JPS5939372B2 - Separation and recovery method of hexavalent chromium - Google Patents
Separation and recovery method of hexavalent chromiumInfo
- Publication number
- JPS5939372B2 JPS5939372B2 JP52080677A JP8067777A JPS5939372B2 JP S5939372 B2 JPS5939372 B2 JP S5939372B2 JP 52080677 A JP52080677 A JP 52080677A JP 8067777 A JP8067777 A JP 8067777A JP S5939372 B2 JPS5939372 B2 JP S5939372B2
- Authority
- JP
- Japan
- Prior art keywords
- hexavalent chromium
- exchange resin
- ions
- anion exchange
- desorption
- 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
Description
【発明の詳細な説明】
本発明は少くともハロゲンイオンと６価クロムを含有す
る水溶液からの６価クロムの分離回収法に係り、さらに
詳しくは、該６価クロム含有水溶液からアニオン交換樹
脂を用いて実質的にハロゲンイオンを含まない６価クロ
ムを分離回収する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for separating and recovering hexavalent chromium from an aqueous solution containing at least halogen ions and hexavalent chromium. The present invention relates to a method for separating and recovering hexavalent chromium that is substantially free of halogen ions.
従来ハロゲンイオンと６価クロムを含有する水溶液の処
理法としては、還元剤を用いて６価クロムを還元して３
価クロムとなしたのち沈殿濾別するいわゆる凝集沈殿法
があるが、かかる処理法では６価クロムを有効に回収再
利用できないのみならず処理装置が大きくなる等の欠点
があり、更には生成したスラッジの処理あるいはそれに
伴う二次公害等の問題があった。Conventionally, the treatment method for aqueous solutions containing halogen ions and hexavalent chromium is to reduce hexavalent chromium using a reducing agent.
There is a so-called coagulation-sedimentation method in which hexavalent chromium is separated by precipitation and filtration after it is converted into hexavalent chromium, but this treatment method not only cannot effectively recover and reuse hexavalent chromium, but also has the disadvantage that the processing equipment becomes large. There were problems with sludge treatment and secondary pollution associated with it.
そこで本発明者らは少なくともハロゲンと６価クロムを
含む水溶液から６価クロムを有利に分離回収する方法に
ついて鋭意研究した結果、少くともハロゲンイオンと６
価クロムを含有する水溶液をアニオン交換樹脂塔に通液
（接触）したのち、該樹脂から脱着されて得られる６価
クロム含有水溶液を、再度アニオン交換樹脂塔に通液（
接触）することにより、ハロゲンイオンを実質的に含有
しない６価クロムが得られることを見出し、本発明を完
成するに至った。Therefore, the present inventors conducted intensive research on a method for advantageously separating and recovering hexavalent chromium from an aqueous solution containing at least halogen ions and hexavalent chromium.
After the aqueous solution containing valent chromium is passed through (contacted with) the anion exchange resin column, the aqueous solution containing hexavalent chromium obtained by being desorbed from the resin is passed through the anion exchange resin column again (
The present inventors have discovered that hexavalent chromium containing substantially no halogen ions can be obtained by contacting the hexavalent chromium (contact), and have completed the present invention.
本発明の方法によって回収された６価クロムは、実質的
にハロゲンイオンを含有していないので皮なめし用或い
は顔料、染料の原料として好適に使用でき、特に皮なめ
し用には本発明の方法によって初めて再利用が可能とな
るものである。Since the hexavalent chromium recovered by the method of the present invention does not substantially contain halogen ions, it can be suitably used for leather tanning or as a raw material for pigments and dyes. This is the first time that it can be reused.
省資源、無公害化の観点から本発明の効果は大きい。The present invention has great effects from the viewpoint of resource saving and pollution-free production.
本発明を更に詳しく説明する。The present invention will be explained in more detail.
本発明における少くともハロゲンイオンと６価クロムイ
オンを含有する水溶液（以下「本処理液」という）は、
他のイオンとして金属または重金属イオンのようなカチ
オン、或いは硝酸硫酸イ゛オンの如く他のアニオンを含
有していてもよい。The aqueous solution containing at least halogen ions and hexavalent chromium ions (hereinafter referred to as "this treatment liquid") in the present invention is
Other ions may include cations such as metal or heavy metal ions, or other anions such as nitrate and sulfate ions.
