JPH059015A - Manufacture of activated carbon stuck with chemical - Google Patents
Manufacture of activated carbon stuck with chemicalInfo
- Publication number
- JPH059015A JPH059015A JP3183227A JP18322791A JPH059015A JP H059015 A JPH059015 A JP H059015A JP 3183227 A JP3183227 A JP 3183227A JP 18322791 A JP18322791 A JP 18322791A JP H059015 A JPH059015 A JP H059015A
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- chemical
- reduced pressure
- impregnated
- chemical solution
- 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.)
- Pending
Links
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、空気中の酸性ガスを除
去して空気を清浄化する浄化剤として有用な活性炭の製
造方法に係り、特に、薬剤を添着した活性炭の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing activated carbon which is useful as a purifying agent for purifying air by removing acid gas in the air, and more particularly to a method for producing activated carbon impregnated with a chemical.
【０００２】[0002]
【従来の技術】空気中のＳＯ2 、ＨＣl 等の酸性ガス
は、絵画等の美術品の変色、通信設備、電子計算機等の
部品の腐食などの問題を引き起こす。また、半導体の製
造ラインでは、製品の歩留りを向上させるために、これ
ら酸性ガスの気中濃度を極力低下させることが望まれて
いる。これらの空気中の酸性ガスを除去する方法として
は、過マンガン酸カリウムとベントナイトとの混練成形
物（特公昭５２−１５２６６１号公報）や活性炭を用い
ることが知られている。この活性炭の性能を向上させる
ため、水酸化ナトリウム（ＮａＯＨ）、水酸化カリウム
（ＫＯＨ）、炭酸ナトリウム（Ｎａ2 ＣＯ3 ）、炭酸カ
リウム（Ｋ2 ＣＯ3 ）等のアルカリを主成分とした薬剤
を添着させる方法も知られている。このようなアルカリ
を添着した活性炭を用いる方法は、酸性ガスを最も効率
よく除去できる有望な方法である。 2. Description of the Related Art Acid gases such as SO 2 and HCl in the air cause problems such as discoloration of works of art such as paintings and corrosion of parts such as communication equipment and electronic computers. Further, in the semiconductor production line, it is desired to reduce the concentration of these acidic gases in the air as much as possible in order to improve the product yield. As a method for removing the acidic gas in the air, it is known to use a kneaded molded product of potassium permanganate and bentonite (Japanese Patent Publication No. 52-152661) or activated carbon. In order to improve the performance of this activated carbon, chemicals mainly composed of alkali such as sodium hydroxide (NaOH), potassium hydroxide (KOH), sodium carbonate (Na 2 CO 3 ) and potassium carbonate (K 2 CO 3 ) are used. A method of attaching is also known. Such a method using activated carbon impregnated with an alkali is a promising method that can most efficiently remove acidic gas.
【０００３】上記のような薬剤を添着した活性炭の製造
方法としては、所定量の薬品を溶解した液に活性炭を浸
漬し、引き上げた活性炭を水切りした後、薬液とともに
活性炭を乾燥する方法、あるいは薬品を溶解した液に活
性炭を浸漬し、強制的に遠心脱水した後、乾燥する方法
の二つの方法があるが、前者の方法では、乾燥後の活性
炭の表面に薬品が析出し、あたかも粉をまぶしたような
状態となることから、このような方法で製造した空気浄
化剤を使用した場合、析出した薬品の飛散が危惧される
ため、従来は、後者の方法で製造するのが一般的であっ
た。しかしながら、後者の方法では、強制的に脱水する
ため、薬品の添着量が前者に比べて少なくなり、性能の
低下することが予想される。As a method for producing the activated carbon impregnated with the above-mentioned chemicals, the activated carbon is immersed in a liquid in which a predetermined amount of the chemical is dissolved, the activated carbon taken up is drained, and then the activated carbon is dried together with the chemical liquid. There are two methods of immersing the activated carbon in the liquid in which is dissolved, forcibly centrifuging and dehydrating it, and then drying it.In the former method, the chemical deposits on the surface of the activated carbon after drying, and it looks as if sprinkled with powder. Since the above-mentioned state occurs, when the air purifying agent produced by such a method is used, there is a concern that the precipitated chemicals may be scattered, so conventionally, the latter method was generally used. .. However, in the latter method, since the dehydration is forcibly performed, the amount of chemicals impregnated is smaller than that in the former method, and it is expected that the performance will be deteriorated.
