JP3134330B2 - Air purifying agent and method for producing the same - Google Patents
Air purifying agent and method for producing the sameInfo
- Publication number
- JP3134330B2 JP3134330B2 JP03068411A JP6841191A JP3134330B2 JP 3134330 B2 JP3134330 B2 JP 3134330B2 JP 03068411 A JP03068411 A JP 03068411A JP 6841191 A JP6841191 A JP 6841191A JP 3134330 B2 JP3134330 B2 JP 3134330B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- temperature
- molded product
- impregnated
- grid
- 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
- Separation Of Gases By Adsorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は空気中のハロゲン化物や
硫酸等の酸性成分を除去する空気の浄化剤とその製造方
法に係り、特に活性炭にアルカリ成分を担持する際の強
度低下や割れの発生の少ない空気浄化剤及びその製造方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying agent for removing acidic components such as halides and sulfuric acid in air and a method for producing the same, and more particularly to a method for reducing strength and cracking when carrying an alkali component on activated carbon. The present invention relates to an air purifying agent that generates less and a method for producing the same.
【０００２】[0002]
【従来の技術】空気中のフッ化水素、塩化水素、二酸化
硫黄等の酸性ガスは、絵画等の美術品の退色、通信設
備、電子機器等の部品の腐食等の問題を起こす。さら
に、半導体の製造工程等では、クリーンルーム内におい
て洗浄やエッチング等でフッ化水素、塩化水素等を使用
している。従来、クリーンルームでは、このような薬品
等の漏れによる装置の損傷やＨＥＰＡフィルタの損傷を
防止するため、ガスを除去するガス吸収フィルタが設置
されている。2. Description of the Related Art Acid gases such as hydrogen fluoride, hydrogen chloride and sulfur dioxide in the air cause problems such as fading of artworks such as paintings and corrosion of components such as communication equipment and electronic equipment. Further, in a semiconductor manufacturing process or the like, hydrogen fluoride, hydrogen chloride, or the like is used in a clean room for cleaning or etching. Conventionally, in a clean room, a gas absorption filter for removing gas is installed in order to prevent damage to the apparatus and damage to the HEPA filter due to such leakage of chemicals and the like.
【０００３】すなわち、フッ化水素ガスはＨＥＰＡフィ
ルタに接触すると、フィルタを構成するガラス繊維を腐
食させ、ガラス内に含まれるボロン化合物の極微粒子を
放出する危険性があり、ボロン化合物はシリコン半導体
のウエハに付着し、ＬＳＬの性能や歩留りを悪くする。
このため、フッ化水素を効果的に除去するためのガス吸
収フィルタが必要となる。したがって、フッ化水素等の
酸性ガスを空気中から除去することが種々の分野で大き
な課題となっている。[0003] That is, when the hydrogen fluoride gas comes into contact with the HEPA filter, there is a danger of corroding the glass fibers constituting the filter and releasing ultra-fine particles of the boron compound contained in the glass. It adheres to the wafer and deteriorates the performance and yield of LSL.
Therefore, a gas absorption filter for effectively removing hydrogen fluoride is required. Therefore, removal of acidic gases such as hydrogen fluoride from the air has been a major issue in various fields.
【０００４】これらの空気中の酸性ガスを除去する方法
としては、ＫＭｎＯ4 とベントナイトとの混練成形物
（特公昭５２−１５２６６１号公報）や活性炭、さら
に、活性炭にＫＯＨを担持した浄化剤を用いることが知
られている。しかし、これらの浄化剤はいずれも円柱状
や活性炭の破砕物であり、通風時の圧力損失が高く、通
風動力が大きい欠点があった。As a method of removing these acid gases in the air, kneaded molding of KMnO 4 and bentonite (JP-B 52-152661 Patent Publication) and activated carbon, further use of the cleaning agent carrying a KOH activated carbon It is known. However, these purifying agents are all columnar or crushed activated carbon, and have the disadvantages of high pressure loss during ventilation and large ventilation power.
