JPH0639630B2 - Precious metal recovery method - Google Patents
Precious metal recovery methodInfo
- Publication number
- JPH0639630B2 JPH0639630B2 JP15193485A JP15193485A JPH0639630B2 JP H0639630 B2 JPH0639630 B2 JP H0639630B2 JP 15193485 A JP15193485 A JP 15193485A JP 15193485 A JP15193485 A JP 15193485A JP H0639630 B2 JPH0639630 B2 JP H0639630B2
- Authority
- JP
- Japan
- Prior art keywords
- alkali
- catalyst
- noble metal
- waste
- salt
- 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〕 本発明は例えば還元触媒、食塩の電気分解の際の電極触
媒等の廃棄物から貴金属を回収する方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recovering a noble metal from a waste such as a reduction catalyst and an electrode catalyst for electrolysis of salt.
この種の触媒は例えばチタン，アルミナ，珪藻土等を担
体としてその表面に貴金属をコーティングした構成を有
するものが多い。そして当然ではあるがこのような構成
の触媒は高価であり使用後は貴金属を回収することが必
要となる。Most of this type of catalyst has a structure in which a precious metal is coated on the surface of titanium, alumina, diatomaceous earth or the like as a carrier. And, as a matter of course, the catalyst having such a structure is expensive, and it is necessary to recover the noble metal after use.
従来、このような廃触媒から貴金属を回収するには該廃
触媒を酸化性アルカリ溶融またはピロ硫酸塩溶融し、該
溶融物に酸を加えて溶解し、溶液と不溶残渣とを分け、
溶液に還元性ガスもしくは錯水素化物を作用させる方法
が提案されている（特開昭５２−２０９６３号、特開昭
６０−９２４３３号）。Conventionally, in order to recover a noble metal from such a waste catalyst, the waste catalyst is melted with an oxidizing alkali or pyrosulfate, an acid is added to the melt to dissolve, and a solution and an insoluble residue are separated,
A method of causing a reducing gas or a complex hydride to act on a solution has been proposed (JP-A-52-20963 and JP-A-60-92433).
しかしながら上記従来方法においては高価なアルカリや
ピロ硫酸塩を大量に使用し、かつ高温で溶融するためエ
ネルギーの消費量も大きくかつ装置も大規模なものとな
り、また危険性も高いものである。However, in the above-mentioned conventional method, a large amount of expensive alkali or pyrosulfate is used, and since it melts at a high temperature, the energy consumption is large, the apparatus becomes large-scale, and the danger is high.
本発明は上記従来の問題点を解決する手段として、貴金
属を含有する廃触媒にアルカリもしくはアルカリ塩類の
水溶液を塗布した後、４００℃以上に加熱することによ
って該貴金属を可溶性塩にすることを特徴とする貴金属
回収方法を提供するものである。As a means for solving the above-mentioned conventional problems, the present invention is characterized in that a waste catalyst containing a noble metal is coated with an aqueous solution of an alkali or an alkali salt and then heated to 400 ° C. or higher to make the noble metal a soluble salt. The present invention provides a precious metal recovery method.
本発明を以下に詳細に説明する。The present invention is described in detail below.
本発明の対象とする貴金属を含有する触媒とはチタン，
アルミナ，珪藻土等の担体の表面に貴金属、例えばルテ
ニウム，ロジウム，パラジウム，オスミニウム，イリジ
ウム，白金等をコーティングしたものであり、担体表面
ではこれら貴金属は通常酸化物の形で存在する。このよ
うな構成の触媒は石油化学における酸化還元触媒，自動
車廃ガスの浄化触媒，食塩電気分解の電極触媒等として
用いられる。The noble metal-containing catalyst targeted by the present invention is titanium,
The surface of a carrier such as alumina or diatomaceous earth is coated with a noble metal, such as ruthenium, rhodium, palladium, osmium, iridium or platinum, and the noble metal is usually present in the form of an oxide on the surface of the carrier. The catalyst having such a structure is used as a redox catalyst in petrochemicals, a catalyst for purifying automobile waste gas, an electrode catalyst for electrolysis of salt, and the like.
本発明においては上記触媒の廃棄物の表面にまずアルカ
リもしくはアルカリ塩類の水溶液を塗布する。塗布方法
は浸漬やスプレーによってもよく特に限定はしない。In the present invention, an aqueous solution of alkali or alkali salt is first applied to the surface of the waste of the above catalyst. The application method may be dipping or spraying and is not particularly limited.
本発明に用いられるアルカリとはKOH,NaOH,LiOH等のア
ルカリ金属の水酸化物であり、又アルカリ塩とはKNO3,N
aNO3,LiNO3,K2CO3,Na2CO3,LiCO3,K2S2O7,Na2S2O7,Li2S2
O7,K4P2O7,Na4P2O7,Li4P2O7等の水に溶けてアルカリ性
を示すアルカリ金属の塩である。これらアルカリもしく
はアルカリ塩類として特に望ましいものはKOH,KNO3であ
り、またこれらアルカリもしくはアルカリ塩類は二種以
上混合して用いられてもよい。The alkali used in the present invention is KOH, NaOH, a hydroxide of an alkali metal such as LiOH, and the alkali salt is KNO 3 , N.
aNO 3 , LiNO 3 , K 2 CO 3 , Na 2 CO 3 , LiCO 3 , K 2 S 2 O 7 , Na 2 S 2 O 7 , Li 2 S 2
It is a salt of an alkali metal such as O 7 , K 4 P 2 O 7 , Na 4 P 2 O 7 , Li 4 P 2 O 7 which exhibits alkalinity when dissolved in water. Particularly desirable as these alkalis or alkali salts are KOH and KNO 3 , and two or more kinds of these alkalis or alkali salts may be mixed and used.
上記アルカリもしくはアルカリ塩類は通常１〜１０重量
％程度の水溶液にして上記廃触媒表面に塗布される。The above alkali or alkali salt is usually applied to the surface of the above waste catalyst as an aqueous solution of about 1 to 10% by weight.
上記アルカリもしくはアルカリ塩類水溶液を塗布した廃
触媒は４００℃以上望ましくは５００℃以下に加熱され
る。このような加熱により廃触媒の貴金属はアルカリも
しくはアルカリ塩類と反応して可溶性塩を形成する。チ
タン表面にRuO2をコーティングした廃触媒にKOH40g/,
KNO340g/を含む水溶液をスプレー塗布した後種々の温
度で１０分間熱処理した場合のRuO2可溶化率を第１図に
示す。第１図によれば４００℃以上の加熱でRuO2は略１
００％可溶化することが明らかである。The waste catalyst coated with the aqueous alkali or alkaline salt solution is heated to 400 ° C. or higher, preferably 500 ° C. or lower. By such heating, the noble metal of the waste catalyst reacts with alkali or alkali salts to form a soluble salt. KOH 40g /, for waste catalyst with RuO 2 coating on titanium surface
FIG. 1 shows the RuO 2 solubilization rate when an aqueous solution containing 40 g / KNO 3 was spray-coated and then heat-treated at various temperatures for 10 minutes. According to Fig. 1, RuO 2 is about 1 when heated above 400 ℃.
It is clear that it is solubilized by 00%.
上記処理により可溶化した貴金属は水で抽出され、所望
ならば従来法と同様に還元性ガスもしくは錯水素化物を
作用させることにより金属に還元して回収する。The noble metal solubilized by the above treatment is extracted with water, and if desired, reduced metal is recovered by reacting with a reducing gas or a complex hydride as in the conventional method and recovered.
本発明の作用は下記の通りである。 The operation of the present invention is as follows.
担体表面に貴金属をコーティングした触媒の廃棄物（廃
触媒）にアルカリもしくはアルカリ塩類の水溶液をスプ
レー塗布した後４００℃以上に加熱すると貴金属とアル
カリもしくはアルカリ塩類とが反応して可溶性塩を生成
する。例えばRuO2にKOHとKNO3との混合物を反応させた
場合にはK2RuO4が生成する。When the catalyst waste (waste catalyst) coated with the noble metal on the surface of the carrier is spray-coated with an aqueous solution of an alkali or an alkali salt and then heated to 400 ° C. or higher, the noble metal reacts with the alkali or the alkali salt to form a soluble salt. For example, when RuO 2 is reacted with a mixture of KOH and KNO 3 , K 2 RuO 4 is produced.
したがって本発明では廃触媒から貴金属を分離するため
に大量のアルカリもしくはアルカリ塩類を消費すること
なく、単にアルカリもしくはアルカリ塩類は廃触媒に塗
布するだけであり、また加熱も４００℃程度の低いもの
でありかつ加熱容量も小さくエネルギーの浪費が防止さ
れ、更に装置も大規模なものを必要とせず工程も非常に
簡単化され安全性も高い。Therefore, in the present invention, without consuming a large amount of alkali or alkali salts to separate the noble metal from the waste catalyst, the alkali or alkali salts are simply applied to the waste catalyst, and the heating is low at about 400 ° C. In addition, the heating capacity is small, waste of energy is prevented, the apparatus does not require a large scale, the process is very simple, and the safety is high.
以下に本発明の実施例を示す。 Examples of the present invention will be shown below.
