JPH086193B2 - Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate - Google Patents
Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrateInfo
- Publication number
- JPH086193B2 JPH086193B2 JP61098631A JP9863186A JPH086193B2 JP H086193 B2 JPH086193 B2 JP H086193B2 JP 61098631 A JP61098631 A JP 61098631A JP 9863186 A JP9863186 A JP 9863186A JP H086193 B2 JPH086193 B2 JP H086193B2
- Authority
- JP
- Japan
- Prior art keywords
- filtrate
- dinitrodiammine
- recovery method
- recovering
- liquid
- 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 - Lifetime
Links
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、ジニトロジアンミン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 dinitrodiammine Pd filtrate or a liquid in which it is dissolved.
（従来の技術とその問題点） 従来、ジニトロジアンミンPd沈澱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、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、Pt、Rhは一部しか還元されず、液中に留ま
る。更にSBH（ソディウムボロハイドライド）を添加し
て残部のPd、Pt、Rhを回収する方法も考えられるが、完
全に還元された終点を見極めることが難しく、例えばPd
は５〜50mg/程度液中に残留する。(Prior art and its problems) Conventionally, in order to recover Pd, Pt, and Rh from the filtrate and the liquid in which the dinitrodiammine Pd precipitate was formed, reduction with hydrazine was generally used. is there. In this case, Pd, Pt, and Rh are only partially reduced and remain in the liquid. A method of recovering the remaining Pd, Pt, and Rh by adding SBH (sodium borohydride) is also conceivable, but it is difficult to determine the completely reduced end point.
Remains in the solution at about 5 to 50 mg / ml.
またヒドラジンを使用している為、液のCOD（化学的
酸素要求量）が上ってしまい、酸化処理をしなければな
らない。Also, because hydrazine is used, the COD (chemical oxygen demand) of the liquid rises, and it is necessary to oxidize it.
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/
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ニト
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, Pd 5mg /
It is intended to provide a method for recovering Pd, Pt, and Rh from a dinitrodiammine Pd filtrate, which enables recovery of coexisting ammine complexes of Pt and Rh at the same time as well as recovery until the following.
（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ニトロジアン
ミンPd濾液からのPd、Pt、Rhの回収法は、電解槽中にジ
ニトロジアミンPd濾液を収容し、電解にて、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 dinitrodiammine Pd filtrate of the present invention for solving the above problems is to store the dinitrodiamine Pd filtrate in an electrolytic cell, and to perform electrolysis. At Pd, Pt, Rh
Is to be collected.
（実施例） 本発明によるジニトロジアンミンPd濾液からのPd、P
t、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は濾液を撹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はTiにPtをコーティングした網から成
り、陰極４はPd板より成り、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, P from the dinitrodiammine Pd filtrate according to the invention
An example of a method of recovering t and Rh 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 is composed of a net of Pt coated on Ti, and the cathode 4 is composed of a Pd plate and is 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、ジニトロジアンミンPd濾液（初濃度Pd3.8g/）７
を400ml収容し、陽極３と陰極４を電極寸法巾12.5cm、
高さ5cmのものにし且つ極間距離を約1cmとなして、マグ
ネチックスターラ２にて回転して、ジニトロジアンミン
Pd濾液７を撹拌し乍ら、陰極の電極電位を各金属錯体の
析出電位よりも高い2Vとし、陰極電流密度約10A/dm
2（初設定時、液温24℃）で電解した処、第２図のグラ
フに示すようにジニトロジアミンPd濾液７中のPdが経時
的に低下し、４時間経過した時点でPd0.2g/となり、
８時間経過した時点ではPdが1mg/以下となってPd濃度
が著しく低下し、それだけジニトロジアンミンPd濾液７
からPd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, dinitrodiammine Pd filtrate (initial concentration Pd3.8g /) 7
Accommodating 400 ml, the anode 3 and the cathode 4 have an electrode dimension width of 12.5 cm,
With a height of 5 cm and a distance between the poles of about 1 cm, rotate with a magnetic stirrer 2 and dinitrodiammine
While stirring the Pd filtrate 7, the cathode electrode potential was set to 2 V, which was higher than the deposition potential of each metal complex, and the cathode current density was about 10 A / dm.
When electrolyzed at 2 (initial setting, liquid temperature 24 ° C), Pd in dinitrodiamine Pd filtrate 7 decreased with time as shown in the graph of Fig. 2, and Pd 0.2g / Next to
After 8 hours, the Pd concentration became 1 mg / or less and the Pd concentration decreased remarkably, and the dinitrodiammine Pd filtrate 7
From this, it can be seen that Pd was efficiently recovered.
電解によって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 Pd black was suspended in the liquid by the electrolysis, and only a small amount was attached to the cathode 4, and it was immediately removed by rubbing with a finger.
