JP3376431B2

JP3376431B2 - Method for producing activated carbon from waste tires

Info

Publication number: JP3376431B2
Application number: JP29556292A
Authority: JP
Inventors: 勝美松本; 重和中野
Original assignee: 株式会社ジェ・シィ・エー; 大阪市
Priority date: 1992-11-05
Filing date: 1992-11-05
Publication date: 2003-02-10
Anticipated expiration: 2018-02-10
Also published as: JPH06144819A

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、廃タイヤを原料とする
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 from waste tires.

【０００２】なお、本明細書において、“％”は“重量
％”を意味する。In this specification, "%" means "% by weight".

【０００３】[0003]

【従来の技術およびその課題】廃タイヤの量は、近年増
加の一途を辿っており、また、放置された廃タイヤの火
災により重金属成分を含む有害な廃油が大量に流れ出
し、近隣に重大な環境汚染を引き起こす事例もあること
から、その処分をいかに効率良く行うかが重大な問題と
なっている。そこで、廃タイヤの有効な利用方法の開発
が種々検討されている。2. Description of the Related Art The amount of waste tires has been increasing in recent years, and a large amount of harmful waste oil containing heavy metal components flows out due to a fire of abandoned waste tires, causing a serious environment in the vicinity. Since there are cases of causing pollution, how to dispose of it efficiently is a serious problem. Therefore, various studies have been made on the development of an effective use method of the waste tire.

【０００４】廃タイヤを有効利用する方法として、従
来、廃タイヤから油成分を抽出し、残った廃タイヤ乾留
チャーを原料として活性炭を製造することが試みられて
いるが、この方法で得られる活性炭は廃タイヤ由来の亜
鉛等の重金属成分を含んでおり、活性炭の用途はこの重
金属成分の溶出を防ぐ必要性のために厳しく制限され、
例えば水処理用途での使用は、重金属の流出のために行
うことができない。一方、廃タイヤに由来する安価な活
性炭は、水処理用途等に大量に求められており、廃タイ
ヤ由来の活性炭からの重金属成分の簡便な除去方法の開
発が切望されている。As a method for effectively utilizing waste tires, it has been attempted to extract an oil component from the waste tires and produce activated carbon using the remaining waste tire dry distillation char as a raw material. The activated carbon obtained by this method has been tried. Contains heavy metal components such as zinc derived from waste tires, the use of activated carbon is severely limited due to the need to prevent elution of this heavy metal component,
For example, its use in water treatment applications cannot be done due to the outflow of heavy metals. On the other hand, inexpensive activated carbon derived from waste tires is required in large quantities for water treatment applications and the like, and development of a simple method for removing heavy metal components from activated carbon derived from waste tires has been earnestly desired.

【０００５】[0005]

【発明が解決しようとする課題】本発明は、廃タイヤを
原料とする、重金属成分を含まない無害かつ安価な活性
炭の製造方法を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing harmless and inexpensive activated carbon which does not contain heavy metal components and is made of waste tires.

【０００６】[0006]

【課題を解決するための手段】本発明者は、かかる目的
を達成するため鋭意検討を重ねた結果、重金属を含有す
る廃タイヤ乾留チャーに対し賦活処理および塩酸洗浄を
行うことにより活性炭の活性を損なうことなく効果的に
重金属成分を除去し得ることを見出した。Means for Solving the Problems As a result of intensive studies to achieve the above object, the present inventor has found that activated carbon is activated by performing activation treatment and hydrochloric acid washing on waste tire carbonization char containing heavy metals. It was found that the heavy metal component can be effectively removed without damaging it.

【０００７】即ち、本発明は、廃タイヤ乾留チャーを賦
活処理の後塩酸で洗浄することを特徴とする活性炭の製
造方法を提供するものである。That is, the present invention provides a method for producing activated carbon, which comprises rinsing waste tire dry-distilled char after activation treatment and washing with charcoal.

【０００８】また、本発明は、廃タイヤ乾留チャーを塩
酸で洗浄した後賦活処理することを特徴とする活性炭の
製造方法を提供するものである。The present invention also provides a method for producing activated carbon, which comprises rinsing waste char dry-distilled char with hydrochloric acid and then activating the char.

