JP2002121622A - Method for recovering valuable metal from plating waste solution - Google Patents
Method for recovering valuable metal from plating waste solutionInfo
- Publication number
- JP2002121622A JP2002121622A JP2000317741A JP2000317741A JP2002121622A JP 2002121622 A JP2002121622 A JP 2002121622A JP 2000317741 A JP2000317741 A JP 2000317741A JP 2000317741 A JP2000317741 A JP 2000317741A JP 2002121622 A JP2002121622 A JP 2002121622A
- Authority
- JP
- Japan
- Prior art keywords
- plating waste
- plating
- waste liquid
- valuable metals
- metal
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Removal Of Specific Substances (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Physical Water Treatments (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、めっき廃液からそ
れに含まれる有価金属を回収する方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering valuable metals contained in plating wastewater from the wastewater.
【０００２】[0002]
【従来技術】電気めっき、無電解めっき等は多くの分野
で利用され、年々めっき廃液の排出量が増加している。
めっき工場から排出されるめっき廃液は、長い間海洋投
棄が行われてきたが、海洋投棄の禁止に伴い、産業廃棄
物として適切な処理が要求されており、めっき廃液の大
部分は石灰中和法等によりスラッジとして処理され、埋
め立て地等に廃棄されている。しかし、めっき廃液の新
しい処理法および再利用法の開発が期待されている。ま
た、めっき廃液からそれに含まれる有価金属を効率よく
回収することは、資源の有効利用ならびにめっきコスト
低減のためにも重要である。2. Description of the Related Art Electroplating, electroless plating and the like are used in many fields, and the amount of plating wastewater discharged is increasing year by year.
Plating wastewater discharged from plating plants has long been dumped in the ocean, but due to the ban on ocean dumping, appropriate treatment as industrial waste is required, and most of the plating wastewater is lime neutralized. It is treated as sludge by law and disposed of in landfills. However, development of a new treatment method and a recycling method for plating waste liquid is expected. Efficient recovery of valuable metals contained in plating wastewater is also important for effective use of resources and reduction of plating cost.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、めっき廃液
からそれに含まれる有価金属を簡便な方法で効率よく、
かつ経済的に分離回収することをその課題とする。SUMMARY OF THE INVENTION According to the present invention, a valuable metal contained in a plating waste liquid is efficiently removed from the plating waste liquid by a simple method.
Another object is to separate and collect economically.
【０００４】[0004]
【課題を解決するための手段】本発明者は、前記課題を
解決すべく鋭意研究を重ねた結果、有価金属を含むめっ
き廃液にアセトンを一定量添加すると金属を含む濃縮水
相とアセトンを含む水相の２液相に分相することを見い
だし、また、エタノールの場合は、エタノールの添加量
が一定量を越えると均一溶液から金属の析出が始まり、
エタノールの添加量が増加するにつれて金属の析出率が
高くなることを見いだし、本発明を完成するに至った。
即ち、本発明によれば、第一に、めっき廃液からそれに
含まれる有価金属を回収する方法において、めっき廃液
にアセトンを接触させ、有価金属を含む濃縮水相（下
層）とアセトンを含む水相（上層）に分相し、該濃縮水
相から有価金属を回収することを特徴とする方法が提供
される。第二に、第一の回収方法において、アセトンの
使用量が、めっき廃液に対して１〜１０倍量（容量）で
あることを特徴とする有価金属の回収方法が提供され
る。第三に、めっき廃液からそれに含まれる有価金属を
回収する方法において、めっき廃液にエタノールを接触
させて、有価金属を晶析させ、ついで該有価金属を回収
することを特徴とする方法が提供される。第四に、第三
の回収方法において、エタノールの使用量が、めっき廃
液に対して１〜１０倍量（容量）であることを特徴とす
る有価金属の回収方法が提供される。第五に、第一乃至
第四何れか記載の回収方法において、有価金属がニッケ
ル、コバルト、銅、亜鉛、金及び銀から選ばれるめっき
に使用される少なくとも一種の金属であることを特徴と
する有価金属の回収方法が提供される。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has found that when a certain amount of acetone is added to a plating waste solution containing valuable metals, a concentrated aqueous phase containing metals and acetone are contained. In the case of ethanol, precipitation of metal from a homogeneous solution starts when the amount of ethanol exceeds a certain amount.
The inventors have found that the rate of metal deposition increases as the amount of ethanol added increases, and have completed the present invention.
That is, according to the present invention, first, in a method of recovering valuable metal contained in plating waste liquid from a plating waste liquid, acetone is brought into contact with the plating waste liquid to form a concentrated aqueous phase (lower layer) containing valuable metal and an aqueous phase containing acetone. (Upper layer), and recovering valuable metals from the concentrated aqueous phase. Secondly, there is provided a method for recovering valuable metals, wherein the amount of acetone used in the first recovery method is 1 to 10 times (volume) the plating waste liquid. Third, there is provided a method of recovering valuable metals contained in a plating waste liquid from the plating waste liquid, wherein ethanol is brought into contact with the plating waste liquid to crystallize valuable metals, and then the valuable metals are recovered. You. Fourthly, in the third recovery method, there is provided a method for recovering valuable metals, wherein the amount of ethanol used is 1 to 10 times (volume) the plating waste liquid. Fifth, in the recovery method according to any one of the first to fourth aspects, the valuable metal is at least one metal used for plating selected from nickel, cobalt, copper, zinc, gold, and silver. A method for recovering valuable metals is provided.
【０００５】[0005]
【発明の実施の形態】本発明のめっき排液からの有価金
属の回収方法の一つは、（１）有価金属を含むめっき廃
液にアセトンを接触させて該有価金属を濃縮させて回収
するものであり、他の一つは、（２）有価金属を含むめ
っき廃液にエタノールを接触させて該有価金属を晶析さ
せて回収するものである。以下、これらの回収方法を説
明する。なお、本発明でいう、「有価金属」には、金属
単体のみならず金属化合物例えば金属塩等も包含され
る。BEST MODE FOR CARRYING OUT THE INVENTION One of the methods for recovering valuable metals from plating effluent of the present invention is as follows: (1) A method in which acetone is brought into contact with plating waste liquid containing valuable metals to concentrate and recover the valuable metals. The other is (2) a method in which ethanol is brought into contact with a plating waste liquid containing a valuable metal to crystallize and collect the valuable metal. Hereinafter, these collecting methods will be described. In the present invention, the “valuable metal” includes not only a simple metal but also a metal compound such as a metal salt.
【０００６】（１）有価金属の濃縮回収方法 本発明の有価金属の濃縮方法は、（ａ）めっき廃液にア
セトンを接触させ、有価金属を含む濃縮水相とアセトン
を含む水相に分相する工程と、（ｂ）該濃縮水相から有
価金属を回収する工程ことからなる。工程（ａ）におい
て、めっき廃液に接触させるアセトンの使用量は、通
常、めっき廃液に対して１〜１０倍量（容量）であり、
好ましくは２〜６倍量（容量）である。アセトンを添加
する温度に特別な制限はないが、好ましくは常温が採用
される。また、その濃縮時間に制限はないが、１０〜２
０分間度の短時間で十分に濃縮される。工程（ｂ）は、
下層に濃縮された有価金属濃縮水相と上層のアセトンを
含む水相の２液相から、下層の金属濃縮相をカラム法な
どにより分離し、下層から有価金属を回収することから
なる。(1) Method for Concentrating and Recovering Valuable Metal The method for concentrating valuable metal according to the present invention comprises the steps of (a) bringing acetone into contact with a plating waste solution to separate into a concentrated aqueous phase containing valuable metal and an aqueous phase containing acetone; And (b) recovering valuable metals from the concentrated aqueous phase. In the step (a), the amount of acetone to be brought into contact with the plating waste liquid is usually 1 to 10 times (volume) the plating waste liquid.
Preferably, the amount is 2 to 6 times (volume). There is no particular limitation on the temperature at which acetone is added, but normal temperature is preferably employed. Further, the concentration time is not limited,
It is concentrated sufficiently in a short time of about 0 minutes. Step (b) comprises:
The method comprises separating the lower metal-enriched phase by a column method or the like from the two liquid phases of the valuable metal-enriched aqueous phase concentrated in the lower layer and the upper aqueous phase containing acetone, and recovering the valuable metal from the lower layer.
【０００７】（２）有価金属の晶析回収方法 本発明の有価金属の晶析工程は、めっき廃液にエタノー
ルを接触させて、有価金属を晶析させ回収することから
なる。めっき廃液に接触させるエタノールの使用量は、
該めっき廃液から有価金属が析出するに足る量であれば
よく、通常、めっき廃液に対して１〜１０倍量（容量）
であり、好ましくは２〜６倍量（容量）である。エタノ
ールを添加する温度に特別な制限はないが、好ましくは
常温が採用される。また、その濃縮時間に制限はない
が、１０〜２０分程度の短時間で十分に析出される。(2) Method of Crystallizing and Recovering Valuable Metal The crystallization step of the valuable metal of the present invention comprises contacting ethanol with a plating waste solution to crystallize and recover the valuable metal. The amount of ethanol used to contact the plating waste solution is
Any amount may be used as long as valuable metals are precipitated from the plating waste liquid, and usually 1 to 10 times (volume) the plating waste liquid.
, Preferably 2 to 6 times (volume). There is no particular limitation on the temperature at which ethanol is added, but normal temperature is preferably employed. The concentration time is not limited, but is sufficiently precipitated in a short time of about 10 to 20 minutes.
【０００８】本発明のめっき廃液からの有価金属の回収
方法は、電気めっき、無電解めっき等のあらゆるめっき
廃液に適用でき、有価金属としてはめっきに使用された
有価金属の全てが対象とされる。これらの有価金属とし
ては、たとえば、ニッケル、コバルト、銅、亜鉛、クロ
ム、金、銀等が挙げられる。The method for recovering valuable metals from plating waste solution of the present invention can be applied to all plating waste solutions such as electroplating and electroless plating, and all valuable metals used for plating are applicable as valuable metals. . Examples of these valuable metals include nickel, cobalt, copper, zinc, chromium, gold, silver and the like.
【０００９】本発明の方法において、めっき廃液から回
収された有価金属は、金属生産の原材料等として利用で
きるが、資源の有効利用の観点からみて、めっき液の金
属調製用あるいはめっき浴への金属補充用として再使用
することが好ましい。In the method of the present invention, the valuable metal recovered from the plating waste solution can be used as a raw material for metal production, etc., but from the viewpoint of effective utilization of resources, the metal for the preparation of the plating solution or the metal in the plating bath is used. It is preferable to reuse it for replenishment.
【００１０】[0010]
【実施例】次に本発明を実施例によりさらに詳細に説明
する。試料溶液と有機溶媒の接触は振とう機により２８
０ｓｐｍで所定時間振とうして行った。 実施例１ ニッケル濃度５．２ｇ／ｄｍ３、リン濃度４６．８ｇ／
ｄｍ３、硫酸イオン濃度２８．２ｇ／ｄｍ３を含むめっ
き廃液に、アセトンの添加量（容積）比、アセトン
（Ｏ）／試料溶液（Ａ）が、１，２，３，４および５に
なるように常温において添加し、１０分間振とうしたと
きの下層のニッケル濃縮相へのニッケルの濃縮率はそれ
ぞれ９５．６％、９８．０％、９８．８％、９９．３％
および９９．５％でＯ／Ａが５での体積は試料溶液の４
８％となり、ニッケル濃度は２倍以上となった。Next, the present invention will be described in more detail with reference to examples. The contact between the sample solution and the organic solvent was performed using a shaker.
The shaking was performed at 0 spm for a predetermined time. Example 1 Nickel concentration 5.2 g / dm 3 , phosphorus concentration 46.8 g /
Amount of acetone (O) / sample solution (A) becomes 1, 2, 3, 4 and 5 to the plating waste liquid containing dm 3 and sulfate ion concentration of 28.2 g / dm 3. At room temperature and shaken for 10 minutes, the concentration of nickel in the lower nickel concentrated phase is 95.6%, 98.0%, 98.8%, 99.3%, respectively.
And the volume at 59.5 O / A at 99.5% is 4% of the sample solution.
8%, and the nickel concentration was more than doubled.
【００１１】実施例２ コバルト濃度１．５２ｇ／ｄｍ３、硫酸イオン３８．１
ｇ／ｄｍ３を含むめっき排液に、アセトンを有機相
（Ｏ）／水相（Ａ）比が、１，２，３，４および５にな
るように常温において添加し、１０分間振とうしたとき
の下層のコバルトの濃縮相の体積は、試料溶液の体積の
３９％、３５％、２４％、２０％および１８％となり、
濃縮相へのコバルトの濃縮率は８８％、９６％、９８
％、９９％および９９％であり、Ｏ／Ａが５での濃縮相
のコバルトの濃度は５．６倍であった。Example 2 Cobalt concentration 1.52 g / dm 3 , sulfate ion 38.1
Acetone was added to the plating effluent containing g / dm 3 at room temperature so that the organic phase (O) / water phase (A) ratio was 1, 2, 3, 4, and 5, and the mixture was shaken for 10 minutes. The volume of the concentrated phase of cobalt in the lower layer is 39%, 35%, 24%, 20% and 18% of the volume of the sample solution,
The concentration ratio of cobalt in the concentrated phase is 88%, 96%, 98%
%, 99% and 99%, and the concentration of cobalt in the concentrated phase at O / A of 5 was 5.6 times.
【００１２】実施例３ 銅濃度４．８ｇ／ｄｍ３を含むめっき廃液に、アセトン
を有機相（Ｏ）／水相（Ａ）比が、５になるように常温
において添加し、１０分間振とうしたときの銅の濃縮率
は９９％であった。Example 3 Acetone was added to a plating waste liquid containing a copper concentration of 4.8 g / dm3 at room temperature so that the ratio of organic phase (O) / water phase (A) became 5, and the mixture was shaken for 10 minutes. The copper concentration at that time was 99%.
【００１３】実施例４ ニッケル濃度５．２ｇ／ｄｍ３を含むめっき廃液に、エ
タノール（Ｏ）／水相（Ａ）比が、１，２，３，４およ
び５になるように常温において添加し、５分間振とうし
たときのニッケルの析出率はそれぞれ８２．６％、８
６．２％、９３．８％、９８．６％および９９．８％で
あった。EXAMPLE 4 A plating waste solution containing a nickel concentration of 5.2 g / dm 3 was added at room temperature so that the ethanol (O) / water phase (A) ratio became 1, 2, 3, 4 and 5. The nickel deposition rates after shaking for 5 minutes were 82.6% and 8%, respectively.
6.2%, 93.8%, 98.6% and 99.8%.
【００１４】実施例５ コバルト濃度１．５２ｇ／ｄｍ３を含むめっき廃液に、
エタノール（Ｏ）／水相（Ａ）比、２，４，６および８
になるように常温において添加し、５分間振とうしたと
きのニッケルの析出率はそれぞれ９２．１％、９９．３
％、９９．５％、および９９．５％であり、エタノール
添加量比が４以上では９９％以上が得られた。Example 5 A plating waste solution containing a cobalt concentration of 1.52 g / dm 3 was prepared as follows:
Ethanol (O) / water phase (A) ratio, 2, 4, 6, and 8
At room temperature and shaken for 5 minutes. The nickel deposition rates were 92.1% and 99.3%, respectively.
%, 99.5%, and 99.5%, and 99% or more was obtained when the ratio of the amount of ethanol added was 4 or more.
【００１５】実施例６ 銅濃度４．８ｇ／ｄｍ３を含むめっき廃液に、エタノー
ル（Ｏ）／水相（Ａ）比５になるように常温において添
加し、５分間振とうしたときの銅の析出率は９９．６％
であった。Example 6 Copper was added to a plating waste solution containing a copper concentration of 4.8 g / dm3 at room temperature so as to have an ethanol (O) / water phase (A) ratio of 5 and shaken for 5 minutes. The rate is 99.6%
Met.