【０００４】これを改善する方法として、本発明者ら
は、薬剤溶液に活性炭を浸漬する工程を、活性炭を浸漬
してある薬剤溶液の入った容器内を減圧下に保持して行
い、この浸漬工程の間に減圧解除を１回以上行うことに
より、活性炭の細孔内の空気及び減圧中に活性炭表面に
付着した気泡を最大限に取り除いて薬剤の添着量を増加
する方法を提案した。この方法は、常圧浸漬を行う従来
方法に比べてかなり薬剤の添着量を増量できるものであ
るが、薬剤の添着量に限界があり、さらに酸性ガスの除
去性能を向上させるためには、薬剤の添着量をさらに増
加することが望まれる。As a method for improving this, the present inventors carried out the step of immersing the activated carbon in the drug solution by keeping the inside of the container containing the drug solution in which the activated carbon was immersed under reduced pressure, A method has been proposed in which air is removed from the pores of activated carbon and bubbles adhering to the surface of activated carbon during depressurization are maximally removed by performing depressurization at least once during the process, thereby increasing the amount of drug adhering. Although this method can considerably increase the amount of the drug impregnated as compared with the conventional method of performing atmospheric pressure immersion, there is a limit to the amount of the drug impregnated, and in order to further improve the acid gas removal performance, It is desirable to further increase the impregnated amount of.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、薬剤を溶解
した溶液に活性炭を減圧下に浸漬し、この浸漬工程の間
に１回以上減圧解除を行い、強制的に脱水した後、該活
性炭を乾燥する工程から成る、薬剤を添着した活性炭の
製造方法において、薬剤の添着量を極力多くしうる方法
を提供することを目的とする。SUMMARY OF THE INVENTION According to the present invention, activated carbon is immersed in a solution in which a drug is dissolved under reduced pressure, and the reduced pressure is released once or more during this immersion step to forcibly dehydrate the activated carbon. It is an object of the present invention to provide a method for producing an activated carbon impregnated with a drug, which comprises a step of drying the agent, wherein the amount of the drug impregnated can be maximized.
【０００６】[0006]
【課題を解決するための手段】本発明は、活性炭を浸漬
してある薬剤溶液の入った容器内を減圧にし、活性炭の
細孔内の空気を強制的に抜いても、下記の気体の状態方
程式 ＰＶ＝Ｒ・Ｔ 〔式中、Ｐは圧力を示し、Ｖは気体の体積を示し、Ｒは
気体定数を示し、Ｔは絶対温度を示す〕から、減圧中の
空気の体積と減圧解除後の空気の体積の間には、次式 Ｐ1・Ｖ1 ＝Ｐ2・Ｖ2 〔式中、Ｐ1 は減圧中の圧力を示し、Ｖ1 は減圧中の空
気の体積を示し、Ｐ2 は減圧解除後の圧力を示し、Ｖ2
は減圧解除後の体積を示す〕の関係が成立し、減圧解除
後においても、Ｖ2 ＝（Ｐ1 ／Ｐ2 ）Ｖ1 の空気が、活
性炭の細孔の奥に残存し、この部分に薬液が保持されな
いことに着目し、この部分にも薬液を添着するために、
減圧解除後に活性炭を浸漬してある薬剤溶液の入った容
器内を加圧することによって上記目的を達成したもので
ある。According to the present invention, even if the inside of the container containing the drug solution in which the activated carbon is immersed is decompressed and the air in the pores of the activated carbon is forcibly removed, the following gas state is obtained. From the equation PV = R · T [wherein P indicates pressure, V indicates gas volume, R indicates gas constant, and T indicates absolute temperature], from the volume of air during depressurization and after depressurization Between the volume of air, the following equation P 1 · V 1 = P 2 · V 2 [wherein, P 1 represents the pressure during decompression, V 1 represents the volume of air during decompression, P 2 Indicates the pressure after releasing the reduced pressure, and V 2
Represents the volume after the decompression is released], and even after the decompression is released, the air of V 2 = (P 1 / P 2 ) V 1 remains in the deep part of the pores of the activated carbon. Paying attention to the fact that the chemical is not retained, in order to attach the chemical to this part as well,
The above object is achieved by pressurizing the inside of the container containing the drug solution in which activated carbon is immersed after releasing the reduced pressure.