【０００９】本発明で用いられる廃タイヤ乾留チャー
は、特に限定されるものではないが、例えば常圧下、温
度４５０−５５０℃、不活性ガス（例えば窒素ガス）雰
囲気下で熱分解することにより製造される。The waste tire dry distillation char used in the present invention is not particularly limited, but is produced, for example, by thermal decomposition under atmospheric pressure at a temperature of 450 to 550 ° C. in an inert gas (for example, nitrogen gas) atmosphere. To be done.

【００１０】廃タイヤ乾留チャーの処理に使用される塩
酸の濃度は、例えば１〜１０％程度、好ましくは２〜５
％程度であり、塩酸の温度は室温〜８０℃程度、好まし
くは７０〜８０℃程度であり、塩酸処理の時間は１〜２
４時間程度、好ましくは２時間程度である。塩酸処理の
後は水または希アルカリを用いて洗浄を行う。洗浄の条
件および回数は塩酸処理の条件、特に塩酸の濃度により
決定される。この条件は廃タイヤ乾留チャーを賦活処理
して活性炭としたものに対しても同様に適用される。酸
成分として塩酸以外の酸、例えば硫酸や硝酸などを用い
ると、これらの酸は活性炭に残存する傾向があり好まし
くない。The concentration of hydrochloric acid used for treating waste tire carbonization char is, for example, about 1 to 10%, preferably 2 to 5%.
%, The temperature of hydrochloric acid is from room temperature to about 80 ° C., preferably about 70 to 80 ° C., and the time of hydrochloric acid treatment is from 1 to 2
It is about 4 hours, preferably about 2 hours. After the treatment with hydrochloric acid, washing with water or dilute alkali is performed. The conditions and the number of times of washing are determined by the conditions of hydrochloric acid treatment, especially the concentration of hydrochloric acid. This condition is similarly applied to the case where activated charcoal is obtained by activating the waste tire carbonization char. If an acid other than hydrochloric acid, such as sulfuric acid or nitric acid, is used as the acid component, these acids tend to remain on the activated carbon, which is not preferable.

【００１１】無処理の廃タイヤ乾留チャーおよび塩酸処
理された廃タイヤ乾留チャーの賦活処理は、常法により
行うことができ、例えば水蒸気賦活の場合は窒素、アル
ゴン等の不活性ガス雰囲気下に、例えば温度７００〜１
０００℃程度、好ましくは８００〜８５０℃程度、賦活
時間４〜８時間程度、好ましくは５〜６時間程度の条件
で行うことができる。The untreated waste tire dry distillation char and the hydrochloric acid-treated waste tire dry distillation char can be activated by a conventional method. For example, in the case of steam activation, under an atmosphere of an inert gas such as nitrogen or argon, For example, temperature 700-1
It can be carried out under conditions of about 000 ° C., preferably about 800 to 850 ° C., activation time of about 4 to 8 hours, preferably about 5 to 6 hours.

【００１２】[0012]

【発明の効果】本発明によれば、簡便な方法で且つ活性
炭の収率および吸着活性を低下させることなく、活性炭
中の金属成分を除去することができ、これにより、廃タ
イヤの効果的な処理方法および安価な活性炭の製造方法
を同時に提供することができるようになった。また、こ
の方法により製造された活性炭は、水処理等の用途に十
分使用できるだけの性能を有していることも明らかとな
った。EFFECTS OF THE INVENTION According to the present invention, the metal component in the activated carbon can be removed by a simple method without lowering the yield and adsorption activity of the activated carbon. It has become possible to simultaneously provide a treatment method and an inexpensive activated carbon production method. It was also clarified that the activated carbon produced by this method has a performance sufficient for use in applications such as water treatment.

【００１３】[0013]

【実施例】以下、本発明を実施例および比較例を挙げて
より詳細に説明する。EXAMPLES The present invention will be described in more detail below with reference to examples and comparative examples.