【０００５】このような欠点を解決するため、格子状構
造に成形した活性炭や、格子状構造の活性炭にＫＯＨ等
のアルカリを担持する方法が考えられている。アルカリ
成分を活性炭に担持する方法としては、活性炭をアルカ
リに溶解した液に浸漬後、水切りし、乾燥する方法が採
用されている。このような手段によって、低圧損で、空
気中の酸性ガスを効率良く除去できる。In order to solve such a drawback, there has been proposed an activated carbon formed into a lattice structure, or a method of supporting an alkali such as KOH on activated carbon having a lattice structure. As a method of supporting the alkali component on the activated carbon, a method of immersing the activated carbon in a solution in which the activated carbon is dissolved, then draining and drying the solution is adopted. By such means, the acidic gas in the air can be efficiently removed with low pressure loss.
【０００６】[0006]
【発明が解決しようとする課題】しかし、活性炭にＫＯ
Ｈを担持したものは脆くなり、特に格子状構造に成形さ
れた活性炭の場合には製造時にひび割れが生じたり、割
れてしまうなどの問題点があった。本発明の目的は、上
記した従来技術の課題を解決し、空気中のＨＦ、ＨＣ
ｌ、ＳＯ2 等の有害ガスの除去性能に優れ、かつ、活性
炭へのアルカリの担持の際に強度が低下しない空気の浄
化剤及びその製造方法を提供することにある。However, KO is used for activated carbon.
What carried H became brittle, and in particular, in the case of activated carbon formed into a lattice structure, there were problems such as cracking or cracking during production. An object of the present invention is to solve the above-mentioned problems of the prior art, and to solve HF and HC in air.
It is an object of the present invention to provide an air purifying agent which is excellent in the performance of removing harmful gases such as l, SO 2 and the like, and whose strength does not decrease when an alkali is carried on activated carbon, and a method for producing the same.
【０００７】[0007]
【課題を解決するための手段】本発明は前記目的を達成
するために、格子状活性炭成形物をカリウムの炭酸塩溶
液に浸漬した後、水切りし、乾燥温度が７０〜１００℃
の範囲から選んだ所定の最高温度になるまで徐々に昇温
し、前記最高温度で加熱乾燥させて、前記格子状活性炭
成形物にカリウムの炭酸塩を担持させたことを特徴とす
る。また、本発明は前記目的を達成するために、格子状
活性炭成形物をカリウムの炭酸塩溶液に浸漬した後、水
切りし、乾燥温度が７０〜１００℃の範囲から選んだ所
定の最高温度になるまで徐々に昇温すると共に、前記格
子状活性炭成形物の水分含有率が１０％以下になるまで
前記最高温度で加熱乾燥させることを特徴とする。According to the present invention, in order to achieve the above object, a grid-like activated carbon molded product is immersed in a potassium carbonate solution, drained, and dried at a temperature of 70 to 100 ° C.
The temperature gradually rises until it reaches the specified maximum temperature selected from the range
And drying by heating at the maximum temperature to support potassium carbonate on the lattice-shaped activated carbon molded product. In order to achieve the above object, the present invention provides a method in which a grid-like activated carbon molded product is immersed in a potassium carbonate solution, drained, and dried at a temperature selected from the range of 70 to 100 ° C.
Gradually raise the temperature until it reaches the specified maximum temperature.
Until the water content of the dendritic activated carbon molded product becomes 10% or less
It is characterized by drying by heating at the maximum temperature .
【０００８】本発明において、アルカリ金属の炭酸塩と
しては、特に、炭酸ナトリウム、炭酸カリウムが用いら
れるが、ナトリウム塩は溶解度（４９０ｇ／ｌ．ｓｏ
ｌ）が低いため高濃度に活性炭に担持できないのでカリ
ウム塩（９００ｇ／ｌ．ｓｏｌ）の方が好適である。ま
た、カリウムの炭酸塩としてはＫ2 ＣＯ3 、ＫＨＣＯ3
等が好適に用いられる。In the present invention, sodium carbonate and potassium carbonate are particularly used as the alkali metal carbonate, and the sodium salt has a solubility (490 g / l.so.).
Since l) is low and cannot be supported on activated carbon at a high concentration, potassium salt (900 g / l. sol) is more preferable. Further, potassium carbonates such as K 2 CO 3 and KHCO 3
Etc. are preferably used.