ハロゲンイオンとしては弗素イオン、塩素イオン、臭素
イオン、ヨウ素イオンがあげられる。Examples of halogen ions include fluorine ions, chlorine ions, bromide ions, and iodine ions.
これらを含有する本処理液としては例えば中和クロメー
トメッキ廃水等があげられる。Examples of the main treatment liquid containing these include neutralized chromate plating wastewater.
アニオン交換樹脂としては強アニオン交換樹脂、中アニ
オン交換樹脂および弱アニオン交換樹脂のいずれでも使
用することができる。As the anion exchange resin, any of strong anion exchange resins, medium anion exchange resins, and weak anion exchange resins can be used.
これらの樹脂の例としては、レバチットＭＰ−６４、レ
バチットＭＰ−６００（バイエル社製）、ダイヤイオン
ＷＡ−３０、ダイヤイオンＰＡ−３０６、ダイヤイオン
ＷＡ−１０（三菱化成製）、アンバーライトＩＲＡ−９
３、アンバーライトＩＲＡ−６８、アンバーライトＩＲ
Ａ−４５、アンバーライトＩＲＡ−９００（ロームアン
ドハース社製）、デュオライ）Ａ−３０８、デュオライ
トＡ−５７、デュオライトＡ−１０ＩＤ（ダイヤモンド
ジャムロック社製）、或いはスミキレ−）ＣＲ−２（住
友化学社製）等が挙げられる。Examples of these resins include Revatit MP-64, Revatit MP-600 (manufactured by Bayer), Diaion WA-30, Diaion PA-306, Diaion WA-10 (manufactured by Mitsubishi Kasei), Amberlite IRA- 9
3. Amberlight IRA-68, Amberlight IR
A-45, Amberlite IRA-900 (manufactured by Rohm and Haas), Duolite) A-308, Duolite A-57, Duolite A-10ID (manufactured by Diamond Jamrock), or Sumikire) CR-2 ( manufactured by Sumitomo Chemical Co., Ltd.).
このうち他のアニオン交換樹脂に比べて回収６価クロム
が高濃度で回収でき、且つアニオン交換樹脂の劣化が最
も少なく、６価クロムの交換容量が極めて大きい点を考
慮して、スミキレートＣＲ−２を使用することが好まし
い。Among these, Sumikylate CR-2 was developed in consideration of the fact that compared to other anion exchange resins, recovered hexavalent chromium can be recovered at a higher concentration, the deterioration of anion exchange resin is the least, and the exchange capacity of hexavalent chromium is extremely large. It is preferable to use
アニオン交換樹脂に通液する場合、ハロゲンの除去率を
更に高くしたい時は該アニオン交換樹脂への６価クロム
の吸着量以上の６価クロムを含有した、本処理液を通液
することが好ましい。When passing the solution through an anion exchange resin, if you want to further increase the halogen removal rate, it is preferable to pass this treatment solution containing more hexavalent chromium than the amount of hexavalent chromium adsorbed to the anion exchange resin. .
しかしながらハロゲンの除去率をさほど要求しない場合
には６価りロム吸着量以下の６価クロムを含有する本処
理液であっても充分目的を達成できる。However, if a high halogen removal rate is not required, even a treatment solution containing less than the amount of hexavalent chromium adsorbed can sufficiently achieve the objective.
６価クロム含有水溶液の液性は酸性もしくは中性である
方が好ましく、処理液がアルカリ性の場合には硫酸・塩
酸・硝酸等の鉱酸で酸性もしくは中性にする必要がある
。It is preferable that the hexavalent chromium-containing aqueous solution is acidic or neutral. If the treatment liquid is alkaline, it is necessary to make it acidic or neutral with a mineral acid such as sulfuric acid, hydrochloric acid, or nitric acid.
しかしながらアニオン交換樹脂として強アニオン交換樹
脂を用いる場合、本処理液がアルカリ性であってもよい
。However, when a strong anion exchange resin is used as the anion exchange resin, the treatment liquid may be alkaline.