【０００７】すなわち、本発明による薬剤を添着した活
性炭の製造方法は、活性炭を浸漬してある薬剤溶液の入
った容器内を減圧下に保持し、途中で減圧解除を１回以
上行うことにより活性炭を薬剤溶液で含浸する第一工
程、該活性炭を脱水する第二工程及び脱水後の活性炭を
乾燥する第三工程から成る薬剤を添着した活性炭の製造
方法において、第一工程の減圧解除終了後に薬剤溶液の
入った容器内を大気圧を超える圧力に加圧することを特
徴とする。That is, in the method for producing activated carbon impregnated with a chemical according to the present invention, the activated carbon is immersed in the container containing the chemical solution under a reduced pressure, and the decompression is released at least once during the process. In the method for producing an activated carbon impregnated with a chemical agent, which comprises a first step of impregnating the activated carbon with a chemical solution, a second step of dehydrating the activated carbon and a third step of drying the activated carbon after dehydration, the chemical agent after the decompression of the first step is completed. It is characterized in that the inside of the container containing the solution is pressurized to a pressure exceeding atmospheric pressure.
【０００８】本発明において活性炭に添着する薬剤とし
ては、特に制限はなく、各種のものを用いることがで
き、例えば、水酸化ナトリウム、水酸化カリウム、炭酸
ナトリウム等のアルカリ、沃化カリウム、ヨウ素酸カリ
ウム等のヨウ化物などが挙げられる。In the present invention, the chemicals to be impregnated on the activated carbon are not particularly limited and various chemicals can be used. Examples thereof include alkali such as sodium hydroxide, potassium hydroxide and sodium carbonate, potassium iodide and iodic acid. Examples thereof include iodides such as potassium.
【０００９】本発明の方法を実施する場合、まず、薬剤
を溶解した水溶液中に活性炭を浸漬し、浸漬容器内を減
圧にする。この減圧は、特に制限はないが、通常、５〜
１００Torr、好ましくは５〜３０Torrの真空度とする。When carrying out the method of the present invention, first, activated carbon is immersed in an aqueous solution in which a drug is dissolved, and the pressure in the immersion container is reduced. This depressurization is not particularly limited, but usually 5 to
The vacuum degree is 100 Torr, preferably 5 to 30 Torr.
【００１０】本発明の方法においては、上記のような減
圧状態に浸漬中の活性炭をおき、活性炭の細孔内の空気
を抜くとともに細孔内への薬液の浸入を促進する。しか
し、減圧に保持したままでは、活性炭表面に付着した一
部の気泡が抜けきらないまま存在し、この気泡が細孔内
の空気の通り道を塞ぎ、薬剤の添着を妨げることがあ
る。そのため、本発明においては、減圧操作を所定時間
後に一時的に停止し、容器内を大気圧状態に開放して活
性炭表面に付着した気泡を除去する。In the method of the present invention, the activated carbon being immersed in the above-described reduced pressure state is placed to remove air from the pores of the activated carbon and to promote the infiltration of the chemical solution into the pores. However, if it is kept under reduced pressure, some of the bubbles attached to the surface of the activated carbon are left unremoved, and these bubbles may block the passage of the air in the pores, impeding the drug attachment. Therefore, in the present invention, the depressurizing operation is temporarily stopped after a predetermined time, and the inside of the container is opened to the atmospheric pressure state to remove bubbles adhering to the surface of the activated carbon.
【００１１】本発明の方法においては、上記の減圧解除
を１回以上行い、最後の減圧解除後に活性炭を浸漬して
ある薬剤溶液の入った容器内を大気圧を超える圧力に加
圧する。加圧条件は、大気圧を超える圧力であれば良い
が、５〜１０気圧であるのが好ましい。In the method of the present invention, the above-described depressurization is released once or more, and after the final depressurization is released, the inside of the container containing the drug solution in which activated carbon is immersed is pressurized to a pressure exceeding atmospheric pressure. The pressurizing condition may be a pressure exceeding atmospheric pressure, but is preferably 5 to 10 atmospheric pressure.
【００１２】この加圧浸漬を行うことによって、活性炭
の細孔の奥に残存していた気泡は、圧縮されるととも
に、一部は薬剤溶液中に溶け込み、その体積は減少す
る。このようにして、活性炭の細孔の奥にも薬剤を効率
よく添着することができる。By carrying out this pressure immersion, the bubbles remaining in the pores of the activated carbon are compressed, and at the same time, some of them are dissolved in the drug solution and their volume is reduced. In this way, the chemical agent can be efficiently impregnated even inside the pores of the activated carbon.
