JPH0469240B2 - - Google Patents
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- Publication number
- JPH0469240B2 JPH0469240B2 JP2917789A JP2917789A JPH0469240B2 JP H0469240 B2 JPH0469240 B2 JP H0469240B2 JP 2917789 A JP2917789 A JP 2917789A JP 2917789 A JP2917789 A JP 2917789A JP H0469240 B2 JPH0469240 B2 JP H0469240B2
- Authority
- JP
- Japan
- Prior art keywords
- plating
- rare earth
- waste liquid
- earth ions
- 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.)
- Expired
Links
- 238000007747 plating Methods 0.000 claims description 59
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 23
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 23
- -1 rare earth ions Chemical class 0.000 claims description 21
- 239000002699 waste material Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 5
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 38
- 239000000243 solution Substances 0.000 description 23
- 239000000654 additive Substances 0.000 description 7
- 229910001172 neodymium magnet Inorganic materials 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 4
- 150000001342 alkaline earth metals Chemical class 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 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 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- 229910003514 Sr(OH) Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 description 1
- 229910001863 barium hydroxide Inorganic materials 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- NINOVVRCHXVOKB-UHFFFAOYSA-N dialuminum;dioxido(dioxo)chromium Chemical compound [Al+3].[Al+3].[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O.[O-][Cr]([O-])(=O)=O NINOVVRCHXVOKB-UHFFFAOYSA-N 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002921 fermentation waste Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LAIZPRYFQUWUBN-UHFFFAOYSA-L nickel chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ni+2] LAIZPRYFQUWUBN-UHFFFAOYSA-L 0.000 description 1
- RRIWRJBSCGCBID-UHFFFAOYSA-L nickel sulfate hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-]S([O-])(=O)=O RRIWRJBSCGCBID-UHFFFAOYSA-L 0.000 description 1
- 229940116202 nickel sulfate hexahydrate Drugs 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】
利用産業分野
この発明は、Nd−Fe−Ｂ系永久磁石のNiめつ
きに使用された希土類イオンを多量含有する硫酸
酸性めつき廃液の再生方法に係り、特に希土類イ
オンを多量に含有するNiまたはNiを主成分とす
る合金めつき廃液に、アルカリ土類金属の水酸化
物または酸化物を添加して所定PH濃度となして希
土類イオンを沈澱除去し、液中に不純物を残存さ
せない再生方法に関する。[Detailed Description of the Invention] Field of Application The present invention relates to a method for regenerating sulfuric acid acid plating waste liquid containing a large amount of rare earth ions and used for Ni plating of Nd-Fe-B permanent magnets. Alkaline earth metal hydroxides or oxides are added to the Ni or Ni-based alloy plating waste liquid containing a large amount of This invention relates to a regeneration method that does not leave behind any impurities.
従来技術
Nd−Fe−Ｂ系合金で代表される希土類−鉄−
硼素系合金磁石は、現在最も高い磁気特性を有す
る永久磁石として注目されている。Prior art Rare earths - iron - represented by Nd-Fe-B alloys
BACKGROUND ART Boron-based alloy magnets are currently attracting attention as permanent magnets with the highest magnetic properties.
かかるNd−Fe−Ｂ系永久磁石は、一般に常温
大気中で腐食されやすく、そのため防食用表面処
理として、樹脂塗装あるいはアルミニウム−クロ
メート処理等がなされている。 Such Nd-Fe-B permanent magnets are generally susceptible to corrosion in the atmosphere at room temperature, and therefore are subjected to anti-corrosion surface treatments such as resin coating or aluminum chromate treatment.
さらに、最近、高温高湿の条件にて使用される
自動車部品用磁石には耐食性にすぐれたNiめつ
きが用いられている。 Furthermore, recently, Ni plating, which has excellent corrosion resistance, has been used in magnets for automobile parts that are used under conditions of high temperature and high humidity.
一般に磁石に用いられるNiめつき液、特にワ
ツト浴は、PH4.0〜4.5の硫酸酸性液であるため、
前記液中で磁石は腐食されて、磁石中の希土類元
素は急速に溶出し、前記希土類イオンがめつき液
中に2000ppm以上溶出含有されると、磁石のめつ
き不良を惹起する問題がある。 The Ni plating solution generally used for magnets, especially the Watt bath, is a sulfuric acid acidic solution with a pH of 4.0 to 4.5.
The magnet is corroded in the solution, and the rare earth elements in the magnet are rapidly eluted, and if the rare earth ions are eluted and contained in the plating solution in an amount of 2000 ppm or more, there is a problem of causing poor plating of the magnet.
ところが、現在、めつき液に溶出された希土類
イオンを効率的に除去して、劣化めつき液を再生
する方法が未だ提案されていないため、劣化した
めつき液は廃棄されていた。 However, since no method has yet been proposed to efficiently remove the rare earth ions eluted into the plating solution and regenerate the deteriorated plating solution, the deteriorated plating solution has been discarded.
また、従来、溶液中の希土類イオンを分離する
方法としては、液中の希土類イオンを(1)フツ化
物、または(2)シユウ酸化物に変化させて、分離す
る方法が一般的である。 Conventionally, a common method for separating rare earth ions in a solution is to convert the rare earth ions in the solution into (1) a fluoride or (2) a sulfur oxide.
前者(1)方法では、溶液中のフツ化物イオンによ
り、処理装置の腐食が発生したり、人体に有害で
あるなどの問題があり、また後者(2)方法では、溶
液がめつき液の場合は、めつき液の主成分の金属
イオンが優先的にシユウ酸化物になる恐れがあ
り、前述のNd−Fe−Ｂ系永久磁石用Niめつき液
の再生方法に適用できなかつた。 In the former method (1), there are problems such as corrosion of processing equipment and harm to the human body due to fluoride ions in the solution, and in the latter method (2), if the solution is a plating solution, However, there is a risk that the metal ions that are the main components of the plating solution may preferentially become sulfur oxides, so that it could not be applied to the method for regenerating the Ni plating solution for Nd-Fe-B permanent magnets described above.
発明の目的
この発明は、従来廃棄されてたNd−Fe−Ｂ系
永久磁石のNiまたはNi合金めつきに使用された
希土類イオンを多量含有する硫酸酸性めつき廃液
を、安全にかつ効率よく再生使用できる再生方法
の提案を目的としている。Purpose of the invention This invention safely and efficiently regenerates sulfuric acid acid plating waste liquid containing a large amount of rare earth ions, which was previously discarded and used for plating Ni or Ni alloy of Nd-Fe-B permanent magnets. The purpose is to propose playback methods that can be used.
発明の概要
発明者らは、希土類磁石のNiまたはNiを主成
分とするNi合金めつき用硫酸酸性めつき液中に
多量に溶出した希土類イオンを除去すると共に、
除去するために加える添加剤がめつき液中に不純
物として残存しないめつき廃液の再生方法につい
て種々検討した結果、
希土類イオンを多量含有するNiまたはNiを主
成分とする合金めつき用硫酸酸性めつき廃液のPH
値を特定の領域にすることにより、劣化めつき液
中の希土類イオンは水酸化物として沈澱して、希
土類イオンを除去することができるが、PHを調整
するための添加剤としてNa、Ｋ、NH4等の水溶
性水酸化物または酸化物の１種または２種を添加
した場合は、前記添加剤がまた、めつき不良の原
因となる問題があることを知見した。Summary of the Invention The inventors removed a large amount of rare earth ions eluted in a sulfuric acid acidic plating solution for plating Ni of a rare earth magnet or a Ni alloy mainly composed of Ni, and
As a result of various studies on methods for regenerating plating waste liquid in which the additives added to remove the additives do not remain as impurities in the plating liquid, we found that sulfuric acid acid plating for plating Ni containing large amounts of rare earth ions or alloys mainly composed of Ni has been developed. PH of waste liquid
By setting the value in a specific range, the rare earth ions in the deteriorated plating solution will precipitate as hydroxide and can be removed, but Na, K, It has been found that when one or two water-soluble hydroxides or oxides such as NH 4 are added, the additives also cause problems in plating defects.
