JPH0128629B2 - - Google Patents
Info
- Publication number
- JPH0128629B2 JPH0128629B2 JP60141900A JP14190085A JPH0128629B2 JP H0128629 B2 JPH0128629 B2 JP H0128629B2 JP 60141900 A JP60141900 A JP 60141900A JP 14190085 A JP14190085 A JP 14190085A JP H0128629 B2 JPH0128629 B2 JP H0128629B2
- Authority
- JP
- Japan
- Prior art keywords
- copper
- complexing agent
- added
- hydrogen peroxide
- treated water
- 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
- 239000010949 copper Substances 0.000 claims description 58
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 56
- 229910052802 copper Inorganic materials 0.000 claims description 56
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 26
- 239000008139 complexing agent Substances 0.000 claims description 20
- 238000007747 plating Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 17
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- 239000002699 waste material Substances 0.000 claims description 14
- JJLJMEJHUUYSSY-UHFFFAOYSA-L Copper hydroxide Chemical compound [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 claims description 7
- 239000005750 Copper hydroxide Substances 0.000 claims description 7
- 229910001956 copper hydroxide Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 230000001376 precipitating effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000011790 ferrous sulphate Substances 0.000 description 10
- 235000003891 ferrous sulphate Nutrition 0.000 description 10
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 10
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 9
- 239000002351 wastewater Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 229910000365 copper sulfate Inorganic materials 0.000 description 6
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 6
- 239000011734 sodium Substances 0.000 description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 5
- 239000000920 calcium hydroxide Substances 0.000 description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 4
- 230000000536 complexating effect Effects 0.000 description 4
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000009713 electroplating Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- -1 ferrous compound Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 231100000676 disease causative agent Toxicity 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、化学銅めつき工程から排出される化
学銅めつき浴液の老廃液や洗浄液中の銅の除去方
法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for removing copper from waste chemical copper plating bath liquid and cleaning liquid discharged from a chemical copper plating process.
従来の技術
錯化剤、特にEDTAを含むめつき廃液中の銅
を除去する方法としては、従来、酸性条件下で第
一鉄化合物を添加し、廃液中の第二銅を第一銅に
還元した後、PH９以上で水酸化銅として析出させ
る方法、水酸化カルシウムを銅に対して１〜７モ
ル添加し、水酸化銅として析出させる方法等が知
られている。Conventional technology The conventional method for removing copper from plating waste liquid containing a complexing agent, especially EDTA, is to add a ferrous compound under acidic conditions to reduce cupric iron in the waste liquid to cuprous. After that, a method in which copper hydroxide is precipitated at a pH of 9 or higher, and a method in which 1 to 7 mol of calcium hydroxide is added to copper to precipitate copper hydroxide are known.
発明が解決しようとする問題点
これらの方法は、銅を除去する目的は一応達成
できるが、錯化剤の能力が失われずに存在してい
るという欠点を有する。Problems to be Solved by the Invention Although these methods can achieve the purpose of removing copper, they have the disadvantage that the ability of the complexing agent remains intact.
一般に、めつき工場においては、電気めつきと
化学めつきを併用しており、電気めつき系の廃水
量に対して化学めつき系の廃水量は極めて少量で
ある。しかし、銅濃度が高く、かつ錯化剤として
のEDTAは有機物であるため、CODの原因物質
であり、他系統の廃水と混合し、別のCOD除去
装置で混合処理されている。そのため、化学銅め
つき廃液から銅を除去しても、錯化剤の能力が現
存する場合、他のめつき系の廃水と混合したとき
に、再び他の金属と錯体を形成し、他の金属の除
去効果を著しく悪化させるばかりでなく、COD
の高い廃水となつて後段の処理装置に流入するこ
とになる。 Generally, in a plating factory, both electroplating and chemical plating are used, and the amount of wastewater from chemical plating is extremely small compared to the amount of wastewater from electroplating. However, since the copper concentration is high and EDTA as a complexing agent is an organic substance, it is a causative agent of COD, and is mixed with wastewater from other systems and treated in a separate COD removal device. Therefore, even if copper is removed from chemical copper plating wastewater, if the ability of the complexing agent is still present, when it is mixed with wastewater from other plating systems, it will again form complexes with other metals and produce other metals. Not only does it significantly deteriorate the metal removal effect, but also COD
The resulting wastewater flows into the downstream treatment equipment.