【０００９】活性炭を含浸液のＫ2 ＣＯ3 等の炭酸塩の
濃度は濃い方が高濃度に活性炭に担持できるが、あまり
濃度が濃いと粘性が高くなり活性炭の細孔に溶液が浸入
しないため、Ｋ2 ＣＯ3 等の炭酸塩の溶液の濃度は３０
０〜７００ｇ／ｌ．好ましくは４５０〜５００ｇ／ｌ．
が好適である。本発明において、活性炭としては椰子
殻、石炭などを不活性ガス雰囲気中で加熱し、炭化処理
を行ったものや、これを、さらに、水蒸気賦活して比表
面積を増加させたものが好適に用いられる。[0009] The higher the concentration of carbonate such as K 2 CO 3 in the impregnating liquid of activated carbon, the higher the concentration of carbonate can be supported on activated carbon. However, if the concentration is too high, the viscosity increases and the solution does not penetrate into the pores of the activated carbon. The concentration of a solution of a carbonate such as K 2 CO 3 is 30
0-700 g / l. Preferably 450-500 g / l.
Is preferred. In the present invention, as activated carbon, those obtained by heating a coconut shell, coal, or the like in an inert gas atmosphere and performing a carbonization treatment, and those obtained by further activating steam to increase the specific surface area are preferably used. Can be
【００１０】活性炭へのＫ2 ＣＯ3 等の炭酸塩の担持方
法としては、活性炭をＫ2 ＣＯ3 等の炭酸塩の溶液に浸
漬し後、水切りし、加熱乾燥する。この場合、活性炭は
水分の吸収によって膨張し、乾燥時に収縮するため、活
性炭の応力がかかり、ヒビ割れが生じる。そこで、活性
炭の急激な収縮を防止するため、活性炭の乾燥温度は徐
々に増加させることが望ましく、例えば、２０℃つづ２
時間おきに昇温し、活性炭各部の温度分布を均一にして
歪みを生じさせないように乾燥するのが好適である。特
に、空気浄化剤の水分含有率は、１０％以下にすること
が望ましい。この理由は、空気浄化剤中の水分量を多す
ぎると、水が空気浄化剤の細孔中に残留し、この細孔内
への酸性ガスの進入が妨害されるためである。したがっ
て、空気浄化剤の水分含有率を１０％以下とするために
は、最終的には乾燥温度を８０℃×２時間とすることが
望ましい。[0010] As the supporting method of the carbonates such as of K 2 CO 3 to activated carbon, after immersing the activated carbon in a solution of carbonate such as K 2 CO 3, drained, dried by heating. In this case, the activated carbon expands due to the absorption of moisture and contracts during drying, so that the stress of the activated carbon is applied and cracks occur. Therefore, in order to prevent sudden contraction of the activated carbon, it is desirable to gradually increase the drying temperature of the activated carbon.
It is preferable to raise the temperature every time and to make the temperature distribution of each part of the activated carbon uniform so as not to cause distortion. In particular, the water content of the air purifier is desirably 10% or less. The reason for this is that if the amount of water in the air purifying agent is too large, water remains in the pores of the air purifying agent, and the entry of acid gas into the pores is hindered. Therefore, in order to reduce the water content of the air purifier to 10% or less, it is desirable to finally set the drying temperature to 80 ° C. × 2 hours.
【００１１】[0011]
【作用】本発明によれば、カリウムの炭酸塩の溶液を格
子状活性炭成形物に担持した後、乾燥する際に発熱反応
が起こらず、活性炭の結合の破壊がなく、かつ、活性炭
の炭素の一部の燃焼することがなく強度低下を防止でき
る。本発明の空気浄化剤のこのような作用を図面に基づ
いて説明する。図１において（ａ）椰子殻活性炭を原料
とした破砕炭を水に含浸したもの、（ｂ）石炭を原料と
した破砕炭を水に含浸したもの、（ｃ）椰子殻活性炭を
原料とした格子状活性炭を水に含浸したもののそれぞれ
の示差熱測定結果を示している。According to the present invention, an exothermic reaction does not occur when drying after drying a potassium carbonate solution on a lattice-shaped activated carbon molded product, the bond of activated carbon is not broken, and the carbon content of activated carbon is reduced. The strength can be prevented from lowering without burning partly. Such an effect of the air purifying agent of the present invention will be described with reference to the drawings. In FIG. 1, (a) crushed charcoal made from coconut shell activated carbon as a raw material is impregnated in water, (b) crushed charcoal made from coal as a raw material is impregnated in water, and (c) a lattice made from coconut shell activated carbon is used as a raw material. FIG. 3 shows the results of differential heat measurement of each of the impregnated activated carbon impregnated with water.