【００１４】[0014]

【実施例１〜３】（１）廃タイヤ乾留チャーの賦活処理常法により得られた廃タイヤ乾留チャーを１１０℃で２
時間乾燥し、図１に示す回分式外熱型ロータリーキルン
（外径６０ｃｍ，長さ１００ｃｍ）の炉心部へ投入し、
以下に示す賦活条件により賦活した：賦活温度：８５０℃、反応時間：４時間、水蒸気供給速度：１ｇ／ｇ／時間、窒素ガス流量：５００ｍｌ／分、廃タイヤ乾留チャー：５０ｇ、炉回転速度：２ｒｐｍ。[Examples 1 to 3] (1) Activation treatment of waste tire dry distillation char The waste tire dry distillation char obtained by a conventional method was subjected to 2 hours at 110 ° C.
After drying for an hour, the batch type external heating type rotary kiln (outer diameter 60 cm, length 100 cm) shown in FIG.
Activation was performed under the following activation conditions: Activation temperature: 850 ° C., reaction time: 4 hours, steam supply rate: 1 g / g / hour, nitrogen gas flow rate: 500 ml / min, waste tire carbonization char: 50 g, furnace rotation speed: 2 rpm.

【００１５】賦活終了後、窒素ガスで冷却した賦活品試
料とした。After the activation was completed, the activated product sample was cooled with nitrogen gas.

【００１６】（２）室温下での塩酸処理上記方法により得られた賦活品を１．４０ｍｍ（１２メ
ッシュ）以下に粉砕し、その１５ｇに１％ＨＣｌ、２％
ＨＣｌおよび５％ＨＣｌを各々加え、１時間攪拌した後
吸引濾過した。得られた３種類の賦活品を各々別のビー
カーに移し、精製水を加えて室温で３０分間攪拌し、濾
過した。この洗浄操作を３回繰り返し、賦活品を精製水
で洗浄した。得られた金属成分が除去された賦活品を１
１０℃で乾燥後、２５０μｍ（６０メッシュ）以下に粉
砕して活性炭試料とした。(2) Hydrochloric acid treatment at room temperature The activated product obtained by the above method was pulverized to 1.40 mm (12 mesh) or less, and 15 g of the activated product was supplemented with 1% HCl and 2%.
HCl and 5% HCl were added respectively, and the mixture was stirred for 1 hour and then suction filtered. Each of the three types of activated products obtained was transferred to another beaker, purified water was added, and the mixture was stirred at room temperature for 30 minutes and filtered. This washing operation was repeated 3 times, and the activated product was washed with purified water. 1 of the activated product from which the obtained metal components have been removed
After drying at 10 ° C., it was ground to 250 μm (60 mesh) or smaller to obtain an activated carbon sample.

【００１７】[0017]

【比較例１】実施例１（２）の１％ＨＣｌの代わりに精
製水を用いた他は実施例１と同様にして活性炭試料を得
た。Comparative Example 1 An activated carbon sample was obtained in the same manner as in Example 1 except that purified water was used instead of 1% HCl in Example 1 (2).

【００１８】[0018]

【実施例４〜６】実施例１（２）の塩酸処理に用いた１
％ＨＣｌを室温のものに代えて各々８０℃の１％ＨＣ
ｌ、２％ＨＣｌおよび５％ＨＣｌを用い、各塩酸水溶液
中での攪拌を砂浴上で温度を８０℃に保持しながら行
い、洗浄を熱水を用いて行った他は実施例１と同様にし
て活性炭試料を得た。[Examples 4 to 6] 1 used in the hydrochloric acid treatment of Example 1 (2)
% HCl at room temperature instead of 1% HC
1, 2% HCl and 5% HCl were used, stirring was carried out in each hydrochloric acid aqueous solution on a sand bath while maintaining the temperature at 80 ° C., and washing was carried out using hot water. Then, an activated carbon sample was obtained.