チタン表面にRuO2,IrO2混合物をコーティングした廃触
媒の29.27ｇをとりKOH40g/,K2CO310g/の水溶液を表
面に塗布した後４５０℃で10分間加熱した後可溶化物を
水で抽出する。この際の廃触媒の減量は３０７mgであっ
た。該抽出物を前記した特開昭６０−９２４３３号記載
の方法にしたがって処理したところRu87重量％、Ir3.8
重量％を含む金属粉とRu74重量％、Ir ０重量％を含む
金属酸化物とを得た。29.27 g of the waste catalyst coated with RuO 2 / IrO 2 mixture on the titanium surface was taken, KOH 40 g /, K 2 CO 3 10 g / water solution was applied to the surface, and then the solubilized product was heated with water for 10 minutes at 450 ° C. Extract. At this time, the amount of the waste catalyst reduced was 307 mg. When the extract was treated according to the method described in JP-A-60-92433, Ru87 wt%, Ir3.8
A metal powder containing 70 wt% of Ru and a metal oxide containing 74 wt% of Ru and 0 wt% of Ir were obtained.
第１図はRuO2可溶化率と処理温度とのグラフである。FIG. 1 is a graph of RuO 2 solubilization rate and processing temperature.
Claims (1)
はアルカリ塩類の水溶液を塗布した後、４００℃以上に
加熱することによって該貴金属を可溶性塩にすることを
特徴とする貴金属回収方法1. A method for recovering a noble metal, which comprises applying an aqueous solution of an alkali or an alkali salt to a waste catalyst containing the noble metal and then heating the noble metal to 400 ° C. or higher to make the noble metal a soluble salt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15193485A JPH0639630B2 (en) | 1985-07-10 | 1985-07-10 | Precious metal recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15193485A JPH0639630B2 (en) | 1985-07-10 | 1985-07-10 | Precious metal recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6213540A JPS6213540A (en) | 1987-01-22 |
| JPH0639630B2 true JPH0639630B2 (en) | 1994-05-25 |
Family
ID=15529393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15193485A Expired - Lifetime JPH0639630B2 (en) | 1985-07-10 | 1985-07-10 | Precious metal recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639630B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH086152B2 (en) * | 1986-12-26 | 1996-01-24 | 株式会社徳力本店 | Method for recovering precious metals from fuel cell electrode waste materials |
| JPH01263229A (en) * | 1988-04-14 | 1989-10-19 | Cataler Kogyo Kk | Method of recovering valuable metal from catalyst for cleaning exhaust gas |
| CN1062023C (en) * | 1995-10-13 | 2001-02-14 | 董春岭 | Method for recovering copper and chromium from waste industrial catalyst |
| DE102008006796A1 (en) * | 2008-01-30 | 2009-08-27 | W.C. Heraeus Gmbh | Process for recovering ruthenium from ruthenium or ruthenium oxide-containing materials or ruthenium-containing noble metal ore concentrates |
| CN108525663B (en) * | 2018-05-02 | 2020-12-25 | 福建省福大百阳化工科技有限公司 | Active carbon loaded ruthenium-based ammonia synthesis catalyst and preparation method thereof |
-
1985
- 1985-07-10 JP JP15193485A patent/JPH0639630B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6213540A (en) | 1987-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0048103B1 (en) | Process for the extraction of precious metals from concentrates thereof | |
| EP2240614B1 (en) | Process for the recovery of precious metals from used and/or defective catalytic carriers | |
| JP2003201526A (en) | Method of refining ruthenium | |
| US3999983A (en) | Method of recovering the constituents of catalysts comprising an aluminous carrier, platinum and iridium | |
| US4069040A (en) | Method for recovery of platinum and iridium from catalysts | |
| CA1053913A (en) | Leaching a copper-nickel concentrates | |
| JPH0639630B2 (en) | Precious metal recovery method | |
| JPS58194745A (en) | Recovery of ruthenium | |
| JPS6213542A (en) | Recovering method for metal | |
| JPS6179736A (en) | Recovering method of platinum group metal | |
| JPS6059975B2 (en) | Method for concentrating silver from copper electrolytic slime | |
| JPS6254849B2 (en) | ||
| JPS601369B2 (en) | Separation method | |
| JPS6293319A (en) | Method for selectively recovering sn from sn coated material | |
| JPH0257642A (en) | Method of recovering noble metal from waste catalyst | |
| US3288597A (en) | Process for the recovery of certain metallic and non-metallic constituents of waste slag from reverberatory refining of copper pyritic type ores | |
| JP2002194581A (en) | Method for recovering platinum group metal from metal electrode | |
| JPH02197532A (en) | Method for recovering ru from metallic electrode | |
| JPS57155333A (en) | Method for recovering platinum group metal from residual catalyst | |
| JPH0524207B2 (en) | ||
| JPS63270420A (en) | Method for recovering platinum group metals from platinum group metallic oxide electrode | |
| JPS63222020A (en) | Production of chlororhodium acid | |
| JPH04293552A (en) | Recovery of platinum group metal from metal foil carrier catalyst | |
| GB1474152A (en) | Leaching process for separation of calcium and vanadium oxides | |
| JP3273852B2 (en) | Method for producing ruthenium nitrate solution |