【００１２】図２において、（ｄ）椰子殻活性炭を原料
とした破砕炭をＫＯＨ溶液に含浸したもの、（ｅ）石炭
を原料とした破砕炭をＫＯＨ溶液に含浸したもの、
（ｆ）椰子殻活性炭を原料とした格子状活性炭をＫＯＨ
溶液に含浸したもののそれぞれの示差熱測定結果を示し
ている。図３において、（ｇ）椰子殻活性炭を原料とし
た破砕炭をＮａＯＨ溶液に含浸したもの、（ｈ）石炭を
原料とした破砕炭をＫ2 ＣＯ3 溶液に含浸したもの、
（ｉ）椰子殻活性炭を原料とした格子状活性炭をＫＨＣ
Ｏ3 溶液に含浸したもののそれぞれの示差熱測定結果を
示している。In FIG. 2, (d) crushed charcoal made from coconut shell activated carbon as a raw material impregnated in a KOH solution, (e) crushed charcoal made from coal as a raw material impregnated in a KOH solution,
(F) KOH is used as a lattice activated carbon made from coconut shell activated carbon.
The results of differential heat measurement of each of the samples impregnated in the solution are shown. In FIG. 3, (g) crushed charcoal made from coconut shell activated carbon as a raw material impregnated in a NaOH solution, (h) crushed charcoal made from coal as a raw material impregnated in a K 2 CO 3 solution,
(I) KHC is a lattice activated carbon made from coconut shell activated carbon.
The results of differential heat measurement of each of the samples impregnated with the O 3 solution are shown.
【００１３】図１から、（ａ）〜（ｃ）のいずれも発熱
が認められず、したがって、活性炭のみに水を含浸した
場合には発熱反応が認められないことを示している。ま
た、図２から、椰子殻活性炭を原料とした格子状活性炭
をＫＯＨ溶液に含浸したもの（ｆ）では、８０℃付近よ
り発熱反応が始まり、１２０℃付近に発熱のピークが認
められる。さらに、図３から椰子殻活性炭を原料とした
破砕炭をＮａＯＨ溶液に含浸したもの（ｇ）は、１２０
℃付近で顕著に発熱する傾向が認められるが、石炭を原
料とした破砕炭をＫ2 ＣＯ3 溶液に含浸したもの（ｈ）
及び椰子殻活性炭を原料とした格子状活性炭をＫＨＣＯ
3溶液に含浸したもの（ｉ）は、いずれも発熱量は極め
て僅かである。FIG. 1 shows that no heat generation was observed in any of (a) to (c), and thus no exothermic reaction was observed when only activated carbon was impregnated with water. Further, from FIG. 2, in the case of impregnated lattice activated carbon made from coconut shell activated carbon into a KOH solution (f), an exothermic reaction starts at about 80 ° C., and an exothermic peak is observed at about 120 ° C. Further, FIG. 3 shows that the crushed charcoal made from coconut shell activated carbon as a raw material and impregnated with NaOH solution (g) was 120 g.
There is a tendency to remarkably generate heat around ℃, but crushed coal made from coal as a raw material impregnated with K 2 CO 3 solution (h)
And coconut shell activated carbon as a raw material, KHCO
(3) The solution (i) impregnated with the solution has a very small calorific value.
【００１４】このように、ＮａＯＨ、ＫＯＨ等のアルカ
リ金属の水酸化物を含浸させた活性炭は、乾燥時に活性
炭に含まれるＨ、Ｎ、Ｏ等の揮発分が水酸化物と反応し
て発熱、燃焼し、活性炭の結合が破壊され、さらに、こ
の燃焼により活性炭の炭素の一部も燃焼するものとみら
れる。しかし、本発明のようにカリウム等のアルカリ金
属の炭酸塩を含浸させた活性炭は、上記したような発熱
反応がなく、担持による活性炭の強度低下は起こらな
い。As described above, activated carbon impregnated with hydroxides of alkali metals such as NaOH, KOH, etc. generates volatile heat such as H, N, O, etc. contained in the activated carbon during drying, reacting with the hydroxide to generate heat. It is believed that the carbon is burned and the bond of the activated carbon is broken, and furthermore, part of the carbon of the activated carbon is also burned by the burning. However, activated carbon impregnated with a carbonate of an alkali metal such as potassium as in the present invention does not have the exothermic reaction described above, and does not cause a decrease in the strength of activated carbon due to loading.