【００１９】[0019]

【比較例２】実施例４（２）の塩酸処理および水洗に用
いた８０℃の１％ＨＣｌに代えて８０℃の精製水を用い
た他は実施例４と同様の操作を行い活性炭試料を得た。Comparative Example 2 An activated carbon sample was prepared in the same manner as in Example 4 except that purified water at 80 ° C. was used instead of the 1% HCl at 80 ° C. used for the treatment with hydrochloric acid and washing with water in Example 4 (2). Obtained.

【００２０】[0020]

【実施例７〜１０】（ｉ）廃タイヤ乾留チャーの塩酸処理常法により得られた廃タイヤ乾留チャーを標準ふるいで
４×１２メッシュにふるい分け、１１０℃で２時間乾燥
し、該乾燥チャー１００ｇを１％塩酸および５％塩酸に
各々加えた。各濃度において塩酸処理を１時間または２
４時間放置して、合計４通りの塩酸処理を行った。各塩
酸処理後、ガラス繊維濾紙により乾留物を吸引濾過し
た。以下、実施例１（２）と同様にして洗浄操作を３回
繰り返し、次いで１１０℃で２時間乾燥して金属成分が
除去された乾留チャーを得た。Examples 7 to 10 (i) Hydrochloric Acid Treatment of Waste Tire Dry-distilled Char The waste tire dry-distilled char obtained by a conventional method is sieved to 4 × 12 mesh with a standard sieve and dried at 110 ° C. for 2 hours, and 100 g of the dried char. Were added to 1% hydrochloric acid and 5% hydrochloric acid, respectively. Hydrochloric acid treatment at each concentration for 1 hour or 2
After being left for 4 hours, a total of 4 types of hydrochloric acid treatments were performed. After each hydrochloric acid treatment, the dry distillate was suction-filtered with a glass fiber filter paper. Thereafter, the washing operation was repeated 3 times in the same manner as in Example 1 (2), and then dried at 110 ° C. for 2 hours to obtain a dry distillation char from which metal components were removed.

【００２１】（ii）賦活処理上記（ｉ）で得られた乾留チャーを図１に示す回分式外
熱型ロータリーキルンの炉心部へ投入し、以下に示す賦
活条件により賦活した：賦活温度：８５０℃、反応時間：４時間、水蒸気供給速度：０．５ｇ／ｇ／時間、窒素ガス流量：５００ｍｌ／分、乾留チャー（金属成分除去後）：５０ｇ、炉回転速度：２ｒｐｍ。(Ii) Activation Treatment The carbonization char obtained in (i) above was charged into the core of the batch type external heating rotary kiln shown in FIG. 1 and activated under the following activation conditions: Activation temperature: 850 ° C. , Reaction time: 4 hours, Steam supply rate: 0.5 g / g / hour, Nitrogen gas flow rate: 500 ml / min, Carbonization char (after removing metal components): 50 g, Furnace rotation speed: 2 rpm.

【００２２】賦活終了後、炉内を窒素ガスで冷却後に得
られた賦活品について吸着性能等の物性値を測定した。After completion of activation, the physical properties such as adsorption performance of the activated product obtained after cooling the inside of the furnace with nitrogen gas were measured.

【００２３】[0023]

【実施例１１】分析実施例１〜１０および比較例１〜２で得られた各活性炭
について、以下に示す試験を行った。Example 11 Analysis The following tests were carried out on the activated carbons obtained in Examples 1-10 and Comparative Examples 1-2.

【００２４】各試験は、以下の方法により行った。Each test was conducted by the following method.

【００２５】なお、上記表中、Ｎ₂ＢＥＴ法および窒素ガス吸着法
は、カルロ・エルバ・ストルメンタジオン（Carlo Erba
Strumentadione ）社製のソルプトマティック（Sorpto
matic)１８００型による自動測定により行った。[0025] In addition, in the above table, N ₂ BET method and nitrogen gas adsorption method are represented by Carlo Erba Stormentadione (Carlo Erba
Strumentadione) Sorptomatic (Sorpto
matic) 1800 type automatic measurement.

【００２６】また、亜鉛の分析は、具体的には以下のよ
うにして行った。The zinc analysis was carried out specifically as follows.

【００２７】すなわち、炭素試料（活性炭またはチャ
ー）３ｇにｐＨ４の水（８ｍｌの硝酸（比重１．３８）
を水で１０００倍とし、さらに１０００倍としたもの）
１５０ｍｌを加え１０分間煮沸し、冷却後水を加えて１
５０ｍｌとし、濾過した。濾液の最初の３０ｍｌを捨
て、残りの濾液を亜鉛分析に供した。That is, 3 g of carbon sample (activated carbon or char) was added to water of pH 4 (8 ml of nitric acid (specific gravity 1.38).
Was made 1000 times with water, and then 1000 times)
Add 150 ml and boil for 10 minutes. After cooling, add water and add 1
It was made up to 50 ml and filtered. The first 30 ml of the filtrate was discarded and the remaining filtrate was submitted for zinc analysis.

【００２８】また、灰分含有率は、具体的には炭素約１
ｇを磁性るつぼに取り、８００℃以上の温度で灰化する
ことにより測定した。得られた灰を（１：１）ＨＣｌ
４０ｍｌに溶かし、ビーカーに移して１０ｍｌまで加熱
濃縮した。これを濾過し、濾液を５０ｍｌのメスフラス
コに定容し、亜鉛量の分析を原子吸光法により行った。The ash content is about 1 carbon.
It was measured by placing g in a magnetic crucible and ashing at a temperature of 800 ° C. or higher. The resulting ash was treated with (1: 1) HCl
It was dissolved in 40 ml, transferred to a beaker and heated to 10 ml for concentration. This was filtered, the volume of the filtrate was fixed in a 50 ml volumetric flask, and the amount of zinc was analyzed by the atomic absorption method.

【００２９】上記方法により測定した各測定値を以下の
表１〜４に示す。また、実施例１（１）で得た賦活試料
の細孔径分布を図２に示す。The respective measured values measured by the above method are shown in Tables 1 to 4 below. The pore size distribution of the activated sample obtained in Example 1 (1) is shown in FIG.

【００３０】[0030]

【表１】 [Table 1]

【００３１】＊塩酸処理による灰分の減少効果* Ash reduction effect of hydrochloric acid treatment

【００３２】[0032]

【表２】 [Table 2]

【００３３】[0033]

【表３】 [Table 3]

【００３４】なお、表３中“食添法”とは、食品添加物
公定書に定める方法に従って求めたことを意味し、“Ｊ
ＷＷＡ”とは、日本水道協会規格Ｋ１１３に従って求め
たことを意味する。The term "digestion method" in Table 3 means that it was determined in accordance with the method specified in the official compendial document for food additives.
“WWA” means that it was obtained in accordance with the Japan Water Works Association standard K113.

【００３５】表３に結果から明らかなように、Ｚｎの溶
出量は食品添加法規格値（1000ppm)および水道用活性炭
規格値（50ppm)を大きく下回るものであり、両規格に合
格する品質となっている。As is clear from the results shown in Table 3, the elution amount of Zn is much lower than the standard value (1000 ppm) of the Food Additives Act and the standard value (50 ppm) of activated carbon for water supply, and the quality passes both standards. ing.

【００３６】[0036]

【実施例１２〜１４】＊塩酸洗浄に及ぼす粒径の効果上記洗浄効果には灰分の影響も考えられるので、実施例
１（１）の賦活品を２５０μｍ（６０メッシュ）以下に
粉砕したものについて上記と同様にして塩酸洗浄試験を
行った。結果を表４に示す。Examples 12 to 14 * Effect of particle size on cleaning with hydrochloric acid Since the effect of ash may be considered in the cleaning effect, the activated product of Example 1 (1) was pulverized to 250 μm (60 mesh) or less. A hydrochloric acid cleaning test was conducted in the same manner as above. The results are shown in Table 4.

【００３７】[0037]

【表４】 [Table 4]

【００３８】上記の結果から、塩酸洗浄に供する試料は
粉砕してから行うほうが亜鉛の溶出が抑えられることが
示された。From the above results, it was shown that zinc elution can be suppressed more by crushing the sample to be washed with hydrochloric acid after crushing.