さらに、検討の結果、PH調整剤として、Mg、
Ca、Sr、Ba等のアルカリ土類金属の水溶性水酸
化物または酸化物を用いることにより、添加剤中
のアルカリ土類イオンは硫酸塩として沈澱するた
め、液中に不純物として残存せず、再生に最適で
あることを知見し、この発明を完成した。 Furthermore, as a result of study, Mg,
By using water-soluble hydroxides or oxides of alkaline earth metals such as Ca, Sr, and Ba, the alkaline earth ions in the additive precipitate as sulfates, so they do not remain as impurities in the liquid. They found that it was optimal for regeneration and completed this invention.
この発明は、
希土類イオンを2000ppm以上含有したNiまた
はNiを主成分とする合金めつき用硫酸酸性めつ
き廃液に、
アルカリ土類金属の水酸化物または酸化物の１
種または２種を添加して、PH4.9〜6.2に調整し
て、前記めつき廃液より希土類イオンを除去する
ことを特徴とするNiまたはNi合金めつき廃液の
再生方法である。 In this invention, a hydroxide or oxide of an alkaline earth metal is added to a sulfuric acid acid plating waste solution for plating Ni or an alloy mainly composed of Ni containing 2000 ppm or more of rare earth ions.
This is a method for regenerating Ni or Ni alloy plating waste liquid, which comprises adding a species or two to adjust the pH to 4.9 to 6.2 and removing rare earth ions from the plating waste liquid.
発明の構成
この発明のめつき廃液での反応を、下記(1)〜(4)
式の反応式にて表す。Structure of the Invention The reaction with the plating waste liquid of this invention is described in (1) to (4) below.
It is expressed by the reaction formula of Eq.
硫酸酸性めつき廃液にアルカリ土類金属の水
酸化物を添加する場合
Ａ（OH）2→A2+＋2OH- ……(1)
R3+＋3OH-→Ｒ（OH）3↓ ……(2)
A2+＋SO4 2-→ASO4↓ ……(3)
（Ａ；アルカリ土類金属 Ｒ；希土類金属）
硫酸酸性めつき廃液にアルカリ土類金属の酸
化物を添加する場合
AO＋H2O→Ａ（OH）2 ……(4)
(4)式の反応の後、前記(1)(2)(3)式にて表わされる
反応を行なつて、めつき廃液中の希土類イオンを
沈澱除去すると共に、アルカリ土類金属は硫酸塩
の形で除去でき、めつき廃液を再生することがで
きる。 When adding alkaline earth metal hydroxide to sulfuric acid acidic plating waste liquid A(OH) 2 →A 2+ +2OH - ……(1) R 3+ +3OH - →R(OH) 3 ↓ ……(2 ) A 2+ +SO 4 2- →ASO 4 ↓ ……(3) (A: Alkaline earth metal R: Rare earth metal) When adding alkaline earth metal oxide to sulfuric acid acidic plating waste liquid AO+H 2 O→ A(OH) 2 ...(4) After the reaction of equation (4), the reactions expressed by equations (1), (2), and (3) above are performed to precipitate and remove rare earth ions in the plating waste liquid. At the same time, the alkaline earth metal can be removed in the form of sulfate, and the plating waste liquid can be recycled.
この発明におけるNiめつき液としては、ワツ
ト浴の他に普通浴、硬質Niめつき液、黒色Niめ
つき液などを用いることができる。 As the Ni plating solution in this invention, in addition to the Watt bath, a normal bath, a hard Ni plating solution, a black Ni plating solution, etc. can be used.
また、この発明のNiまたはNi合金めつき液は
Ｒ−Fe−Ｂ系磁石のNiめつきの外に、RCo系磁
石のNiめつき等にも適用できる。 Further, the Ni or Ni alloy plating solution of the present invention can be applied not only to Ni plating of R-Fe-B magnets but also to Ni plating of RCo magnets.
この発明において、希土類イオンを2000ppm〜
3000ppm含有の硫酸酸性めつき廃液に、アルカリ
土類金属の水酸化物または酸化物を添加する場合
は、添加剤の添加されためつき廃液のPHを、5.4
〜6.2に調整することが好ましく、PH値が5.4未満
では、希土類イオンの濃度をめつき不良が発生し
ない領域まで低減できない問題があり、また、PH
値が6.2を超えると、めつき液中の主成分である
Niが水酸化物として沈澱して多量損失するので
好ましくない。 In this invention, the amount of rare earth ions is 2000ppm~
When adding alkaline earth metal hydroxides or oxides to sulfuric acid acid plating waste liquid containing 3000 ppm, the pH of the plating waste liquid to which the additive has been added should be 5.4.