従つて、本発明は、前記の問題点を解消し、銅
を除去すると共に、錯化剤の錯化能力を消失さ
せ、後段の処理装置を効果的に機能させることの
できる化学銅めつき廃液中の銅の除去方法を提供
することを目的とする。 Therefore, the present invention solves the above-mentioned problems, and provides a chemical copper plating waste liquid that can remove copper and eliminate the complexing ability of the complexing agent, so that the subsequent processing equipment can function effectively. The purpose of the present invention is to provide a method for removing copper in the present invention.
問題点を解決するための手段及び作用
本発明は、過酸化水素と第一鉄化合物を用いて
錯化剤を酸化分解した後、遊離した銅を水酸化物
として析出させることによつて前記の問題点を解
決したものである。Means and Effects for Solving the Problems The present invention solves the above problems by oxidatively decomposing the complexing agent using hydrogen peroxide and a ferrous compound, and then precipitating the liberated copper as a hydroxide. This solves the problem.
即ち、本発明による化学銅めつき廃液中の銅の
除去方法は、該廃液に過酸化水素及び第一鉄塩を
添加して錯化剤を酸化分解し、その後、遊離した
銅を水酸化銅として析出させ、分離することを特
徴とする。 That is, the method for removing copper from a chemical copper plating waste solution according to the present invention involves adding hydrogen peroxide and a ferrous salt to the waste solution to oxidize and decompose the complexing agent, and then converting the liberated copper into copper hydroxide. It is characterized by being precipitated and separated as
第一鉄塩としては、硫酸第一鉄を使用するのが
好ましい。 As ferrous salt it is preferred to use ferrous sulfate.
本発明方法においては、まず、錯化剤を酸化分
解し、錯体を形成していた銅を遊離の銅にするた
め、過酸化水素及び第一鉄塩を添加する。この分
解反応時の条件を検討するため、Cuを13.3mg/、
EDTA2ナトリウム（Na2Y）を130mg/含む、
CODMo94.5mg/の化学銅めつき廃液を使用し、
過酸化水素を錯化剤であるEDTA2ナトリウム
（Na2Y）に対して重量比で1.2倍、硫酸第一鉄を
過酸化水素中の酸素に対して重量比で５倍添加
し、PHを変化させ、処理水の銅濃度を測定し、第
１図に示した結果を得た。この結果から、本発明
方法において、錯化剤の分解工程は、PH３〜５で
行うのが好ましいことが判つた。 In the method of the present invention, first, hydrogen peroxide and a ferrous salt are added in order to oxidatively decompose the complexing agent and convert the complexed copper into free copper. In order to study the conditions for this decomposition reaction, Cu was added at 13.3mg/
Contains 130mg/disodium EDTA (Na 2 Y),
Using chemical copper plating waste liquid with COD Mo 94.5mg/,
Hydrogen peroxide was added at a weight ratio of 1.2 times the complexing agent disodium EDTA (Na 2 Y), and ferrous sulfate was added at a weight ratio of 5 times the oxygen in hydrogen peroxide to change the pH. The copper concentration of the treated water was measured, and the results shown in FIG. 1 were obtained. From this result, it was found that in the method of the present invention, the decomposition step of the complexing agent is preferably carried out at a pH of 3 to 5.
次に、本発明方法において、PH３で、過酸化水
素中の酸素に対する第一鉄の比〔Fe2+／H2O2（０
として）〕を変化させ、処理水の銅濃度を測定し
たところ、第２図に示した結果を得た。第２図か
ら、Fe2+／H2O2（０として）＝５〜６であるのが
好適であることが判つた。 Next, in the method of the present invention, the ratio of ferrous iron to oxygen in hydrogen peroxide [Fe 2+ /H 2 O 2 (0
When the copper concentration of the treated water was measured by varying the copper concentration (as shown in Fig. 2), the results shown in Figure 2 were obtained. From FIG. 2, it was found that Fe 2+ /H 2 O 2 (assumed to be 0) = 5 to 6 is suitable.