本発明における脱着方法は水酸化カリウム・水酸化すｌ
−ＩＪウム・アンモニア水等のアルカリ水溶液等を通液
することにより簡単に実施でき、アルカリ濃度は０．２
〜２０％の範囲で実施でき好ましい範囲は１〜１０％で
ある。The desorption method in the present invention is potassium hydroxide/sulfur hydroxide.
- It can be easily carried out by passing an alkaline aqueous solution such as IJum or aqueous ammonia, and the alkaline concentration is 0.2.
It can be carried out in the range of -20%, and the preferred range is 1-10%.
脱着液を更にアニオン交換樹脂に通液する場合、液性を
必要に応じ中性もしくは酸性にする必要がある。When the desorption liquid is further passed through an anion exchange resin, it is necessary to make the liquid property neutral or acidic as necessary.
この時の中和剤としては硫酸、硝酸、塩酸等の鉱酸を用
いることができる。As a neutralizing agent at this time, mineral acids such as sulfuric acid, nitric acid, and hydrochloric acid can be used.
また、６価クロムは酸化性が強いので、脱着液を必要に
応じ、希釈して用いる事が出きる。Furthermore, since hexavalent chromium has strong oxidizing properties, the desorption liquid can be diluted and used as required.
脱着液を更にアニオン交換樹脂に通液させる場合、脱着
液中の６価クロム含有量がアニオン交換樹脂の６価りロ
ム吸着量に等しいか、もしくは６価りロム吸着量以上の
量を通液し、リークした６価クロムは他のアニオン交換
樹脂塔で処理することが好ましい、しかしながらアニオ
ン交換樹脂の６価りロム吸着量以下であっても、必要に
応じて目的を達成することができる。When the desorption liquid is further passed through the anion exchange resin, the content of hexavalent chromium in the desorption liquid must be equal to or greater than the adsorption amount of hexavalent chromium in the anion exchange resin. However, it is preferable to treat leaked hexavalent chromium in another anion exchange resin tower. However, even if the adsorption amount of hexavalent chromium is less than the adsorption amount of hexavalent chromium in the anion exchange resin, the objective can be achieved if necessary.
脱着液を通液し６価クロムを吸着したアニオン交換樹脂
を水洗後アルカリ性水溶液で脱着することにより、実質
的にハロゲンイオンを含有しない６価クロムが回収でき
る。By passing a desorption liquid through the resin, washing the anion exchange resin that has adsorbed hexavalent chromium with water, and then desorbing it with an alkaline aqueous solution, hexavalent chromium that does not substantially contain halogen ions can be recovered.
次に本発明を実施例で示す。Next, the present invention will be illustrated by examples.
実施例 ｌ
スミキレ−ＦＯＲ−２（アニオン交換樹脂）を１５０ｙ
ｄ充填したアニオン交換樹脂塔に６価りａムイオンとし
て５７５ｐｐｍ ならびに弗素イオンとしてＩ０００ｐ
ｐｍ０００ｐｐＨ２，８の廃水を１．５００ｃｃ／Ｈｒ
の速度で通液し、該イオン交換樹脂の６価クロムイオン
の総交換容量以上通液した時点で通液を中止し水１，５
００ｃｃ／Ｈｒの速度で通液させた。Example 1 150y of Sumikire-FOR-2 (anion exchange resin)
575 ppm as hexavalent am ions and I000 p as fluorine ions in an anion exchange resin tower filled with d.
1.500cc/Hr of wastewater with pm000pppH2.8
When the total exchange capacity of hexavalent chromium ions of the ion exchange resin is exceeded, the liquid passage is stopped and water
The liquid was passed at a rate of 00 cc/Hr.
次に４％−ＮａＯＨ水溶液を３００ｃｃ／Ｈｒの速度で
通液し該イオン交換樹脂に吸着した６価クロムイオンを
クロム酸ソーダとして脱着せしめ、脱着液を回収した。Next, a 4%-NaOH aqueous solution was passed through the resin at a rate of 300 cc/hr to desorb the hexavalent chromium ions adsorbed on the ion exchange resin as sodium chromate, and the desorbed liquid was recovered.