It is preferable to adjust the pH value to ~6.2. If the pH value is less than 5.4, there is a problem that the concentration of rare earth ions cannot be reduced to a range where plating defects do not occur.
If the value exceeds 6.2, it is the main component in the plating solution.
This is not preferable because Ni precipitates as hydroxide and a large amount is lost.
また、希土類イオンを3000ppm以上含有の硫酸
酸性めつき廃液にアルカリ土類金属の水酸化物、
または酸化物を添加する場合は、添加されためつ
き廃液のPHを、4.9〜6.2に調整することが好まし
い。 In addition, alkaline earth metal hydroxides are added to sulfuric acid acid plating waste liquid containing 3000 ppm or more of rare earth ions.
Alternatively, when adding an oxide, it is preferable to adjust the pH of the added fermentation waste liquid to 4.9 to 6.2.
PH値が4.9未満では前述した如く希土類イオン
の濃度をめつき不良が発生しない領域まで低減で
きない問題があり、またPH値が6.2を超えると、
めつき液中の主成分であるNiが水酸化物として
沈澱して多量損失するので好ましくない。 If the PH value is less than 4.9, as mentioned above, there is a problem that the concentration of rare earth ions cannot be reduced to a level where plating defects do not occur, and if the PH value exceeds 6.2,
This is not preferable because Ni, which is the main component in the plating solution, precipitates as hydroxide and is lost in large amounts.
この発明のNiめつき用硫酸酸性めつき液は、
主成分がNiSO4で、その外にNiCl2、NH4Cl等が
含まれ、また、緩衝剤としてはホウ酸が好ましく
PH値は3.8〜6.2であり、ワツト浴の場合はPH4.0〜
4.5である。 The sulfuric acid acid plating solution for Ni plating of this invention is
The main component is NiSO 4 , and NiCl 2 , NH 4 Cl, etc. are also included, and boric acid is preferred as a buffering agent.
The PH value is 3.8 to 6.2, and in the case of Watsuto bath, it is PH4.0 to
It is 4.5.
この発明において、好ましいアルカリ土類金属
の水酸化物、または酸化物は、Ba（OH）2、BaO
の外にSr（OH）2、SrOである。 In this invention, preferred alkaline earth metal hydroxides or oxides include Ba(OH) 2 , BaO
In addition to Sr(OH) 2 and SrO.
実施例
実施例 １
Nd−Ｂ−Fe焼結磁石を、
硫酸ニツケル、６水和物240ｇ／、
塩化ニツケル、６水和物45ｇ／、
ホウ酸30ｇ／組成で、PH4.4、浴温45℃のワ
ツト浴にてNiめつきを繰返し行なつた後、劣化
したNiめつき浴中のNd量を測定した結果、Nd
量は3048ppmであつた。Examples Example 1 A Nd-B-Fe sintered magnet was prepared with the following composition: 240 g of nickel sulfate hexahydrate, 45 g of nickel chloride hexahydrate, and 30 g of boric acid, PH4.4, bath temperature 45°C. As a result of measuring the amount of Nd in the deteriorated Ni plating bath after repeatedly performing Ni plating in the Watt bath, it was found that Nd
The amount was 3048ppm.
上記の劣化したNiめつき浴を45℃に加熱して、
水酸化バリウム（Ba（OH）2・8H2O）を2.5ｇ／
添加して、PH値を5.2に調整し、所要時間撹拌
した後、濾過したNiめつき浴中のNd量、及び残
存Ba量をICPにて測定した結果、Nd量は
1053ppm、Ba量は0.08ppmであつた。 Heat the deteriorated Ni plating bath above to 45℃,
2.5 g of barium hydroxide (Ba(OH) 2.8H 2 O)/
After adding the nickel and adjusting the pH value to 5.2 and stirring for the required time, the amount of Nd and remaining Ba in the filtered Ni plating bath was measured by ICP, and the amount of Nd was
The amount of Ba was 1053ppm and 0.08ppm.