【００１３】本発明の方法においては、第一工程である
減圧浸漬工程の間に１回以上の減圧解除を行い、最後の
減圧解除後に加圧浸漬を行うことが必要である。減圧及
び加圧の維持時間は、活性炭の仕込み量、減圧及び加圧
の程度等によって適宜決定することができる。また、合
計の浸漬時間は、従来の単純な浸漬に要する浸漬時間と
同程度であってよく、通常、0.５〜５時間とすればよ
い。In the method of the present invention, it is necessary to release the reduced pressure at least once during the reduced pressure soaking step, which is the first step, and perform the pressure soaking after the final reduced pressure release. The time for maintaining the reduced pressure and the increased pressure can be appropriately determined depending on the charged amount of activated carbon, the degree of the reduced pressure and the increased pressure, and the like. Further, the total immersion time may be approximately the same as the immersion time required for the conventional simple immersion, and is usually 0.5 to 5 hours.
【００１４】上記のようにして、活性炭に薬剤溶液を充
分に含浸させた後、脱水及び乾燥を常法で行うことによ
り、薬剤添着量の増加した活性炭が得られる。After the activated carbon is sufficiently impregnated with the drug solution as described above, dehydration and drying are carried out in the usual manner to obtain activated carbon having an increased drug loading.
【００１５】[0015]
【実施例】次に、実施例に基づいて本発明を詳述する
が、本発明はこれに限定されるものではない。EXAMPLES Next, the present invention will be described in detail based on examples, but the present invention is not limited thereto.
【００１６】実施例１ ハニカム状の活性炭を８規定の炭酸ナトリウム( Ｎａ2
ＣＯ3 ）溶液に表１に示した２通りの条件で浸漬し、そ
れぞれ遠心分離機を用いて７００rpm で２分間脱水した
後、恒温槽内で１１０℃で５時間乾燥し、得られた活性
炭について炭酸ナトリウムの添着量を次式により算出
し、得られた結果を表２に示す。 Ｎａ2 ＣＯ3 の添着量（％）＝（Ｘ1 −Ｘ0 ）／Ｘ0 ×
１００ 〔但し、Ｘ0 は浸漬前の活性炭の乾燥重量を示し、Ｘ1
は浸漬、脱水、乾燥後の活性炭の重量を示す。〕Example 1 Honeycomb-like activated carbon was replaced with 8N sodium carbonate (Na 2
CO 3 ) solution was dipped under the two conditions shown in Table 1, dehydrated for 2 minutes at 700 rpm using a centrifuge, and then dried in a constant temperature bath at 110 ° C. for 5 hours. The amount of sodium carbonate impregnated was calculated by the following formula, and the obtained results are shown in Table 2. Encapsulation amount of Na 2 CO 3 (%) = (X 1 −X 0 ) / X 0 ×
100 [where X 0 represents the dry weight of activated carbon before immersion, X 1
Indicates the weight of activated carbon after immersion, dehydration and drying. ]
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】表２に示したとおり、本発明の方法である
Ａ方法では、薬剤の添着量がＢ方法に比べて増加できる
ことが実証された。As shown in Table 2, it was proved that the method A, which is the method of the present invention, can increase the amount of the drug loaded as compared with the method B.
【００２０】なお、上記実施例においては、薬液として
炭酸ナトリウム水溶液を用いたが、ヨウ化物イオン、そ
の他のイオンを溶解した薬液を用いても、上記と同様の
結果が得られた。In the above examples, the sodium carbonate aqueous solution was used as the chemical solution, but the same result as above was obtained even if the chemical solution in which iodide ions and other ions were dissolved was used.
【００２１】[0021]
【発明の効果】本発明の方法によれば、同じ浸漬時間で
薬剤の添着量を著しく増加することができる。また、本
発明の方法によれば、活性炭の細孔の内部まで効率よく
薬剤が浸入し、添着するので、遠心脱水機を用いる強制
脱水を行っても高い薬品添着量が達成される。したがっ
て、本発明の方法によって得られた活性炭は、高性能の
空気浄化剤などとして有用である。EFFECTS OF THE INVENTION According to the method of the present invention, it is possible to remarkably increase the amount of chemicals to be impregnated with the same immersion time. Further, according to the method of the present invention, the chemicals efficiently infiltrate and impregnate the inside of the pores of the activated carbon, so that a high chemical impregnation amount can be achieved even by performing forced dehydration using a centrifugal dehydrator. Therefore, the activated carbon obtained by the method of the present invention is useful as a high performance air purifying agent.