尚、上記実施例ではPdの回収について説明したが、P
t、Rhが含有するジニトロジアンミンPd濾液の場合も同
様にPd、Pt、Rhの電解回収できることは勿論である。ま
たジニトロジアンミン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、ジニトロジアンミンPd濾液
に、NH4 +が50g/以下、Cl-が300g/以下、NO2が60g/
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。Although the recovery of Pd has been described in the above embodiment,
Of course, in the case of the dinitrodiammine Pd filtrate containing t and Rh as well, Pd, Pt, and Rh can be similarly electrolytically recovered. In addition, the ammine complex of Pt and Rh, which coexist in the dinitrodiammine Pd filtrate, can be electrolytically recovered at the same time. The coexisting ions of the ammine complex of Pt and Rh are NH 4 + 50 g / or less, Cl − 300 g / or less, NO 2 60 g / in the dinitrodiammine Pd filtrate.
It is contained below and constitutes an ammine complex with Pt and Rh.
（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
てジニトロジアンミン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、ジニトロジアンミン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、ジニト
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、ジニトロジアミン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, most of Pd, Pt, Rh and the like can be recovered from the dinitrodiammine Pd filtrate and the liquid in which it is dissolved by electrolysis, and dinitro Even when Pt and Rh ammine complexes coexist in the diammine Pd filtrate, these can be recovered simultaneously.
Further, since hydrazine is not used as in the conventional case, the COD of the dinitrodiammine Pd filtrate does not rise and it is not necessary to oxidize it. Therefore, there is an excellent effect that the work of recovering Pd, Pt, Rh, etc. from the dinitrodiamine Pd filtrate can be unmanned and labor-saving.
第１図は本発明によるジニトロジアンミン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ニトロジアンミンPd濾液の
Pd濃度の経時的な変化を示すグラフである。FIG. 1 shows from the dinitrodiammine 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 dinitrodiammine Pd filtrate obtained by the recovery method of the present invention.
It is a graph which shows a time-dependent change of Pd concentration.
Claims (1)
収容し、電解にてPd、Pt、Rhを回収することを特徴とす
るジニトロジアンミンPd濾液からのPd、Pt、Rhの回収
法。1. A method for recovering Pd, Pt, and Rh from a dinitrodiammine Pd filtrate, characterized by containing dinitrodiammine Pd filtrate in an electrolytic cell and recovering Pd, Pt, and Rh by electrolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61098631A JPH086193B2 (en) | 1986-04-28 | 1986-04-28 | Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61098631A JPH086193B2 (en) | 1986-04-28 | 1986-04-28 | Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62256983A JPS62256983A (en) | 1987-11-09 |
| JPH086193B2 true JPH086193B2 (en) | 1996-01-24 |
Family
ID=14224857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61098631A Expired - Lifetime JPH086193B2 (en) | 1986-04-28 | 1986-04-28 | Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH086193B2 (en) |
Family Cites Families (5)
| 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 |
| JPH0699829B2 (en) * | 1986-03-05 | 1994-12-07 | 田中貴金工業株式会社 | Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate |
-
1986
- 1986-04-28 JP JP61098631A patent/JPH086193B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62256983A (en) | 1987-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Meshitsuka et al. | Electrocatalysis by metal phthalocyanines in the reduction of carbon dioxide | |
| GB1505157A (en) | Electrolytic method for treating aqueous radioactive waste solutions | |
| Oishi et al. | Influence of ammonium salt on electrowinning of copper from ammoniacal alkaline solutions | |
| KR880010157A (en) | Electrochemical Substitution of Halogen Atoms in Organic Compounds | |
| US3486992A (en) | Process for electrolytic oxidation of thallium or cerium salts | |
| US4560453A (en) | Efficient, safe method for decoppering copper refinery electrolyte | |
| EP0043854B1 (en) | Aqueous electrowinning of metals | |
| US4627899A (en) | Electrolytic cell and methods combining electrowinning and electrochemical reactions employing a membrane or diaphragm | |
| US3994789A (en) | Galvanic cementation process | |
| US3793165A (en) | Method of electrodeposition using catalyzed hydrogen | |
| JPH086193B2 (en) | Dinitrodiammine Pd Recovery method of Pd, Pt and Rh from filtrate | |
| JP2594802B2 (en) | Electrolytic reduction method | |
| EP0268102A1 (en) | Anode and electrochemical cell for the recovery of metals from aqueous solutions | |
| JPH0699829B2 (en) | Dichlorodiammine Pd Recovery method of Pd, Pt, Rh from filtrate | |
| US3959096A (en) | Electrochemical recovery of copper from alloy scrap | |
| US2485258A (en) | Electrodepositing lead on copper from a nitrate bath | |
| Majima et al. | Electrolytic reduction of U (VI) to U (IV) in acidic chloride and acidic sulfate solutions | |
| US5250166A (en) | Method of recovering palladium by electrolysis and apparatus therefor | |
| JPS6353267B2 (en) | ||
| WO1987006274A1 (en) | Metal recovery | |
| JPS62256985A (en) | Method for recovering pt, pd and rh from dinitrodiammine pt filtrate | |
| JPS62256984A (en) | Method for recovering rh, pt and pd from ammonium rhodium nitrite filtrate | |
| Albert et al. | Copper electrowinning in chloride aqueous solutions | |
| JPS62256986A (en) | Method for recovering pt, pd and rh from ammonium chloroplatinate filtrate | |
| JPH0527712B2 (en) |