【００１５】[0015]
【実施例】格子状に成形した活性炭をＫ2 ＣＯ3 ７規定
溶液に含浸した後、脱水、乾燥した。乾燥条件は、１０
〜２０℃づつ２時間毎に昇温し、最高温度７０℃、８０
℃、９０℃、１００℃で、それぞれ４時間乾燥した。最
高温度１００℃まで昇温した場合について、雰囲気温度
と活性炭内部の温度の経時変化を図４に示す。なお、活
性炭内部の温度は活性炭内部に熱電対を挿入して測定し
た。図４から明らかなように雰囲気温度と活性炭内部温
度はほぼ同等であり、したがって、活性炭の発熱は認め
られないことが判明した。EXAMPLE Activated carbon formed into a lattice shape was impregnated with a 7N solution of K 2 CO 3 , then dehydrated and dried. Drying condition is 10
The temperature is raised every 2 hours by ~ 20 ° C.
It dried at 4 degreeC, 90 degreeC, and 100 degreeC each for 4 hours. FIG. 4 shows changes over time in the ambient temperature and the temperature inside the activated carbon when the temperature was raised to the maximum temperature of 100 ° C. The temperature inside the activated carbon was measured by inserting a thermocouple inside the activated carbon. As is evident from FIG. 4, the ambient temperature and the internal temperature of the activated carbon were substantially equal, and thus it was found that the activated carbon did not generate heat.
【００１６】次に格子状に成形した活性炭をＫ2 ＣＯ3
７規定溶液に含浸した後、脱水、乾燥した活性炭につい
て、クラックの発生頻度を図６に示してしている。クラ
ック発生頻度は、試料数５０個で測定した。図６から明
らかなように、水酸化カリウムを含浸した活性炭に比較
し、クラックの発生頻度が極めて少なく、水含浸の活性
炭とほぼ同等のクラックの発生頻度をしている。Next, the activated carbon formed in a lattice shape is made of K 2 CO 3
FIG. 6 shows the frequency of occurrence of cracks for the activated carbon which was impregnated with the 7N solution, dehydrated, and dried. The crack occurrence frequency was measured with 50 samples. As is clear from FIG. 6, the frequency of occurrence of cracks is extremely low as compared with activated carbon impregnated with potassium hydroxide, and the frequency of occurrence of cracks is almost the same as that of activated carbon impregnated with water.
【００１７】比較例比較のため、実施例と同じ格子状に
成形した活性炭をＫＯＨ７規定溶液に浸漬した後、脱
水、乾燥した。乾燥条件は、１０〜２０℃づつ２時間毎
に昇温し、最高温度６０℃、７０℃、８０℃、８５℃
で、それぞれ４時間乾燥した。最高温度８５℃まで昇温
した場合について、雰囲気温度と活性炭内部の温度の経
時変化を図５に示す。図５から明らかなようにいずれの
温度の場合も、活性炭内部温度は雰囲気温度よりも高く
なり、８０℃を超えると、活性炭が発火している。した
がって、活性炭の発熱が生じることを示している。Comparative Example For the purpose of comparison, activated carbon formed into the same lattice as in the example was immersed in a KOH 7N solution, then dehydrated and dried. The drying conditions are as follows: the temperature is raised every 2 hours by 10 to 20 ° C, and the maximum temperature is 60 ° C, 70 ° C, 80 ° C, 85 ° C.
For 4 hours each. FIG. 5 shows changes over time in the ambient temperature and the temperature inside the activated carbon when the temperature was raised to the maximum temperature of 85 ° C. As is clear from FIG. 5, at any temperature, the internal temperature of the activated carbon becomes higher than the ambient temperature, and when it exceeds 80 ° C., the activated carbon is ignited. This indicates that the activated carbon generates heat.
【００１８】このような活性炭の発熱によって、実施例
と同じ格子状に成形した活性炭をＫＯＨ７規定溶液に浸
漬した後、脱水、乾燥した活性炭は、図６から明らかな
ようにクラックの発生頻度が極めて多くなっているもの
とみられる。次に本発明の空気浄化剤を用いた格子構造
状活性炭の例を図７、図８に示す。図７において、活性
炭４０は全体として直方体状に形成されており、かつ、
多数の貫通した格子状孔４２を有し、格子孔４２は例え
ば、開口径ｌ＝０．７〜１．２ｍｍ、壁厚ｔ＝０．２〜
０．４ｍｍで構成されている。なお、活性炭４０は、格
子状に限らず、ハニカム状構造でもよい。Due to the heat generated by the activated carbon, the activated carbon formed into the same lattice as in the example was immersed in a KOH 7N solution, and then dehydrated and dried, as shown in FIG. It seems that it is increasing. Next, FIGS. 7 and 8 show examples of activated carbon having a lattice structure using the air purifying agent of the present invention. In FIG. 7, the activated carbon 40 is formed in a rectangular parallelepiped shape as a whole, and
It has a large number of penetrating lattice holes 42, and the lattice holes 42 have, for example, an opening diameter l = 0.7 to 1.2 mm and a wall thickness t = 0.2 to
0.4 mm. The activated carbon 40 is not limited to the lattice shape, and may have a honeycomb structure.
【００１９】このように構成された活性炭４０は、図７
に示すように発泡スチロール性中枠４４内に複数個整列
して配置されている。各活性炭４０の間にはポリエステ
ル繊維製緩衝材４６が配置されており、活性炭４０同士
が直接接触しないようになっている。これにより、活性
炭４０同士の接触によって生じる微粒子の発生を防止で
きる。更に、活性炭４０の上面、下面にはポリエステル
繊維製保護シート４８、５０が設けられている。The activated carbon 40 having the above-described structure is shown in FIG.
As shown in the figure, a plurality of the styrofoam middle frames 44 are arranged in a line. A cushioning material 46 made of polyester fiber is arranged between the activated carbons 40 so that the activated carbons 40 do not directly contact each other. This can prevent the generation of fine particles caused by the contact between the activated carbons 40. Further, protective sheets 48 and 50 made of polyester fiber are provided on the upper and lower surfaces of the activated carbon 40.
【００２０】更に、このように構成された活性炭４０に
は、下枠５２、下側エキスパンドメタル５４、粗フィル
タ５６、上側エキスパンドメタル５８、上枠６０が重ね
られ、ボルト６２に一体にされてガス吸収フィルタを構
成している。このようなガス吸収フィルタを、例えば、
半導体製造設備におけるクリーンルーム内の清浄作業域
周囲の天井のＨＥＰＡフィルタの送風経路をなす循環通
路入口に設置すると、粒状活性炭を使用したガス吸収フ
ィルタに比較して圧力損失が少なく、かつ、活性炭同士
の接触による発塵が少なくなると共にフッ化水素等の酸
性ガスを精度よく吸収除去することができるため、ＨＥ
ＰＡフィルタの損傷を防止でき、ボロン化合物等がシリ
コン半導体ウエハに付着することを未然に防ぐことが可
能となる。利点がある。Further, a lower frame 52, a lower expanded metal 54, a coarse filter 56, an upper expanded metal 58, and an upper frame 60 are superimposed on the activated carbon 40 having the above-described structure, and are integrated with a bolt 62 to form a gas. It constitutes an absorption filter. Such a gas absorption filter, for example,
When installed at the entrance of the circulation passage that forms the airflow path of the HEPA filter in the ceiling around the clean working area in the clean room in the semiconductor manufacturing facility, the pressure loss is smaller than that of the gas absorption filter using granular activated carbon, and the activated carbon Since the generation of dust due to contact is reduced and the acidic gas such as hydrogen fluoride can be accurately absorbed and removed, HE
The PA filter can be prevented from being damaged, and the boron compound or the like can be prevented from adhering to the silicon semiconductor wafer. There are advantages.
【００２１】[0021]
【発明の効果】以上のように本発明によれば、格子状活
性炭成形物をカリウムの炭酸塩溶液に浸漬した後、水切
りし、乾燥温度が７０〜１００℃の範囲から選んだ所定
の最高温度になるまで徐々に昇温し、前記最高温度で加
熱乾燥させて、前記格子状活性炭成形物にカリウムの炭
酸塩を担持させたので、空気の浄化に有効な成分を担持
した強固な活性炭成形体を得ることができ、空気浄化剤
の使用時における発塵量を抑制し、かつ、成形体のヒビ
割れを未然に防止することができる。また、空気浄化剤
の水分含有率を１０％以下にするので、水が空気浄化剤
の細孔中に残留することなく、この細孔内への酸性ガス
の進入が妨害されない。As described above, according to the present invention, a grid-like activated carbon molded product is immersed in a carbonate solution of potassium, then drained, and dried at a predetermined temperature selected from the range of 70 to 100 ° C.