【００３９】[0039]

【実施例１５】＊液相吸着試験実施例１で得られた活性炭試料および比較品として市販
の石炭系活性炭について、液相吸着試験を行った。該試
験は、界面活性剤（ｐ−ｎ−ドデシルベンゼンスルホン
酸ナトリウム（ＤＢＳ））、フェノール、農薬類（シマ
ジン、ダイアノジン、スミチオン）の各々の稀薄水溶液
について２５℃における吸着等温線を測定することによ
り行った。具体的には、界面活性剤（ＤＢＳ）およびフ
ェノールについては日本水道協会規格（ＪＷＷＡＫ１１
３）に定める方法に準拠して行い、農薬類についても該
方法と同様の方法により行った。また、その定量は紫外
部吸収法によった。活性炭試料は２００メッシュ以下に
粉砕し、１１０℃で２時間乾燥したものを使用した。吸
着量ｑは、次式によって算出した。Example 15 * Liquid phase adsorption test A liquid phase adsorption test was carried out on the activated carbon sample obtained in Example 1 and a commercially available coal-based activated carbon as a comparative product. The test was carried out by measuring adsorption isotherms at 25 ° C. for dilute aqueous solutions of each of surfactant (sodium pn-dodecylbenzenesulfonate (DBS)), phenol, and pesticides (simazine, dianodine, sumithione). went. Specifically, regarding the surfactant (DBS) and phenol, the Japan Water Works Association standard (JWWAK11
The method was carried out according to the method defined in 3), and pesticides were also used by the same method. Moreover, the quantification was based on the ultraviolet absorption method. The activated carbon sample was used after being crushed to 200 mesh or less and dried at 110 ° C. for 2 hours. The adsorption amount q was calculated by the following formula.

【００４０】ｑ＝（Ｖ／Ｗ）・（Ｃｏ−Ｃ）式中：ｑ：＝吸着量(mg/g)、Ｖ：液量(mL)、Ｗ：活性炭重量(m
g)、Ｃｏ：初濃度(mg/L)、Ｃ：平衡濃度(mg/L)。Q = (V / W). (Co-C) In the formula: q: = adsorption amount (mg / g), V: liquid amount (mL), W: activated carbon weight (m
g), Co: initial concentration (mg / L), C: equilibrium concentration (mg / L).

【００４１】液量は１００ｍｌ、初濃度は１〜１０ｐｐ
ｍとし、活性炭量は吸着質によって適量となるように加
えた。The liquid volume is 100 ml, and the initial concentration is 1 to 10 pp.
m, and the amount of activated carbon was added so as to be an appropriate amount depending on the adsorbate.

【００４２】吸着等温試験の結果、平衡濃度と吸着量の
関係を両対数紙上に表現し、次のフロインドリッヒの吸
着等温式によりフロインドリッヒ式の定数のｋおよび１
／ｎを求めた。As a result of the adsorption isotherm test, the relation between the equilibrium concentration and the adsorption amount is expressed on a logarithmic log paper, and the Freundlich constants k and 1 are calculated by the following Freundlich adsorption isotherm.
/ N was calculated.

【００４３】フロインドリッヒの吸着等温式：ｑ＝ｋＣ^1/n ５種類の吸着質に関する２５℃における吸着等温線を図
３〜７に示す。また、吸着等温試験の結果を表５、６お
よび７Ａ〜７Ｃに示す。Freundlich's adsorption isotherm: q = kC ^{1 / n} The adsorption isotherms at 25 ° C. for 5 different adsorbates are shown in FIGS. The results of the adsorption isotherm test are shown in Tables 5, 6 and 7A to 7C.

