した水分量の百
分率を測定した結果は次の通りであった。The percentage of water absorbed relative to the weight of the desiccant was measured at each elapsed time, and the results were as follows.
時間Φ■ ２４６８１０１５ 加 ３０吸収水
分率（憎 ６・０８・８１０・０１０・５１１・１１１
・９１２．３１２・６time
・912.312.6
第１図は焼成温度と吸収水分率との関係図である。
ｉ：４００℃焼成のもの、２：３００°Ｃ焼成のもの、
３：１００°Ｃ焼成のもの、４：２００℃焼成のもの、
５ニジリカゲル。FIG. 1 is a diagram showing the relationship between firing temperature and absorbed moisture content. i: 400°C fired, 2: 300°C fired,
3: those fired at 100°C, 4: those fired at 200°C,
5 Nijiri Kagel.
Claims (1)
ル比で３二１〜１：３の割合で混合した物を１００〜３
００℃で焼成したものを主成分とするものからなる水分
乾燥剤。1 A mixture of aluminum hydroxide and water-insoluble calcium salt in a molar ratio of 321 to 1:3 is mixed with 100 to 3
A moisture desiccant whose main component is one fired at 00°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54004814A JPS5944891B2 (en) | 1979-01-22 | 1979-01-22 | moisture desiccant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54004814A JPS5944891B2 (en) | 1979-01-22 | 1979-01-22 | moisture desiccant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5597224A JPS5597224A (en) | 1980-07-24 |
| JPS5944891B2 true JPS5944891B2 (en) | 1984-11-01 |
Family
ID=11594203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54004814A Expired JPS5944891B2 (en) | 1979-01-22 | 1979-01-22 | moisture desiccant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5944891B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55104627A (en) * | 1979-02-06 | 1980-08-11 | Mitsubishi Mining & Cement Co Ltd | Preparation of drying agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161484A (en) * | 1974-06-20 | 1975-12-27 |
-
1979
- 1979-01-22 JP JP54004814A patent/JPS5944891B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161484A (en) * | 1974-06-20 | 1975-12-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5597224A (en) | 1980-07-24 |
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