【００１６】[0016]
【発明の効果】本発明の、めっき廃液からの特定な有機
溶媒による濃縮または晶析による有価金属の回収方法
は、操作が簡便で、反応時間が短く、また有機溶媒の再
利用が可能であり、省エネ・経済的にも優れた長所を持
っている。また、回収された有価金属は、めっき浴の金
属の補充用に使用することが可能であることから、資源
の有効利用に寄与すると共にめっきコストを大幅に低減
することができる。According to the method of the present invention for recovering valuable metals from a plating waste solution by concentration or crystallization with a specific organic solvent, the operation is simple, the reaction time is short, and the organic solvent can be reused. It has advantages in energy saving and economical. Further, since the recovered valuable metal can be used for replenishment of the metal in the plating bath, it is possible to contribute to the effective use of resources and greatly reduce the plating cost.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０１Ｇ 51/00 Ｃ０１Ｇ 53/00 Ｂ 53/00 Ｃ０２Ｆ 1/26 Ｃ Ｃ０２Ｆ 1/26 1/62 Ｃ 1/62 Ｚ Ｃ２２Ｂ 7/00 Ｇ Ｃ２２Ｂ 3/44 19/30 7/00 3/00 Ｊ 11/00 Ｔ 15/00 11/04 19/30 15/12 23/00 23/04 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C01G 51/00 C01G 53/00 B 53/00 C02F 1/26 C C02F 1/26 1/62 C 1 / 62 Z C22B 7/00 G C22B 3/44 19/30 7/00 3/00 J 11/00 T 15/00 11/04 19/30 15/12 23/00 23/04
Claims (5)
回収する方法において、めっき廃液にアセトンを接触さ
せ、有価金属を含む濃縮水相とアセトンを含む水相に分
相し、該濃縮水相から有価金属を回収することを特徴と
する方法。In a method for recovering valuable metals contained in a plating waste solution, acetone is brought into contact with the plating waste solution to separate into a concentrated aqueous phase containing valuable metals and an aqueous phase containing acetone. A method for recovering valuable metals.
１〜１０倍量（容量）であることを特徴とする請求項１
記載の有価金属の回収方法。2. The amount of acetone used is 1 to 10 times the volume (volume) of the plating waste liquid.
The method for collecting valuable metals described in the above.
回収する方法において、めっき廃液にエタノールを接触
させて、有価金属を晶析させ、ついで該有価金属を回収
することを特徴とする方法。3. A method for recovering a valuable metal contained in a plating waste liquid from a plating waste liquid, wherein ethanol is brought into contact with the plating waste liquid to crystallize the valuable metal, and then the valuable metal is recovered.
て１〜１０倍量（容量）であることを特徴とする請求項
３記載の有価金属の回収方法。4. The method for recovering valuable metals according to claim 3, wherein the amount of ethanol used is 1 to 10 times (volume) the plating waste liquid.
鉛、金、銀から選ばれる少なくとも一種の金属であるこ
とを特徴とする請求項１乃至４何れか記載の有価金属の
回収方法。5. The method according to claim 1, wherein the valuable metal is at least one metal selected from nickel, cobalt, copper, zinc, gold, and silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000317741A JP2002121622A (en) | 2000-10-18 | 2000-10-18 | Method for recovering valuable metal from plating waste solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000317741A JP2002121622A (en) | 2000-10-18 | 2000-10-18 | Method for recovering valuable metal from plating waste solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002121622A true JP2002121622A (en) | 2002-04-26 |
Family
ID=18796479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000317741A Pending JP2002121622A (en) | 2000-10-18 | 2000-10-18 | Method for recovering valuable metal from plating waste solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002121622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101733528B1 (en) * | 2015-02-23 | 2017-05-08 | 주식회사 이알메탈 | Acid purification method from waste acid |
-
2000
- 2000-10-18 JP JP2000317741A patent/JP2002121622A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101733528B1 (en) * | 2015-02-23 | 2017-05-08 | 주식회사 이알메탈 | Acid purification method from waste acid |
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