上記の検討結果から得られた条件PH３、
Fe2+／H2O2（０として）＝５で、銅めつき廃液中
のEDTA2ナトリウムに対し、過酸化水素の添加
量を変化させ、同様の実験を行い、処理水の銅濃
度を測定し、第３図に示す結果を得た。更に、処
理水に新たに硫酸銅を添加し、錯体を再び形成す
る銅濃度を検討した。その結果を第３図に示す。 Condition PH3 obtained from the above study results,
A similar experiment was conducted with Fe 2+ /H 2 O 2 (as 0) = 5, and the amount of hydrogen peroxide added to disodium EDTA in the copper plating waste liquid was varied, and the copper concentration in the treated water was measured. The results shown in FIG. 3 were obtained. Furthermore, copper sulfate was newly added to the treated water, and the copper concentration at which the complex was formed again was investigated. The results are shown in FIG.
第３図に示した結果から判るように、EDTA
に対する過酸化水素の添加比率を増加させるに従
い、銅が除去され、同時にCODMo成分が除去さ
れている。即ち、本発明方法は、単に錯体を形成
している金属を錯化剤から引き離して銅を遊離さ
せ、除去するのではなく、錯化剤を分解除去する
ことによつて銅を遊離させ、その後、従来の中和
凝集によつて銅を除去するものである。 As can be seen from the results shown in Figure 3, EDTA
As the addition ratio of hydrogen peroxide to the carbon dioxide increases, copper is removed and at the same time the COD Mo component is removed. That is, the method of the present invention does not simply separate the metal forming the complex from the complexing agent to liberate and remove copper, but rather liberates copper by decomposing and removing the complexing agent, and then , which removes copper by conventional neutralization agglomeration.
第３図から判るように、硫酸銅を新たに添加し
ても目標の0.5mg/以下をクリアする過酸化水素
は、EDTAに対して添加比３以上である。 As can be seen from Figure 3, even if copper sulfate is newly added, the hydrogen peroxide that meets the target of 0.5 mg/or less has an addition ratio of 3 or more to EDTA.
実施例
次に、本発明を実施例に基づいて説明するが、
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 explained based on examples.
The present invention is not limited to this.
実施例 １
Cu濃度13.3mg/、EDTA2ナトリウム
（Na2Y）濃度130mg/及びCODMo94.5mg/の化
学銅めつき廃液をPH３に調節し、Fe2+／H2O2（０
として）＝５、H2O2（０として）／EDTA2ナトリ
ウム（Na2Y）＝３となるように過酸化水素及び
硫酸第一鉄を添加し、充分撹拌した。Example 1 A chemical copper plating waste solution with a Cu concentration of 13.3 mg/, EDTA2 sodium (Na 2 Y) concentration of 130 mg/, and COD Mo 94.5 mg/ was adjusted to pH 3, and Fe 2+ /H 2 O 2 (0
Hydrogen peroxide and ferrous sulfate were added so that H 2 O 2 (as 0)/disodium EDTA (Na 2 Y) = 3, and the mixture was thoroughly stirred.
次いで、水酸化カルシウムを添加してPHを10に
調節し、更に高分子凝集剤を添加して沈澱物を除
去した。 Next, calcium hydroxide was added to adjust the pH to 10, and a polymer flocculant was further added to remove the precipitate.
このとき、処理水の銅濃度は約0.2mg/であ
り、同時にCODMoは約４mg/に低下していた。
この処理水に新たに硫酸銅を添加しても、処理水
の銅濃度を環境基準である0.5mg/に維持するこ
とができた。 At this time, the copper concentration in the treated water was approximately 0.2 mg/, and at the same time, the COD Mo decreased to approximately 4 mg/.
Even if copper sulfate was newly added to this treated water, the copper concentration in the treated water could be maintained at the environmental standard of 0.5mg/.