【００４４】以上の結果から、本発明により製造される活性炭はフェ
ノールを除き市販の石炭系活性炭の１／３〜１／６の吸
着容量を有すると考えられ、フェノールに対しては市販
の石炭系活性炭に匹敵する活性を示した。これらの結果
から、本発明の方法によれば、水処理等の用途に十分使
用可能な活性炭を安価に提供できることが明らかとなっ
た。[0044] From the above results, it is considered that the activated carbon produced according to the present invention has an adsorption capacity of 1/3 to 1/6 of that of the commercially available coal-based activated carbon excluding phenol, and is equivalent to the commercially available coal-based activated carbon for phenol. Activity was shown. From these results, it became clear that the method of the present invention can provide, at a low cost, activated carbon that can be sufficiently used for applications such as water treatment.

【図面の簡単な説明】[Brief description of drawings]

【図１】賦活処理装置の概略図である。FIG. 1 is a schematic view of an activation processing device.

【図２】実施例１（１）で得た賦活試料の細孔径分布を
示すグラフである。FIG. 2 is a graph showing the pore size distribution of the activated sample obtained in Example 1 (1).

【図３】ＤＢＳの吸着等温線を示すグラフである。FIG. 3 is a graph showing an adsorption isotherm of DBS.

【図４】フェノールの吸着等温線を示すグラフである。FIG. 4 is a graph showing an adsorption isotherm of phenol.

【図５】シマジンの吸着等温線を示すグラフである。FIG. 5 is a graph showing the adsorption isotherm of simazine.

【図６】ダイアジノンの吸着等温線を示すグラフであ
る。FIG. 6 is a graph showing an adsorption isotherm of diazinon.

【図７】フェニトロチオンの吸着等温線を示すグラフで
ある。FIG. 7 is a graph showing an adsorption isotherm of fenitrothion.

【符号の説明】[Explanation of symbols]

１蒸気発生器２蒸気３熱電対４電気炉５ガス出口６試料７減速歯車 1 steam generator 2 steam 3 thermocouple 4 electric furnace 5 gas outlets 6 samples 7 Reduction gear

───────────────────────────────────────────────────── フロントページの続き (56)参考文献特開昭49−102595（ＪＰ，Ａ) 炭素材料学科編，活性炭−応用と基礎，日本，講談社，1975年11月10日, ｐ．102−106 (58)調査した分野(Int.Cl.⁷，ＤＢ名) C01B 31/00 - 31/36 ＪＩＣＳＴファイル（ＪＯＩＳ)─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-49-102595 (JP, A) Department of Carbon Materials, Activated Carbon-Application and Fundamentals, Japan, Kodansha, November 10, 1975, p. 102-106 (58) Fields investigated (Int. Cl. ⁷ , DB name) C01B 31/00-31/36 JISST file (JOIS)

Claims

(57)【特許請求の範囲】(57) [Claims]

【請求項１】廃タイヤを４５０〜５５０℃の温度で炭化
して廃タイヤ乾留チャーを得る工程、不活性ガス雰囲気
下に７００〜１０００℃で４〜８時間スチームを適用す
ることにより該チャーを活性化する工程、該チャーを２
５０μｍ（６０メッシュ）以下に粉砕する工程、粉砕さ
れたチャーを室温〜８０℃の温度下に１〜１０重量％の
塩酸溶液で処理する工程、塩酸処理された粉砕チャーを
水または希アルカリ溶液で洗浄する工程を含む活性炭の
製造方法。1. A step of carbonizing a waste tire at a temperature of 450 to 550 ° C. to obtain a waste tire dry distillation char, by applying steam under an inert gas atmosphere at 700 to 1000 ° C. for 4 to 8 hours. Step of activating, the char 2
A step of pulverizing to less than 50 μm (60 mesh), a step of treating the pulverized char with a 1-10 wt% hydrochloric acid solution at a temperature of room temperature to 80 ° C., a step of pulverizing the char treated with hydrochloric acid with water or a dilute alkaline solution. A method for producing activated carbon, comprising a step of washing.

【請求項２】活性化工程の温度が８００〜８５０℃であ
る請求項１に記載の方法。2. The method according to claim 1, wherein the temperature of the activation step is 800 to 850 ° C.

【請求項３】塩酸濃度が１〜５重量％である請求項１ま
たは２に記載の方法。3. The method according to claim 1, wherein the hydrochloric acid concentration is 1 to 5% by weight.