実施例 ２
実施例１の劣化したNiめつき浴を45℃に加熱
して、BaOを1.5ｇ／添加して、PH値を5.9に調
整し、所要時間撹拌した。Example 2 The deteriorated Ni plating bath of Example 1 was heated to 45° C., 1.5 g/BaO was added, the pH value was adjusted to 5.9, and the bath was stirred for the required time.
濾過したNiめつき浴をさらに１昼夜放置し、
生成した沈澱を濾過した後、Niめつき浴中のNd
量及び残存Ba量をICPにて測定した結果、Nd量
は19.5ppm、Ba量は0.03ppmであつた。 Leave the filtered nickel bath for another day and night.
After filtering the generated precipitate, remove Nd from the Ni plating bath.
The amount of Nd and the amount of residual Ba were measured by ICP, and the amount of Nd was 19.5 ppm and the amount of Ba was 0.03 ppm.
また、添加剤としてBaOを添加して処理する
前後のNi量をEDTA法にて測定した結果、Niの
損失率は1.4％であつた。 In addition, as a result of measuring the amount of Ni before and after treatment with BaO added as an additive by the EDTA method, the loss rate of Ni was 1.4%.
発明の効果
実施例からも明らかなように、安全にかつ効率
よく希土類イオンを沈澱除去でき、添加剤も再生
液中に不純物として残存せず、Niの損失率も僅
かであり、希土類イオンを多量に含有するNiま
たはNiを主成分とする合金めつき廃液の再生に
最適である。Effects of the invention As is clear from the examples, rare earth ions can be safely and efficiently removed by precipitation, additives do not remain as impurities in the regenerated liquid, the loss rate of Ni is small, and rare earth ions can be removed in large amounts. It is ideal for regenerating Ni or alloy plating waste liquid mainly composed of Ni.
Claims (1)
たはNiを主成分とする合金めつき用硫酸酸性め
つき廃液に、アルカリ土類金属の水酸化物または
酸化物の１種または２種を添加して、PH4.9〜6.2
に調整して、前記めつき廃液より希土類イオンを
除去することを特徴とするNiまたはNi合金めつ
き廃液の再生方法。1 One or two types of alkaline earth metal hydroxides or oxides are added to sulfuric acid acid plating waste solution for plating Ni or Ni-based alloys containing 2000 ppm or more of rare earth ions. .9~6.2
A method for regenerating Ni or Ni alloy plating waste liquid, the method comprising adjusting the plating waste liquid to remove rare earth ions from the plating waste liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2917789A JPH02209500A (en) | 1989-02-08 | 1989-02-08 | Method for regenerating used ni or ni alloy plating solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2917789A JPH02209500A (en) | 1989-02-08 | 1989-02-08 | Method for regenerating used ni or ni alloy plating solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02209500A JPH02209500A (en) | 1990-08-20 |
| JPH0469240B2 true JPH0469240B2 (en) | 1992-11-05 |
Family
ID=12268947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2917789A Granted JPH02209500A (en) | 1989-02-08 | 1989-02-08 | Method for regenerating used ni or ni alloy plating solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02209500A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013047340A1 (en) * | 2011-09-28 | 2013-04-04 | 日立金属株式会社 | Method for removing rare earth impurities in electrolytic nickel plating solution |
| JP5835001B2 (en) * | 2012-02-27 | 2015-12-24 | 日立金属株式会社 | Method for removing rare earth impurities in electro nickel plating solution |
| JP6319297B2 (en) | 2013-03-25 | 2018-05-09 | 日立金属株式会社 | Method for removing rare earth impurities in electro nickel plating solution |
| JP6281565B2 (en) | 2013-03-25 | 2018-02-21 | 日立金属株式会社 | Method for removing rare earth impurities in electro nickel plating solution |
| JP6119353B2 (en) * | 2013-03-25 | 2017-04-26 | 日立金属株式会社 | Electric nickel plating equipment |
-
1989
- 1989-02-08 JP JP2917789A patent/JPH02209500A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02209500A (en) | 1990-08-20 |
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