フロントページの続き (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Front Page Continuation (72) Inventor Ryoji Oshio 1-1-14 Kanda, Uchida, Chiyoda-ku, Tokyo Inside Hiritsuben Plant Construction Co., Ltd.
Claims (1)
容器内を減圧下に保持し、途中で減圧解除を１回以上行
うことにより活性炭を薬剤溶液で含浸する第一工程、該
活性炭を脱水する第二工程及び脱水後の活性炭を乾燥す
る第三工程から成る薬剤を添着した活性炭の製造方法に
おいて、第一工程の減圧解除終了後に薬剤溶液の入った
容器内を大気圧を超える圧力に加圧することを特徴とす
る薬剤を添着した活性炭の製造方法。Claim: What is claimed is: 1. A method of impregnating activated carbon with a chemical solution by keeping the inside of a container containing a chemical solution in which activated carbon is immersed under reduced pressure and releasing the reduced pressure at least once during the process. In the method for producing an activated carbon impregnated with a chemical agent, which comprises one step, a second step of dehydrating the activated carbon and a third step of drying the activated carbon after dehydration, in a container containing the chemical solution after the release of the reduced pressure in the first step, A method for producing activated carbon impregnated with a chemical, which comprises pressurizing to a pressure exceeding atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183227A JPH059015A (en) | 1991-06-27 | 1991-06-27 | Manufacture of activated carbon stuck with chemical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3183227A JPH059015A (en) | 1991-06-27 | 1991-06-27 | Manufacture of activated carbon stuck with chemical |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH059015A true JPH059015A (en) | 1993-01-19 |
Family
ID=16132017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3183227A Pending JPH059015A (en) | 1991-06-27 | 1991-06-27 | Manufacture of activated carbon stuck with chemical |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH059015A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009525180A (en) * | 2006-01-30 | 2009-07-09 | アドバンスド テクノロジー マテリアルズ，インコーポレイテッド | Carbon materials useful for fluid storage / distribution, desulfurization, and infrared radiation, and apparatus and methods using the same |
| US9468901B2 (en) | 2011-01-19 | 2016-10-18 | Entegris, Inc. | PVDF pyrolyzate adsorbent and gas storage and dispensing system utilizing same |
| WO2020031516A1 (en) * | 2018-08-10 | 2020-02-13 | 株式会社フジタ | Method of manufacturing adsorbent |
| JP2020028831A (en) * | 2018-08-21 | 2020-02-27 | 株式会社フジタ | Manufacturing method of metal carrying carbide, and carbide manufacturing device |
| CN114433095A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Nickel catalyst and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4938889A (en) * | 1972-08-18 | 1974-04-11 | ||
| JPS51148692A (en) * | 1975-06-16 | 1976-12-21 | Shimizu Constr Co Ltd | Method for treating the active carbon without reducing the nitrogen di oxide |
-
1991
- 1991-06-27 JP JP3183227A patent/JPH059015A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4938889A (en) * | 1972-08-18 | 1974-04-11 | ||
| JPS51148692A (en) * | 1975-06-16 | 1976-12-21 | Shimizu Constr Co Ltd | Method for treating the active carbon without reducing the nitrogen di oxide |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009525180A (en) * | 2006-01-30 | 2009-07-09 | アドバンスド テクノロジー マテリアルズ，インコーポレイテッド | Carbon materials useful for fluid storage / distribution, desulfurization, and infrared radiation, and apparatus and methods using the same |
| US8221532B2 (en) | 2006-01-30 | 2012-07-17 | Carruthers J Donald | Nanoporous articles and methods of making same |
| US9468901B2 (en) | 2011-01-19 | 2016-10-18 | Entegris, Inc. | PVDF pyrolyzate adsorbent and gas storage and dispensing system utilizing same |
| WO2020031516A1 (en) * | 2018-08-10 | 2020-02-13 | 株式会社フジタ | Method of manufacturing adsorbent |
| JPWO2020031516A1 (en) * | 2018-08-10 | 2021-08-10 | 株式会社フジタ | Manufacturing method of adsorbent |
| JP2020028831A (en) * | 2018-08-21 | 2020-02-27 | 株式会社フジタ | Manufacturing method of metal carrying carbide, and carbide manufacturing device |
| CN114433095A (en) * | 2020-10-20 | 2022-05-06 | 中国石油化工股份有限公司 | Nickel catalyst and preparation method and application thereof |
| CN114433095B (en) * | 2020-10-20 | 2024-05-03 | 中国石油化工股份有限公司 | Nickel catalyst and preparation method and application thereof |
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