この脱着液は６価クロムイオン４１．０００ｐｐｍ、な
らびに弗素イオン２０６ｐｐｍを含有し通液後の廃水に
は６価クロムを全く含有せず、はぼ全量の弗素イオンを
含有していた。This desorption solution contained 41.000 ppm of hexavalent chromium ions and 206 ppm of fluorine ions, and the wastewater after passing through the solution did not contain any hexavalent chromium and contained almost the entire amount of fluorine ions.
この脱着液に水を加えて６価クロムイオン５，０００ｐ
ｐｍ にし、且つ硫酸でｐＨ２，０に調整後再生処理
したイオン交換樹脂塔に１，５００ｃｃ／Ｈｒの速度で
再流通せしめた。Add water to this desorption solution to obtain 5,000p of hexavalent chromium ions.
pm and adjusted to pH 2.0 with sulfuric acid, and then recirculated at a rate of 1,500 cc/Hr through a regenerated ion exchange resin column.
イオン交換樹脂の６価クロムの総交換容量以上通液した
時点で通液を中止し、上記と同じ条件で水洗および４％
ＮａＯＨ水溶液で脱着せしめ、脱着液を回収した。When the total exchange capacity of hexavalent chromium of the ion exchange resin is exceeded, the flow is stopped, and water is washed under the same conditions as above and 4%
Desorption was performed with an aqueous NaOH solution, and the desorption solution was collected.
この脱着液の組成は６価クロムイオン４２，８００ｐｐ
ｍに対して弗素イオン０．７ｐｐｍであった。The composition of this desorption liquid is 42,800 pp of hexavalent chromium ions.
The amount of fluorine ion was 0.7 ppm with respect to m.
実施例 ２
アンバーライ）ＩＲＡ−９３（アニオン交換樹脂）を１
５０ｒｒｌｌ充填したアニオン交換樹脂塔に６価クロム
イオン５６８ｐｐｍならびに塩素イオン５６２ ｐｐｍ
を含有するｐＨ２，０の廃水を、１，５００ｃｃ ／
Ｈｒの速度で通液し、イオン交換樹脂の６価クロムイオ
ンの総交換容量以上通液した時点で通液を中止し、水１
．５００ ｃｃ ／ Ｈｒの速度で通液させた。Example 2 1 Amberly) IRA-93 (anion exchange resin)
568 ppm of hexavalent chromium ions and 562 ppm of chlorine ions in an anion exchange resin tower filled with 50 rrll
1,500cc/of wastewater with a pH of 2.0 containing
The liquid was passed at a rate of 1 Hr, and when the total exchange capacity of hexavalent chromium ions of the ion exchange resin was exceeded, the passing of the liquid was stopped, and water was added at a rate of 1 Hr.
．． The liquid was passed through at a rate of 500 cc/Hr.
次に４％ ＮａＯＨ水溶液を３００ｃｃ／Ｈｒの速度
で通液し、該イオン交換樹脂に吸着した６価クロムイオ
ンをクロム酸ソーダとして脱着せしめ、脱着液を回収し
た。Next, a 4% NaOH aqueous solution was passed through the resin at a rate of 300 cc/hr to desorb the hexavalent chromium ions adsorbed on the ion exchange resin as sodium chromate, and the desorption solution was recovered.
この脱着液は６価クロムイオン２５３００ ｐｐｍなら
びに塩素イオン１９８ ｐｐｍ含有していた。This desorption solution contained 25,300 ppm of hexavalent chromium ions and 198 ppm of chlorine ions.
この脱着液に水を加えて６価クロムイオン５０００ ｐ
ｐｍにし、且つ硫酸でｐＨ２，０に調整後再生処理した
イオン交換樹脂塔に１５００ｃｃ／Ｈｒの速度で再流通
せしめた。Add water to this desorption solution to remove 5000 p of hexavalent chromium ions.
pm and adjusted to pH 2.0 with sulfuric acid, and then recirculated at a rate of 1500 cc/Hr through a regenerated ion exchange resin column.
