JP2743943B2 - Method for recovering platinum group from metal carrier catalyst - Google Patents
Method for recovering platinum group from metal carrier catalystInfo
- Publication number
- JP2743943B2 JP2743943B2 JP3078689A JP3078689A JP2743943B2 JP 2743943 B2 JP2743943 B2 JP 2743943B2 JP 3078689 A JP3078689 A JP 3078689A JP 3078689 A JP3078689 A JP 3078689A JP 2743943 B2 JP2743943 B2 JP 2743943B2
- Authority
- JP
- Japan
- Prior art keywords
- platinum group
- metal carrier
- catalyst
- metal
- carrier catalyst
- 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
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
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明の方法は金属担体に白金族金属および／又はそ
の酸化物を担持した触媒からチオシアン溶液を用いて白
金族を浸出し金属担体より分離、回収することによる金
属担体触媒からの白金族の回収方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The method of the present invention separates a platinum group metal from a catalyst in which a platinum group metal and / or an oxide thereof is supported on a metal carrier using a thiocyanate solution. The present invention relates to a method for recovering a platinum group from a metal carrier catalyst by recovery.
（従来技術とその問題点） 従来より、ステンレス、Fe、Ni、Al等の金属担体上に
白金、パラジウム、ロジウム、ルテニウム、酸化パラジ
ウム等の白金族を担持した触媒が自動車排ガスの浄化触
媒、燃焼用触媒、脱臭用触媒等に使用されている。(Prior art and its problems) Conventionally, a catalyst in which a platinum group such as platinum, palladium, rhodium, ruthenium, and palladium oxide is supported on a metal carrier such as stainless steel, Fe, Ni, and Al has been used as a catalyst for purifying automobile exhaust gas and burning. It is used as a catalyst for deodorization and a catalyst for deodorization.
このような触媒は、使用中に白金族の活性が低下し、
一定の性能を維持できなくなった際には新しい触媒に取
り替える必要がある。Such catalysts have reduced platinum group activity during use,
When a certain level of performance cannot be maintained, it is necessary to replace the catalyst with a new one.
又、搭載機器の寿命に伴い付随的に発生する。 In addition, it occurs incidentally with the life of the mounted device.
こうした使用剤触媒中には尚相当量の高価な白金族が
残存し、これを回収し有効利用することは工業上重要で
ある。A considerable amount of expensive platinum group remains in such a catalyst, and it is industrially important to recover and effectively use the platinum group.
従来の方法としては、塩酸、王水等に代表される酸溶
解法があるが、これらの方法は金属担体ならびに白金族
も溶解するため、多大な量の薬品を必要とするばかりで
なく、その後の白金族の分離工程で白金族を効率的に分
離回収する為の中和を行うと、金属担体金属の水酸化物
が析出する為、効率が悪く工業的に最適な方法とはいえ
ない。As a conventional method, there are acid dissolving methods represented by hydrochloric acid, aqua regia, and the like.However, since these methods dissolve the metal carrier and the platinum group, not only a large amount of chemicals are required, but also If the neutralization for efficiently separating and recovering the platinum group is performed in the platinum group separation step, a hydroxide of the metal carrier metal is precipitated, which is inefficient and cannot be said to be an industrially optimum method.
（発明の目的） 本発明は、叙上の事情に鑑みなされたもので、その目
的は、金属担体触媒から白金族を簡便かつ効率良く回収
する方法を提供することにある。(Object of the Invention) The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for easily and efficiently recovering a platinum group from a metal carrier catalyst.
（発明の構成） 本発明は、金属担体触媒から白金族を回収する方法に
おいて金属担体に白金族金属および／又はその酸化物を
担持した触媒をチオシアン液に酸化剤を用いた液で浸出
する。(Constitution of the Invention) In the present invention, in a method of recovering a platinum group from a metal carrier catalyst, a catalyst in which a platinum group metal and / or an oxide thereof is supported on a metal carrier is leached with a thiocyanate solution using an oxidizing agent.
チオシアン液を用いると、白金族と特異的に安定な錯
体を形成するため金属担体金属の溶出が抑えられ白金族
を効率良く浸出することができる。When a thiocyanate solution is used, since a stable complex is formed specifically with the platinum group, the elution of the metal carrier metal is suppressed, and the platinum group can be efficiently leached.
金属担体金属の浸出が抑えられている為、その後の白
金族回収で金属担体金属水酸化物の析出が無く白金族を
簡便に回収できることを特徴とする。Since leaching of the metal carrier metal is suppressed, the platinum group can be easily recovered without precipitation of the metal carrier metal hydroxide in the subsequent recovery of the platinum group.
浸出においてはチオシアン液に過酸化水素水等の酸化
剤を用いて行うことが望ましい。過酸化水素水は酸化剤
として働いた後、加熱により浸出液が再使用可能となる
ことや、後に白金族を分離する為の還元工程に悪影響を
及ぼさないので最も有効な酸化剤である。The leaching is desirably performed using an oxidizing agent such as aqueous hydrogen peroxide in the thiocyanate solution. Hydrogen peroxide water is the most effective oxidizing agent because it acts as an oxidizing agent and then does not adversely affect the leachate by heating and does not adversely affect the reduction step for separating the platinum group later.
チオシアン液に硝酸を酸化剤として加えることも有効
であり、これはステンレス系の金属担体の浸出に関し
て、金属担体金属の溶出を抑えながら、しかも白金族の
酸化剤として効率良く働くことによる。水酸化ナトリウ
ムや水酸化カリウム等のアルカリでpH調整し過酸化水素
水等の酸化剤を用いて浸出することも可能である。It is also effective to add nitric acid as an oxidizing agent to the thiocyanate liquid, because the leaching of the stainless metal carrier is suppressed while the metal carrier metal is eluted and works efficiently as a platinum group oxidizing agent. It is also possible to adjust the pH with an alkali such as sodium hydroxide or potassium hydroxide and to leaching using an oxidizing agent such as aqueous hydrogen peroxide.
（実施例１） Fe−20Cr−5Alを酸化処理し、γ−アルミナの触媒活
性層を設けた金属担体に、Pt0.057％、Pd0.059％、Ph0.
018％を担持した触媒3,002.35gをチオシアン15％液５
に入れ、70℃に加熱し、過酸化水素水30％を酸化剤とし
て加えながら一昼夜浸出した。投入した過酸化水素水は
トータル498mlであった。(Example 1) Pt 0.057%, Pd 0.059%, and Ph0.5% were oxidized on Fe-20Cr-5Al and applied to a metal support provided with a catalytically active layer of γ-alumina.
3,002.35 g of a catalyst carrying 018% was added to a 15% thiocyanate solution 5
And heated to 70 ° C., and leached all day long while adding 30% of hydrogen peroxide solution as an oxidizing agent. The total amount of the supplied hydrogen peroxide solution was 498 ml.
その後、液を取り出しSBH還元により白金族を回収し
たところ、Pt、Pd、Rhの回収率は、それぞれ96％、95
％、85％であった。Thereafter, the liquid was taken out and the platinum group was recovered by SBH reduction. The recovery rates of Pt, Pd and Rh were 96% and 95%, respectively.
%, 85%.
（実施例２） Fe−20Cr−5Alを酸化処理し、γ−アルミナの触媒活
性層を設けた金属担体に、Pt0.057％、Pd0.059％、Rh0.
018％を担持した触媒2,963.46gをチオシアン15％硝酸５
％液５に入れ、70℃に加熱し一昼夜浸出した。(Example 2) Fe-20Cr-5Al was oxidized, and a metal support having a γ-alumina catalytically active layer was provided with Pt 0.057%, Pd 0.059%, and Rh0.
2,963.46 g of a catalyst carrying 018% is thiocyan 15% nitric acid 5
% Solution 5 and heated to 70 ° C. and leached all day and night.
その後、液を取り出し、硫化ソーダを添加し白金族を
硫化物として沈澱分離させ、白金族を回収したところ、
Pt、Pd、Rhの回収率は、それぞれ95％、98％、81％であ
った。Then, the liquid was taken out, sodium sulfide was added, and the platinum group was precipitated and separated as sulfide, and the platinum group was recovered.
The recovery rates of Pt, Pd, and Rh were 95%, 98%, and 81%, respectively.
（実施例３） Niの表面にアルミニウムを溶射した後、酸化処理を行
い、その上にγ−アルミナの触媒活性層を設けた金属担
体に、酸化パラジウム2.01％を担持した燃焼用触媒815.
20gをチオシアン15％液４に入れ70℃に加熱し、過酸
化水素水30％を酸化剤として加えながら一昼夜浸出し
た。投入した過酸化水素水はトータル305mlであった。(Example 3) Combustion catalyst 815 in which 2.01% of palladium oxide was supported on a metal carrier on which a surface of Ni was sprayed with aluminum and then oxidized, and a γ-alumina catalytically active layer was provided thereon.
20 g was placed in a 15% thiocyanate solution 4, heated to 70 ° C., and leached all day long while adding 30% of hydrogen peroxide as an oxidizing agent. The total amount of the supplied hydrogen peroxide solution was 305 ml.
その後、液を取り出しSBH還元により回収したとこ
ろ、回収率は97％であった。Thereafter, the liquid was taken out and recovered by SBH reduction, and the recovery rate was 97%.
（従来例） Fe−20Cr−5Alを酸化処理し、γ−アルミナの触媒活
性層を設けた金属担体にPt0.057％、Pd0.059％、Rh0.01
8％を担持した触媒1,392.10gを王水15に入れ70℃に加
熱し４時間溶解した。(Conventional example) Fe-20Cr-5Al is oxidized and Pt 0.057%, Pd 0.059%, Rh 0.01
1,392.10 g of a catalyst supporting 8% was placed in aqua regia 15 and heated to 70 ° C. and dissolved for 4 hours.
溶解液を煮つめ脱硝後、硫化ソーダを添加し白金族を
硫化物として沈澱分離する方法で白金族を回収したとこ
ろPt、Pd、Rhの回収率はそれぞれ91％、93％、65％であ
った。After the solution was boiled and denitrated, the recovery of Pt, Pd, and Rh was 91%, 93%, and 65%, respectively. .
この際、沈澱分離の効率を高める為、pHを高くすると
Feの水酸化物が沈澱してしまい分離操作が不可能とな
る。At this time, if the pH is increased to increase the efficiency of precipitation separation
The hydroxide of Fe precipitates and the separation operation becomes impossible.
（発明の効果） 以上詳述のように、本発明によれば従来例に比し、効
率良く、白金族金属を金属担体より分離回収することが
でき、しかも従来のように浸出に多量の薬品を必要とし
ないことや金属担体金属の水酸化物の沈澱が発生しない
為、経済的にしかも効率良く回収することができるとい
う効果がある。(Effects of the Invention) As described above in detail, according to the present invention, a platinum group metal can be separated and recovered from a metal carrier more efficiently than in a conventional example, and a large amount of chemicals can be leached as in the prior art. Is not required, and the precipitation of hydroxide of the metal carrier metal does not occur, so that there is an effect that it can be recovered economically and efficiently.
Claims (1)
化物を担持した触媒をチオシアン液に酸化剤を用いた液
で浸出し回収することを特徴とする金属担体触媒からの
白金族の回収方法。1. A method for recovering a platinum group from a metal carrier catalyst by leaching and recovering a catalyst having a platinum group metal and / or an oxide thereof supported on a metal carrier with a thiocyanate solution using an oxidizing agent. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3078689A JP2743943B2 (en) | 1989-02-09 | 1989-02-09 | Method for recovering platinum group from metal carrier catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3078689A JP2743943B2 (en) | 1989-02-09 | 1989-02-09 | Method for recovering platinum group from metal carrier catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02209435A JPH02209435A (en) | 1990-08-20 |
| JP2743943B2 true JP2743943B2 (en) | 1998-04-28 |
Family
ID=12313355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3078689A Expired - Lifetime JP2743943B2 (en) | 1989-02-09 | 1989-02-09 | Method for recovering platinum group from metal carrier catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2743943B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013171861A1 (en) | 2012-05-16 | 2013-11-21 | Yarlott Timothy W | Extraction solvent for extracting metallic elements, method for producing same, and method for recovering metallic elements |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3347165A1 (en) * | 1983-12-27 | 1985-07-04 | Skw Trostberg Ag, 8223 Trostberg | METHOD FOR EXTRACTION OF PRECIOUS METALS |
| JPS61238927A (en) * | 1985-04-15 | 1986-10-24 | Daihachi Kagaku Kogyosho:Kk | Method for recovering palladium |
| JPS63166717A (en) * | 1986-12-26 | 1988-07-09 | Tanaka Kikinzoku Kogyo Kk | Recovery of gold |
-
1989
- 1989-02-09 JP JP3078689A patent/JP2743943B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02209435A (en) | 1990-08-20 |
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