JPH0699829B2 - Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate - Google Patents
Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrateInfo
- Publication number
- JPH0699829B2 JPH0699829B2 JP61048113A JP4811386A JPH0699829B2 JP H0699829 B2 JPH0699829 B2 JP H0699829B2 JP 61048113 A JP61048113 A JP 61048113A JP 4811386 A JP4811386 A JP 4811386A JP H0699829 B2 JPH0699829 B2 JP H0699829B2
- Authority
- JP
- Japan
- Prior art keywords
- filtrate
- dichlorodiammine
- recovery method
- liquid
- electrolysis
- 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 - Fee Related
Links
- 239000000706 filtrate Substances 0.000 title claims description 24
- 229910052697 platinum Inorganic materials 0.000 title claims description 24
- 229910052763 palladium Inorganic materials 0.000 title claims description 19
- 229910052703 rhodium Inorganic materials 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 10
- 238000011084 recovery Methods 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 description 10
- 238000005868 electrolysis reaction Methods 0.000 description 7
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 229910000033 sodium borohydride Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrolytic Production Of Metals (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ジクロロジアンミンPd濾液やこれが溶けてい
る液からのPd、Pt、Rh回収法に関する。TECHNICAL FIELD The present invention relates to a method for recovering Pd, Pt, and Rh from a dichlorodiammine Pd filtrate or a liquid in which it is dissolved.
（従来の技術とその問題点） 従来、ジクロロジアンミンPd沈殿を生成した時の濾液及
びこれが溶けている液からPd、Pt、Rhを回収するには、
NaOHとヒドラジンを用いて還元するのが一般的である。
この場合Pdはほぼ完全に還元するが、Pt、Rhは一部しか
還元せず、残部は液中に留まる。更にＳ・Ｂ・Ｈ（ソデ
ィウムボロハイドライド）を添加して残部のPt、Rhを回
収する方法も考えられるが、完全に還元させることがで
きず、例えばPtは５〜50mg/l程度液中に残留する。(Conventional technology and its problems) Conventionally, in order to recover Pd, Pt, and Rh from a filtrate and a liquid in which the dichlorodiammine Pd precipitate is produced,
It is common to reduce with NaOH and hydrazine.
In this case, Pd is almost completely reduced, but Pt and Rh are only partially reduced, and the rest remains in the liquid. It is also possible to recover the remaining Pt and Rh by adding S · B · H (sodium borohydride), but it cannot be completely reduced. For example, Pt is about 5 to 50 mg / l in the liquid. To remain.
またヒドラジンを使用している為、液のCODが上ってし
まい、酸化処理をしなければならない。Also, since hydrazine is used, the COD of the liquid rises, and it must be oxidized.
さらに薬品還元の為、回収に手間がかかる。Furthermore, it takes time and effort to collect the chemicals because they are returned.
そこで本発明はこれらの問題点を解決し、Pdが5mg/l以
下になるまで回収できることは勿論のこと、共存してい
るPt、Rhのアンミン錯体の回収も同時にできるジクロロ
ジアンミンPd濾液からのPd、Pt、Rhの回収法を提供せん
とするものである。Therefore, the present invention solves these problems, and of course, it is possible to recover Pd to 5 mg / l or less, and it is also possible to recover the coexisting Pt and Rh ammine complexes at the same time. , Pt, Rh recovery method.
（問題点を解決するための手段） 上記問題点を解決するための本発明のジクロロジアンミ
ンPd濾液からのPd、Pt、Rhの回収法は、電解槽中にジク
ロロジアンミンPd濾液を収容し、陰極電流密度５〜20A/
dm2で電解して、Pd、Pt、Rhを回収することを特徴とす
るものである。(Means for Solving Problems) A method for recovering Pd, Pt, and Rh from the dichlorodiammine Pd filtrate of the present invention for solving the above problems, a dichlorodiammine Pd filtrate is contained in an electrolytic cell, and a cathode is used. Current density 5-20A /
It is characterized in that Pd, Pt and Rh are recovered by electrolysis with dm 2 .
（実施例） 本発明によるジクロロジアンミンPd濾液からのPd、Pt、
Rhの回収法の実施例について説明する。先ず、本法を実
施するための電解装置の概略を第１図によって説明する
と、１は電解槽、２は濾液を攪拌するマグネチックスタ
ーラ、３、４は電解槽１内に設けられた陽極及び陰極
で、この陽極３及び陰極４はPt−Ti網より成り、電解槽
１外の電源に連なる整流器５に接続されている。６は温
度計である。Example Pd, Pt, from the dichlorodiammine Pd filtrate according to the invention
An example of the Rh recovery method will be described. First, an outline of an electrolysis apparatus for carrying out the present method will be described with reference to FIG. 1. 1 is an electrolytic cell, 2 is a magnetic stirrer for stirring a filtrate, 3 and 4 are an anode provided in the electrolytic cell 1 and As the cathode, the anode 3 and the cathode 4 are made of a Pt-Ti net and are connected to a rectifier 5 connected to a power source outside the electrolytic cell 1. 6 is a thermometer.