イオン交換樹脂の総交換容量以上通液した時点で通液を
中止し、上記と同じ条件で水洗および４ ％ ＮａＯＨ
水溶液で脱着せしめ、脱着液を回収した。When the total exchange capacity of the ion exchange resin was exceeded, the flow was stopped, and the resin was washed with water and 4% NaOH under the same conditions as above.
Desorption was performed using an aqueous solution, and the desorption solution was collected.
この脱着液の組成は６価クロムイオン２７７００ｐｐｍ
に対して塩素イオン０．８ｐｐｍであった。The composition of this desorption liquid is 27,700 ppm of hexavalent chromium ions.
The concentration of chlorine ions was 0.8 ppm.
実施例 ３
ダイヤイオンＷＡ−３０（アニオン交換樹脂）を１５０
ＷＩＩ！充填したアニオン樹脂塔に６価クロムイオン５
９０ ｐｐｍならびによう素イオン５８０ｐｐｍを含有
するｐＨ２，０の廃水を、１，５００ｃｃ７／Ｈｒの速
度で通液し、イオン交換樹脂の６価クロムイオンの総交
換容量以上通液した時点で通液を中止し、水を１５００
ｃｃ ／Ｈｒの速度で通液させた。Example 3 Diaion WA-30 (anion exchange resin) 150
WII! Hexavalent chromium ion 5 is added to the filled anion resin column.
Wastewater with a pH of 2.0 containing 90 ppm and 580 ppm of iodine ions was passed through the tube at a rate of 1,500 cc/Hr, and the flow was stopped when the total exchange capacity of hexavalent chromium ions of the ion exchange resin was exceeded. Stop and drink 1500 ml of water.
The solution was passed at a rate of cc/Hr.
次に４％−ＮａＯＨ水溶液を３００ｃｃ／Ｈｒの速度で
通液し、該イオン交換樹脂に吸着した６価クロムイオン
をクロム酸ソーダとして脱着せしめ、脱着液を回収した
。Next, a 4%-NaOH aqueous solution was passed through the resin at a rate of 300 cc/hr to desorb the hexavalent chromium ions adsorbed on the ion exchange resin as sodium chromate, and the desorbed liquid was recovered.
この脱着液は６価クロムイオン２８５００ ｐｐｍなら
びによう素イオン２００ｐｐｍを含有していた。This desorption solution contained 28,500 ppm of hexavalent chromium ions and 200 ppm of iodine ions.
この脱着液に水を加えて６価クロムイオン５０００ｐｐ
ｍにし、且つ硫酸でｐＨ２，０に調整後、再生処理した
イオン交換樹脂塔に１５００ｃｃ／Ｈｒの速度で再流通
せしめた。Add water to this desorption solution to obtain 5000pp of hexavalent chromium ions.
After adjusting the pH to 2.0 with sulfuric acid, it was recirculated to the regenerated ion exchange resin column at a rate of 1500 cc/Hr.
イオン交換樹脂の総交換容量以上通液した時点で通液を
中止し、上記と同じ条件で水洗および４％−ＮａＯＨ水
溶液で脱着せしめ、脱着液を回収した。When the total exchange capacity of the ion exchange resin was exceeded, the liquid passage was stopped, and the resin was washed with water and desorbed with a 4% NaOH aqueous solution under the same conditions as above, and the desorbed liquid was recovered.
この脱着液の組成は６価クロムイオン２５３８０ ｐｐ
ｍに対してよう素イオン０．９ｐｐｍであった。The composition of this desorption liquid is 25,380 ppp of hexavalent chromium ions.
The amount of iodine ion was 0.9 ppm with respect to m.
実施例 ４
レバチツ）ＭＰ−６４（アニオン交換樹脂）を１５０１
ｎｌ充填したアニオン樹脂塔に６価クロムイオン５７５
ｐｐｍならびに弗素イオン５７８ｐｐｍを含有するｐ
Ｈ２，０の廃水を、１５００ｃｃ／Ｈｒの速度で通液し
、イオン交換樹脂の６価クロムイオンの総交換容量以上
通液した時点で通液を中止し、水を１５００ｃｃ／Ｈｒ
の速度で通液させた。Example 4 MP-64 (anion exchange resin) was added to 1501
Hexavalent chromium ion 575 in an anion resin tower filled with nl
p containing 578 ppm and 578 ppm of fluoride ions.
H2,0 wastewater was passed through at a rate of 1500cc/Hr, and when the total exchange capacity of hexavalent chromium ions of the ion exchange resin was exceeded, the flow was stopped, and water was passed through at a rate of 1500cc/Hr.
The liquid was passed at a speed of .
次に４％−ＮａＯＨ水溶液を３００ｃｃ／Ｈｒの速度で
通液し、該イオン交換樹脂に吸着した６価クロムイオン
をクロム酸ソーダとして脱着せしめ、脱着液を回収した
。Next, a 4%-NaOH aqueous solution was passed through the resin at a rate of 300 cc/hr to desorb the hexavalent chromium ions adsorbed on the ion exchange resin as sodium chromate, and the desorbed liquid was recovered.
この脱着液は６価クロムイオン２８２００ ｐｐｍなら
びに弗素イオン１８５ ｐｐｍを含有していた。This desorption solution contained 28,200 ppm of hexavalent chromium ions and 185 ppm of fluorine ions.
この脱着液に水を加えて６価クロムイオン５０００ ｐ
ｐｍにし、且つ硫酸でｐＨ２，０に調整後、再生処理し
たイオン交換樹脂塔に１５００ ｃｃ／Ｈｒの速度で再
流通せしめた。Add water to this desorption solution to remove 5000 p of hexavalent chromium ions.
After adjusting the pH to 2.0 with sulfuric acid, the mixture was recirculated to a regenerated ion exchange resin column at a rate of 1500 cc/Hr.
イオン交換樹脂の総交換容量以上通液した時点で通液を
中止し、上記と同じ条件で水洗および４％−ＮａＯＨで
脱着せしめ、脱着液を回収した。When the total exchange capacity of the ion exchange resin was exceeded, the flow of liquid was stopped, and the resin was washed with water and desorbed with 4% NaOH under the same conditions as above, and the desorption liquid was recovered.
この脱着液の組成は６価クロムイオン２８２００ ｐｐ
ｍに対して弗素イオン５．３ｐｐｍであった。The composition of this desorption liquid is 28,200 ppp of hexavalent chromium ions.
The amount of fluorine ion was 5.3 ppm with respect to m.
実施例 ５
デュオライ）Ａ−１０ＩＤ（アニオン交換樹脂）をＩ
５０ｍ充填したアニオン交換樹脂塔に６価クロムイオン
５７５ｐｐｍ１弗素イオン５７８ ｐｐｍを含有するｐ
Ｈ２，０の廃水を１５００ｃｃ／Ｈｒの速度で通液しイ
オン交換樹脂の６価クロムイオンの総交換容量以上通液
した時点で通液を中止し水を１５００ ｃｃ／Ｈｒの速
度で通液させた。Example 5 Duoly) A-10ID (anion exchange resin)
P containing 575 ppm of hexavalent chromium ions, 1 fluoride ions of 578 ppm in an anion exchange resin column filled with 50 m
H2,0 wastewater was passed at a rate of 1500 cc/Hr, and when the total exchange capacity of hexavalent chromium ions of the ion exchange resin was exceeded, the flow was stopped and water was passed at a rate of 1500 cc/Hr. Ta.
次に４係−ＮａＯＨ水溶液を３００ ｃｃ ／ Ｈｒの
速度で通液し、該イオン交換樹脂に吸着した６価クロム
イオンをクロム酸ソーダとして脱着せしめ脱着液を回収
した。Next, a 4-NaOH aqueous solution was passed through the resin at a rate of 300 cc/Hr to desorb the hexavalent chromium ions adsorbed on the ion exchange resin as sodium chromate, and a desorption solution was recovered.
この脱着液は６価クロムイオン１６５００ｐｐｍ弗素イ
オンｌＩ２ｐｐｍ含有していた。This desorption solution contained 16,500 ppm of hexavalent chromium ions and 2 ppm of fluorine ions.
この脱着液に水を加えて６価クロムイオン５０００ｐｐ
ｍにし、且つ硫酸でｐＨ２，０に調整後、再生処理した
イオン交換樹脂塔に１５００ｃｃ／Ｈｒの速度で再流通
せしめた。Add water to this desorption solution to obtain 5000pp of hexavalent chromium ions.
After adjusting the pH to 2.0 with sulfuric acid, it was recirculated to the regenerated ion exchange resin column at a rate of 1500 cc/Hr.
イオン交換樹脂の総交換容量以上通液した時点で通液を
中止し、上記と同じ条件で水洗および４％−１’ＪａＯ
Ｈで脱着せしめ、脱着液を回収した。When the total exchange capacity of the ion exchange resin is exceeded, the flow is stopped and washed with water under the same conditions as above.
It was desorbed with H and the desorption solution was collected.
この脱着液の組成は６価クロムイオン１２５００ｐｐｍ
に対して弗素イオン１．５ｐｐｍであった。The composition of this desorption liquid is 12,500 ppm of hexavalent chromium ions.
The fluorine ion concentration was 1.5 ppm.
Claims (1)
水溶液から、イオン交換樹脂を用いて６価クロムを分離
回収する方法において、該６価クロム含有水溶液をアニ
オン交換樹脂と接触せしめたのち該アニオン交換樹脂を
脱着処理し、得られた脱着液を更にアニオン交換樹脂と
接触せしめ、脱着処理して脱着液を回収することからな
る６価クロムの分離回収法。 ２ アニオン交換樹脂が弱塩基性イオン交換樹脂である
特許請求の範囲第１項記載の方法。 ３、少なくともハロゲンイオンと６価クロムを含有する
水溶液中もしくは脱着液中の６価クロムの含有量が、ア
ニオン交換樹脂の６価りロム総吸着量以上である特許請
求の範囲第１項または第２項記載の方法。 ４ ハロゲンイオンが弗素イオンである特許請求の範囲
第１項、第２項または第３項ｇｅ載の方法。[Claims] 1. In a method for separating and recovering hexavalent chromium from an aqueous solution containing at least halogen ions and hexavalent chromium using an ion exchange resin, the hexavalent chromium-containing aqueous solution is brought into contact with an anion exchange resin. A method for separating and recovering hexavalent chromium, which comprises subsequently subjecting the anion exchange resin to a desorption process, bringing the resulting desorption liquid into contact with an anion exchange resin, performing a desorption process, and recovering the desorption liquid. 2. The method according to claim 1, wherein the anion exchange resin is a weakly basic ion exchange resin. 3. The content of hexavalent chromium in the aqueous solution containing at least halogen ions and hexavalent chromium or in the desorption liquid is greater than or equal to the total amount of hexavalent chromium adsorbed by the anion exchange resin. The method described in Section 2. 4. The method according to claim 1, 2 or 3ge, wherein the halogen ion is a fluorine ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52080677A JPS5939372B2 (en) | 1977-07-05 | 1977-07-05 | Separation and recovery method of hexavalent chromium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52080677A JPS5939372B2 (en) | 1977-07-05 | 1977-07-05 | Separation and recovery method of hexavalent chromium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5414396A JPS5414396A (en) | 1979-02-02 |
| JPS5939372B2 true JPS5939372B2 (en) | 1984-09-22 |
Family
ID=13724975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52080677A Expired JPS5939372B2 (en) | 1977-07-05 | 1977-07-05 | Separation and recovery method of hexavalent chromium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5939372B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1014601C2 (en) * | 2000-03-10 | 2001-09-11 | Ferro Techniek Bv | Heating element, liquid container and method for detecting temperature changes. |
| CN102260020A (en) * | 2011-05-27 | 2011-11-30 | 河南省科学院化学研究所有限公司 | Deep processing method of leather production biochemical tail water with resin adsorption method |
| CN102897837A (en) * | 2012-11-06 | 2013-01-30 | 北京理工大学 | Method for separating high-concentration K2Cr2O7 from saturated NaCl solution |
-
1977
- 1977-07-05 JP JP52080677A patent/JPS5939372B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5414396A (en) | 1979-02-02 |
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