比較例 １
（従来の硫酸第一鉄法）
前記の実施例に使用したのと同じ水質の化学銅
めつき廃液に硫酸第一鉄を添加し、PH2.0で30分
撹拌し、反応させた後、水酸化カルシウムでPHを
12に調節し、銅を水酸化銅として析出させ、高分
子凝集剤を加えてフロツクを形成させ、沈降分離
を行つた。硫酸第一鉄の添加量を変化させた場合
の処理水の銅濃度を変動を測定し、結果を第４図
に示す。なお、同じ処理水に新たに硫酸銅を添加
した際に錯化剤とキレートを形成した銅の濃度を
第１図に併記した。Comparative Example 1 (Conventional ferrous sulfate method) Ferrous sulfate was added to a chemical copper plating waste liquid with the same water quality as that used in the previous example, and the mixture was stirred at pH 2.0 for 30 minutes to react. After that, adjust the pH with calcium hydroxide.
12, copper was precipitated as copper hydroxide, a polymer flocculant was added to form a floc, and sedimentation separation was performed. Changes in the copper concentration of the treated water were measured when the amount of ferrous sulfate added was changed, and the results are shown in FIG. In addition, the concentration of copper that formed a chelate with the complexing agent when copper sulfate was newly added to the same treated water is also shown in FIG.
この結果から明らかなように、硫酸第一鉄の添
加量を増加するに従つて、銅は除去でき、環境基
準である0.5mg/以下にすることができる。しか
し、この処理水に硫酸銅を添加した場合、錯体を
形成し、銅濃度は0.8mg/以上に上昇する。この
ことは、硫酸第一鉄法で銅を除去しても、錯化能
力は失われずに残り、再び金属と錯体を形成する
ことを意味する。即ち、硫酸第一鉄で還元した
後、水酸化物を析出させる際、他の系統の錯化剤
を含まない廃水、例えば電気めつき系の中和凝集
設備に混合流入させ、処理を行う場合、残存する
錯化力によつて再び錯体を形成し、処理効果を悪
化させることになる。 As is clear from this result, as the amount of ferrous sulfate added increases, copper can be removed and the amount can be reduced to below the environmental standard of 0.5 mg/. However, when copper sulfate is added to this treated water, a complex is formed and the copper concentration increases to 0.8 mg/or more. This means that even if copper is removed by the ferrous sulfate method, the complexing ability remains and it forms a complex with the metal again. That is, when hydroxide is precipitated after reduction with ferrous sulfate, wastewater that does not contain other types of complexing agents, such as mixed flow into electroplating type neutralization and flocculation equipment, is treated. , the remaining complexing power will form a complex again, worsening the treatment effect.
比較例 ２
（水酸化カルシウム法）
前記の実施例に使用したのと同じ水質の化学め
つき廃液に水酸化カルシウムを添加し、PH12で水
酸化銅を析出させ、高分子凝集剤でフロツクを形
成させ、沈降分離を行つた。Comparative Example 2 (Calcium hydroxide method) Calcium hydroxide was added to chemical plating waste liquid of the same water quality as used in the previous example, copper hydroxide was precipitated at pH 12, and flocs were formed with a polymer flocculant. Sedimentation separation was performed.
その結果、処理水の銅濃度は1.3mg/までしか
低下せず、この処理水に硫酸銅を新たに添加した
ところ、錯体を形成する銅濃度は3.7mg/まで増
加した。この結果は、比較例１の硫酸第一鉄法の
場合以上に錯化力を残しており、同様に問題のあ
ることを示す。 As a result, the copper concentration in the treated water decreased to only 1.3mg/, and when copper sulfate was newly added to the treated water, the copper concentration forming a complex increased to 3.7mg/. This result shows that the complexing power remains greater than that of the ferrous sulfate method of Comparative Example 1, and there is a similar problem.
発明の効果
以上のように、本発明によれば、従来の方法と
は異なり、銅の除去と同時に、錯化剤を分解除去
することができる。従つて、他の廃水系と混合し
て、後段の中和凝集装置を共有できるので、装置
が複雑にならず、経済的である。また、化学銅め
つき廃水系単独に本発明を適用しても、COD成
分の処理設備が不要になるという利点がある。Effects of the Invention As described above, according to the present invention, unlike conventional methods, the complexing agent can be decomposed and removed at the same time as copper is removed. Therefore, since it can be mixed with other wastewater systems and share the subsequent neutralization and coagulation device, the device does not become complicated and is economical. Further, even if the present invention is applied solely to a chemical copper plating wastewater system, there is an advantage that treatment equipment for COD components is not required.
第１図は、錯化剤の分解反応時のPHと処理水の
銅濃度との関係図、第２図は、Fe2+／H2O2（０と
して）比と処理水の銅濃度との関係図、第３図は
H2O2（０として）／EDTA（Na2Y）比と処理水
の銅濃度及びCODMoとの関係図、第４図は、従
来法の硫酸第一鉄法における硫酸第一鉄の添加量
と処理水の銅濃度との関係図である。
Figure 1 shows the relationship between the pH during the decomposition reaction of the complexing agent and the copper concentration in the treated water, and Figure 2 shows the relationship between the Fe 2+ /H 2 O 2 (assuming 0) ratio and the copper concentration in the treated water. The relationship diagram, Figure 3, is
Figure 4 shows the relationship between the H 2 O 2 (as 0)/EDTA (Na 2 Y) ratio and the copper concentration and COD Mo in the treated water. It is a relationship diagram between the amount and the copper concentration of treated water.
Claims (1)
を除去するため、該廃液に過酸化水素及び第一鉄
塩を添加して錯化剤を酸化分解し、その後、遊離
した銅を水酸化銅として析出させ、分離すること
を特徴とする化学銅めつき廃液中の銅の除去方
法。 ２ 過酸化水素を錯化剤に対して重量比で３〜５
倍、第一鉄塩を過酸化水素中の酸素に対して重量
比で５〜７倍添加し、PH３〜５の条件下で錯化剤
を酸化分解した後、PH10以上で銅を水酸化銅とし
て析出させる特許請求の範囲第１項記載の銅の除
去方法。[Claims] 1. In order to remove copper from a chemical copper plating waste solution containing a complexing agent and copper, hydrogen peroxide and ferrous salt are added to the waste solution to oxidize and decompose the complexing agent, and then A method for removing copper from a chemical copper plating waste solution, characterized by precipitating and separating liberated copper as copper hydroxide. 2 Hydrogen peroxide to complexing agent in a weight ratio of 3 to 5
After adding 5 to 7 times the weight ratio of ferrous salt to the oxygen in hydrogen peroxide and oxidatively decomposing the complexing agent under the condition of pH 3 to 5, copper hydroxide was added at pH 10 or higher. The method for removing copper according to claim 1, wherein the copper is precipitated as a copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60141900A JPS624492A (en) | 1985-06-28 | 1985-06-28 | Method for removing copper in waste chemical copper plating liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60141900A JPS624492A (en) | 1985-06-28 | 1985-06-28 | Method for removing copper in waste chemical copper plating liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS624492A JPS624492A (en) | 1987-01-10 |
| JPH0128629B2 true JPH0128629B2 (en) | 1989-06-05 |
Family
ID=15302772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60141900A Granted JPS624492A (en) | 1985-06-28 | 1985-06-28 | Method for removing copper in waste chemical copper plating liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS624492A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633931Y2 (en) * | 1989-06-19 | 1994-09-07 | 松本 康男 | Bedsore prevention bed |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100467266B1 (en) * | 1999-12-23 | 2005-01-24 | 주식회사 포스코 | A treatment method of high concentrated phenolsulfonic acid containing tin-plated wastewaters |
| CN103787400B (en) * | 2013-12-30 | 2015-08-05 | 广州科城环保科技有限公司 | The treatment process of a kind of microetch waste liquid and bluestone waste |
| CN109592821A (en) * | 2019-01-23 | 2019-04-09 | 广州大学 | A kind of method of EDTA- thallium complex in removal waste water |
-
1985
- 1985-06-28 JP JP60141900A patent/JPS624492A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633931Y2 (en) * | 1989-06-19 | 1994-09-07 | 松本 康男 | Bedsore prevention bed |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS624492A (en) | 1987-01-10 |
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| LAPS | Cancellation because of no payment of annual fees |