次に本法の一実施例について説明する。電解槽１内に、
ジクロロジアンミンPd濾液（初濃度Pd445mg/l、Pt407mg
/l）７を１収容し、陽極３と陰極４を電極寸法巾12.5
cm、高さ5cmのものに代え且つ極間距離を約2cmとなし
て、マグネチックスターラ２にて回転して、ジクロロジ
アンミンPd濾液７を攪拌し乍ら、陰極の電極電位を各金
属錯体の析出電位よりも高い5Vとし、陰極電流密度約12
A/dm2（初設定時、液温24℃）で電解した処、第２図の
グラフに示すようにジクロロジアンミンPd濾液７中のP
d、Pt濃度が経時的に低下し、１時間30分経過した時点
でPd1mg/l以下、Pt42mg/lとなり、４時間30分経過した
時点ではPdが1mg/l以下、Ptが2mg/lとなって、Pd、Pt濃
度が著しく低下し、それだけジクロロジアンミンPd濾液
７からPd、Ptが効率良く回収されたことが判る。Next, an example of this method will be described. In the electrolytic cell 1,
Dichlorodiammine Pd filtrate (initial concentration Pd445mg / l, Pt407mg
/ l) 7 is accommodated in one, and the anode 3 and the cathode 4 have an electrode dimension width of 12.5.
cm, height 5 cm and distance between the electrodes is about 2 cm, and the mixture is rotated by a magnetic stirrer 2 to stir the dichlorodiamine Pd filtrate 7 and the cathode electrode potential of each metal complex is adjusted. Cathode current density of about 12V, 5V higher than deposition potential
After electrolysis at A / dm 2 (initial setting, liquid temperature 24 ° C), P in the dichlorodiammine Pd filtrate 7 as shown in the graph in Fig. 2
d, Pt concentration decreased with time, and Pd was 1 mg / l or less and Pt was 42 mg / l at 1 hour and 30 minutes, and Pd was 1 mg / l and Pt was 2 mg / l at 4 hours and 30 minutes. Then, it is understood that the concentrations of Pd and Pt are remarkably lowered, and that Pd and Pt are efficiently recovered from the dichlorodiammine Pd filtrate 7.
このジクロロジアンミンPd濾液７の電解に於いて、液温
の上昇による水の蒸発、ガスの発生による液量の減少が
少なく、当初の液量1,000mlは最終的には（基準値5mg/l
以下になるまで）650mlとなった。またこのジクロロジ
アンミンPd濾液７は当初強酸性であったが、Pd、Ptが基
準値5mg/l以下になった４時間30分の時点では、PH＝８
〜９となっていた。これは電解が進行するにつれて、苛
性ソーダが生成されるからと思われる。In the electrolysis of this dichlorodiammine Pd filtrate 7, there was little evaporation of water due to the rise of the liquid temperature, and the decrease of the liquid amount due to the generation of gas was small.
It became 650 ml until it became below. This dichlorodiammine Pd filtrate 7 was initially strongly acidic, but at the time of 4 hours and 30 minutes when Pd and Pt fell below the standard value of 5 mg / l, PH = 8.
It was ~ 9. This is probably because caustic soda is produced as the electrolysis proceeds.
電解によって析出したPt及びPdブラックの殆んどは液中
に浮遊しており、陰極４に付着したものは僅かで、指で
こするとすぐに取れた。Most of the Pt and Pd black deposited by electrolysis floated in the liquid, and only a small amount adhered to the cathode 4, which was immediately removed by rubbing with a finger.
尚、上記実施例ではPd、Ptの回収について説明したが、
Rhが含有するジクロロジアンミンPd濾液の場合も同様に
Pd、Rhの電解回収できることは勿論である。また従来薬
品では回収できないジクロロジアンミンPd濾液に共存し
ているPtやRhのアンミン錯体も同時に電解回収できる。
このPtやRhのアンミン錯体の共存イオンは、ジクロロジ
アンミンPd濾液に、Na+が70g/l以下、Cl-が300g/l以
下、NH4 +が100g/l以下入っていて、PtやRhとアンミン錯
体を構成しているものである。In the above example, the recovery of Pd and Pt was explained,
Also in the case of dichlorodiammine Pd filtrate containing Rh
Of course, Pd and Rh can be electrolytically recovered. Also, the ammine complex of Pt and Rh coexisting in the dichlorodiammine Pd filtrate, which cannot be recovered by conventional chemicals, can be simultaneously electrolytically recovered.