Gradually rises to the maximum temperature of
By heat drying , the potassium activated carbonate was supported on the lattice-shaped activated carbon molded product, so that it was possible to obtain a strong activated carbon molded product carrying an effective component for air purification, It is possible to suppress the amount of dust generation and to prevent cracking of the molded article before it occurs. Further, since the water content of the air purifying agent is set to 10% or less, water does not remain in the pores of the air purifying agent, and the entry of the acid gas into the pores is not hindered.
【図面の簡単な説明】[Brief description of the drawings]
【図１】水含浸活性炭の示差熱測定結果を示すグラフで
ある。FIG. 1 is a graph showing the results of differential heat measurement of water-impregnated activated carbon.
【図２】水酸化カリウム含浸活性炭の示差熱測定結果を
示すグラフである。FIG. 2 is a graph showing the measurement results of differential heat of activated carbon impregnated with potassium hydroxide.
【図３】活性炭に水酸化ナトリウム、炭酸カリウム及び
炭化水素カリウムを各々担持したときの示差熱測定結果
を示すグラフである。FIG. 3 is a graph showing the results of differential calorimetry when sodium hydroxide, potassium carbonate and potassium hydrocarbon are each supported on activated carbon.
【図４】炭酸カリウム含浸活性炭の乾燥温度と炭酸カリ
ウム含浸活性炭の内部温度の関係を示すグラフである。FIG. 4 is a graph showing the relationship between the drying temperature of potassium carbonate impregnated activated carbon and the internal temperature of potassium carbonate impregnated activated carbon.
【図５】水酸化カリウム含浸活性炭の乾燥温度と水酸化
カリウム含浸活性炭の内部温度の関係を示すグラフであ
る。FIG. 5 is a graph showing the relationship between the drying temperature of potassium hydroxide impregnated activated carbon and the internal temperature of potassium hydroxide impregnated activated carbon.
【図６】水、炭酸カリウム、水酸化カリウムを各々含浸
した活性炭の乾燥温度とクラック発生頻度の関係を示す
グラフである。FIG. 6 is a graph showing the relationship between the drying temperature of activated carbon impregnated with water, potassium carbonate, and potassium hydroxide, respectively, and the frequency of occurrence of cracks.
【図７】本発明の空気浄化剤を用いた格子構造状活性炭
を示す要部斜視図である。FIG. 7 is a perspective view of an essential part showing a grid-structured activated carbon using the air purifying agent of the present invention.
【図８】図７に示す格子構造状活性炭を用いたガス吸収
フィルタを示す分解図である。FIG. 8 is an exploded view showing a gas absorption filter using the activated carbon having a lattice structure shown in FIG. 7;
４０ 格子構造状活性炭 ４２ 格子状孔 ４４ 中枠 ４６ 緩衝材 ４８ 保護シート ５０ 保護シート ５２ 下枠 ５４ 下側エキスパンドメタル ５６ 粗フィルタ ５８ 上側エキスパンドメタル ６０ 上枠 ６２ ボルト Reference Signs List 40 Activated carbon lattice structure 42 Grid holes 44 Middle frame 46 Buffer material 48 Protective sheet 50 Protective sheet 52 Lower frame 54 Lower expanded metal 56 Coarse filter 58 Upper expanded metal 60 Upper frame 62 Volt
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高石 優 山梨県中巨摩郡竜王町西八幡4617番地 日立製作所 甲府工場内 (72)発明者 小田切 幸成 山梨県中巨摩郡竜王町西八幡4617番地 日立製作所 甲府工場内 (72)発明者 小塩 良次 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 大沼 務 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 鈴木 道夫 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 斉木 篤 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 浅見 欽一郎 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 小島 清二 東京都千代田区内神田１丁目１番14号 日立プラント建設株式会社内 (72)発明者 河西 正隆 東京都豊島区北大塚１丁目13番４号 株 式会社 エイチ・ピー・シー産業内 (56)参考文献 特開 平４−90849（ＪＰ，Ａ) 特開 平２−268829（ＪＰ，Ａ) 特開 昭54−35188（ＪＰ，Ａ) 特開 昭63−130138（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 20/20 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yu Takaishi 4617 Nishi-Hachiman, Ryuo-cho, Nakakoma-gun, Yamanashi Prefecture Inside the Hitachi Kofu Plant (72) Inventor Yukinari Odagiri 4617 Nishi-Hachiman, Ryuo-cho, Nakakoma-gun, Yamanashi Hitachi Kofu Plant (72) Inventor Ryoji Oshio 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Hitachi Plant Construction Co., Ltd. (72) Inventor Tsutomu Onuma 1-11-1 Uchikanda, Chiyoda-ku, Tokyo Hitachi Plant Construction Co. In-company (72) Inventor Michio Suzuki 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Hitachi Plant Construction Co., Ltd. In-house (72) Inventor Kinichiro Asami 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Hitachi Plant Construction, Ltd. (72) Inventor Seiji Kojima 1-1-14 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Plant Construction Co., Ltd. (72) Masataka Kasai 1-13-4 Kita-Otsuka 1-chome, Toshima-ku, Tokyo H.P.・ In the sea industry (56) References JP-A-4-90849 (JP, A) JP-A-2-268829 (JP, A) JP-A-54-35188 (JP, A) JP-A-63-130138 (JP) , A) (58) Field surveyed (Int. Cl. 7 , DB name) B01J 20/20
Claims (3)
溶液に浸漬した後、水切りし、乾燥温度が７０〜１００
℃の範囲から選んだ所定の最高温度になるまで徐々に昇
温し、前記最高温度で加熱乾燥させて、前記格子状活性
炭成形物にカリウムの炭酸塩を担持させたことを特徴と
する空気の浄化剤。1. A grid-like activated carbon molded product is immersed in a potassium carbonate solution, drained, and dried at a temperature of 70 to 100.
Gradually increase until the specified maximum temperature selected from the range of ° C
An air purifier comprising heating and drying at the maximum temperature to carry potassium carbonate on the lattice-shaped activated carbon molded product.
を有し、該格子状孔の開口径が０.７〜１．２ｍｍ、壁
厚が０．２〜０．４ｍｍであることを特徴とする請求項
１記載の空気の浄化剤。2. The grid-like activated carbon molded product has a large number of grid-like holes, and the opening diameter of the grid-like holes is 0.7 to 1.2 mm and the wall thickness is 0.2 to 0.4 mm. The air purifying agent according to claim 1, wherein:
溶液に浸漬した後、水切りし、乾燥温度が７０〜１００
℃の範囲から選んだ所定の最高温度になるまで徐々に昇
温すると共に、前記格子状活性炭成形物の水分含有率が
１０％以下になるまで前記最高温度で加熱乾燥させるこ
とを特徴とする空気の浄化剤の製造方法。3. A grid-like activated carbon molded product is immersed in a potassium carbonate solution, drained, and dried at a temperature of 70 to 100.
Gradually increase until the specified maximum temperature selected from the range of ° C
While heating, the water content of the lattice-shaped activated carbon molded product is
A method for producing an air purifying agent, comprising heating and drying at the maximum temperature until the concentration becomes 10% or less .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03068411A JP3134330B2 (en) | 1991-04-01 | 1991-04-01 | Air purifying agent and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03068411A JP3134330B2 (en) | 1991-04-01 | 1991-04-01 | Air purifying agent and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04305245A JPH04305245A (en) | 1992-10-28 |
| JP3134330B2 true JP3134330B2 (en) | 2001-02-13 |
Family
ID=13372911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03068411A Expired - Fee Related JP3134330B2 (en) | 1991-04-01 | 1991-04-01 | Air purifying agent and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3134330B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100891597B1 (en) * | 2001-10-12 | 2009-04-08 | 아사히 가라스 가부시키가이샤 | Method for removing halogen-containing gas |
| JP5144016B2 (en) * | 2006-02-24 | 2013-02-13 | 三菱重工メカトロシステムズ株式会社 | Method for producing acid gas absorbent |
| CN109455713A (en) * | 2018-12-07 | 2019-03-12 | 江苏浦士达环保科技股份有限公司 | The preparation process of industrial high-efficient deamination active carbon |
-
1991
- 1991-04-01 JP JP03068411A patent/JP3134330B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04305245A (en) | 1992-10-28 |
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