Coexistence ion ammine complexes of Pt and Rh are the dichloro-diammine Pd filtrate, Na + is 70 g / l or less, Cl - is 300 g / l or less, NH 4 + is contains less 100 g / l, and Pt and Rh It constitutes an ammine complex.
（発明の効果） 以上の説明で判るように本発明によれば、電解によって
ジクロロジアンミンPd濾液及びこれが溶けている液から
Pd、Pt、Rh等の殆んどを回収できることは勿論のこと、
ジクロロジアンミンPd濾液中にPt、Rhのアンミン錯体が
共存している場合でもこれらを同時に回収できる。また
従来のようにヒドラジンを使用しないので、ジクロロジ
アンミンPd濾液のCODが上ることが無く、酸化処理する
必要が無い。従って、ジクロロジアンミンPd濾液からの
Pd、Pt、Rh等の回収作業を無人化、省力化できるという
優れた効果がある。(Effect of the invention) As can be seen from the above description, according to the present invention, the dichlorodiamine Pd filtrate and the liquid in which it is dissolved by electrolysis are used.
Of course, most of Pd, Pt, Rh, etc. can be recovered,
Even when Pt and Rh ammine complexes coexist in the dichlorodiammine Pd filtrate, these can be simultaneously recovered. Further, since hydrazine is not used as in the conventional case, the COD of the dichlorodiammine Pd filtrate does not rise and it is not necessary to oxidize it. Therefore, from the dichlorodiammine Pd filtrate
There is an excellent effect that the recovery work of Pd, Pt, Rh, etc. can be unmanned and labor saving.
第１図は本発明によるジクロロジアンミンPd濾液からの
Pd、Pt、Rhの回収法を実施する電解装置の概略図、第２
図は本発明の回収法によるジクロロジアンミンPd濾液の
Pd、Pt濃度の経時的な変化を示すグラフである。FIG. 1 shows from the dichlorodiamine Pd filtrate according to the invention
Schematic diagram of the electrolyzer for carrying out the recovery method of Pd, Pt, Rh, 2nd
The figure shows the dichlorodiamine Pd filtrate obtained by the recovery method of the present invention.
5 is a graph showing changes in Pd and Pt concentrations over time.
Claims (1)
収容し、陰極電流密度５〜20A/dm2で電解して、Pd、P
t、Rhを回収することを特徴とするジクロロジアンミンP
d濾液からのPd、Pt、Rhの回収法。1. A dichlorodiammine Pd filtrate is contained in an electrolytic cell and electrolyzed at a cathode current density of 5 to 20 A / dm 2 to obtain Pd and Pd.
Dichlorodiammine P characterized by recovering t and Rh
d Recovery method of Pd, Pt, and Rh from filtrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61048113A JPH0699829B2 (en) | 1986-03-05 | 1986-03-05 | Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61048113A JPH0699829B2 (en) | 1986-03-05 | 1986-03-05 | Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62205294A JPS62205294A (en) | 1987-09-09 |
| JPH0699829B2 true JPH0699829B2 (en) | 1994-12-07 |
Family
ID=12794259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61048113A Expired - Fee Related JPH0699829B2 (en) | 1986-03-05 | 1986-03-05 | Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0699829B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH086193B2 (en) * | 1986-04-28 | 1996-01-24 | 田中貴金属工業株式会社 | Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate |
| JPS6483682A (en) * | 1987-09-26 | 1989-03-29 | Tanaka Precious Metal Ind | Method for recovering noble metal from solution |
| JPH04131393A (en) * | 1990-09-21 | 1992-05-06 | Power Reactor & Nuclear Fuel Dev Corp | Method and device for recovering palladium by electrolysis method |
| CN105256138A (en) * | 2015-11-18 | 2016-01-20 | 金川集团股份有限公司 | Method for separating platinum group metal from platinum group metal-contained solution |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826812A1 (en) * | 1978-06-19 | 1980-01-03 | Wagner Fa Ferd | SILVER ALLOY WIRE FOR JEWELRY CHAINS |
| JPS55145189A (en) * | 1979-04-30 | 1980-11-12 | Kimura Etsuchingu Kenkyusho:Kk | Electrolytic treating apparatus of waste liquid containing silver |
| JPS585996A (en) * | 1981-07-02 | 1983-01-13 | 松下電工株式会社 | Photoelectric automatic flasher with dimming function |
| JPS59179723A (en) * | 1983-03-28 | 1984-10-12 | マ−・インダストリ−ズ・インコ−ポレ−テツド | Gold recovering process and device |
-
1986
- 1986-03-05 JP JP61048113A patent/JPH0699829B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62205294A (en) | 1987-09-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |