JP2008001916A - Method for recovering noble metal, and recovered noble metal - Google Patents

Method for recovering noble metal, and recovered noble metal Download PDF

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JP2008001916A
JP2008001916A JP2006169571A JP2006169571A JP2008001916A JP 2008001916 A JP2008001916 A JP 2008001916A JP 2006169571 A JP2006169571 A JP 2006169571A JP 2006169571 A JP2006169571 A JP 2006169571A JP 2008001916 A JP2008001916 A JP 2008001916A
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metal
tin
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noble metal
layer
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JP5077517B2 (en
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Fumito Tanaka
史人 田中
Takeshi Harada
武 原田
Shigehiko Iwabori
滋彦 岩堀
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Mitsubishi Materials Corp
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    • 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
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for economically and efficiently recovering noble metals from noble-metal-containing wastes etc. <P>SOLUTION: The method for recovering noble metals is characterized in that: a tin-containing substance, such as metal tin and tin oxide, is used as a noble metal absorber; a noble-metal-containing substance, such as automobile exhaust gas purification catalyst wastes and electronic equipment material wastes, is heated and melted together with the tin-containing substance, a reducing agent and a flux to form a molten metal-tin layer and at the same time, the noble metal is eluted and absorbed in the molten metal-tin layer; and then a formed oxide layer is separated to recover the metal tin containing the noble metals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は金、白金、パラジウム等の貴金属を含有する廃棄物等から経済的に効率よく貴金属を回収する方法に関する。 The present invention relates to a method for recovering noble metals economically and efficiently from wastes containing noble metals such as gold, platinum and palladium.

自動車の排ガス浄化用触媒として、耐熱性担体にアルミナ質担持層を形成し、その担持層にＰｔ，Ｐｄ，Ｒｈなどの貴金属を担持させたものが広く知られており、電子基板やリードフレーム等の電子機器部品には導電材料として貴金属が広く使用されている。また、石油化学系触媒として金、白金、パラジウム等の貴金属が広く使用されている。 As a catalyst for exhaust gas purification of automobiles, an alumina support layer is formed on a heat-resistant carrier and a noble metal such as Pt, Pd, Rh is supported on the support layer is widely known. Noble metals are widely used as conductive materials in electronic device parts. In addition, noble metals such as gold, platinum and palladium are widely used as petrochemical catalysts.

従来、これらの使用済み触媒（触媒廃棄物と云う）から貴金属を回収しており、湿式回収方法および乾式回収方法が知られている。湿式回収方法としては触媒廃棄物を酸に溶解して貴金属を浸出させる方法が知られている（特許文献１）。乾式回収方法としては、白金族金属を含む触媒廃棄物を、銅または酸化銅、フラックス、還元剤と共に加熱して溶融金属銅中に白金族金属を吸収させ、次いで溶融金属銅を部分的に酸化して酸化銅層を形成することによって、白金族金属を金属銅中に濃縮させ、酸化銅を分離して、白金族金属を含有する金属銅を回収する方法が知られている（特許文献２，３，４）。また、金属銅に代えて、触媒廃棄物を鉄または鉛と共に加熱して貴金属を鉄鉛に吸収させる方法も知られている。 Conventionally, noble metals are recovered from these used catalysts (referred to as catalyst waste), and wet recovery methods and dry recovery methods are known. As a wet recovery method, a method of dissolving catalyst waste in an acid and leaching a noble metal is known (Patent Document 1). As a dry recovery method, catalyst waste containing platinum group metal is heated with copper or copper oxide, flux, reducing agent to absorb platinum group metal in molten metal copper, and then the molten metal copper is partially oxidized. Then, by forming a copper oxide layer, the platinum group metal is concentrated in the metal copper, the copper oxide is separated, and a method of recovering the metal copper containing the platinum group metal is known (Patent Document 2). , 3, 4). In addition, a method is also known in which catalyst waste is heated together with iron or lead to absorb noble metal in iron lead instead of metallic copper.

従来の湿式回収方法は、酸浸出における貴金属の抽出率が低く、しかも浸出残渣の後処理が面倒である。一方、従来の乾式回収方法において、貴金属の回収手段として金属銅を吸収材として用いているものは、ルテニウムＲｕ等の白金族の一部が銅に対する溶解度が１０％程度と低いため、十分に回収することが難しい。貴金属の吸収材として溶融鉄を用いるものは貴金属の溶解度が低く、また溶融温度が高いと云う問題がある。一方、貴金属の吸収材として溶融鉛を用いるものは、白金族金属の分離回収に必要な高温処理（１２００℃以上）において鉛が激しく揮発し、しかも鉛は環境有害金属であるので取扱いに注意を要し、防塵設備などの大規模な付属設備を必要とするので工業化に適さないと云う問題がある。
特開平０２−１３８４２４号公報 特開平０４−３１７４２３号公報 特開平０４−３１８１２８号公報 特開平０７−２１６４６７号公報 The conventional wet recovery method has a low extraction rate of noble metals in acid leaching, and the post-treatment of the leaching residue is troublesome. On the other hand, in the conventional dry recovery method, those using metal copper as an absorbent as a precious metal recovery means are sufficiently recovered because some of the platinum group such as ruthenium Ru has a low solubility in copper of about 10%. Difficult to do. Those using molten iron as a noble metal absorber have problems that the solubility of the noble metal is low and the melting temperature is high. On the other hand, when using molten lead as a precious metal absorber, lead volatilizes violently at high-temperature treatment (1200 ° C or higher) necessary for the separation and recovery of platinum group metals, and since lead is an environmentally hazardous metal, handle with care. In other words, there is a problem that it is not suitable for industrialization because it requires large-scale auxiliary equipment such as dustproof equipment.
Japanese Patent Laid-Open No. 02-138424 Japanese Patent Laid-Open No. 04-317423 Japanese Patent Laid-Open No. 04-318128 JP 07-216467 A

本発明は、従来の乾式回収方法における上記問題を解決したものであり、金属銅や金属鉛などに代えて、金属スズを吸収材として用い、貴金属を溶融金属スズに吸収させることによって経済的に効率よく回収する方法を提供する。なお、本発明の方法において、金、銀および白金族金属を含めて貴金属と云う。 The present invention solves the above problems in the conventional dry recovery method, and uses metal tin as an absorbent instead of metal copper, metal lead, etc., and economically absorbs noble metal in molten metal tin. Provide an efficient collection method. In the method of the present invention, gold, silver and platinum group metals are referred to as noble metals.

本発明は、以下の技術構成によって上記課題を解決した貴金属の回収方法に関する。
（１）貴金属吸収材としてスズ含有物を用い、貴金属含有物を上記スズ含有物、還元剤、およびフラックスと共に加熱溶融して、金属スズ溶融層を生成させると共に貴金属を溶出させて該貴金属を上記金属スズ溶融層に吸収させ、次いで、生成した酸化物層を分離して貴金属を含有する金属スズを回収することを特徴とする貴金属の回収方法。
（２）貴金属含有物が貴金属を含有する触媒廃棄物、電子機器材料廃棄物である上記(１)の貴金属の回収方法。
（３）スズ含有物が金属スズ、スズ合金、酸化スズ、またはこれら以外のスズ化合物である上記(１)または上記(２)に記載する貴金属の回収方法。
（４）上記(１)〜上記(３)の何れかに記載した方法によって回収した貴金属含有金属スズから貴金属を分離する貴金属の回収方法。
（５）上記(１)〜上記(３)の何れかに記載した方法によって回収した貴金属含有金属スズ、または上記(１)〜上記(３)の何れかに記載した方法によって回収した貴金属含有金属スズから分離した貴金属。 The present invention relates to a method for recovering a noble metal that has solved the above-described problems with the following technical configuration.
(1) A tin-containing material is used as a noble metal absorbent, and the noble metal-containing material is heated and melted together with the tin-containing material, the reducing agent, and the flux to form a metal tin molten layer and the noble metal is eluted to A method for recovering a noble metal, comprising absorbing the metal tin melt layer and then separating the generated oxide layer to recover the metal tin containing the noble metal.
(2) The method for recovering a noble metal according to the above (1), wherein the noble metal-containing material is a catalyst waste containing a noble metal or an electronic equipment material waste.
(3) The method for recovering a noble metal according to (1) or (2) above, wherein the tin-containing material is metal tin, a tin alloy, tin oxide, or a tin compound other than these.
(4) A precious metal recovery method for separating precious metal from precious metal-containing metal tin recovered by the method described in any one of (1) to (3) above.
(5) Noble metal-containing metal tin recovered by the method described in any one of (1) to (3) above, or a noble metal-containing metal recovered by the method described in any of (1) to (3) above Precious metal separated from tin.

本発明の回収方法は、金属スズを貴金属吸収材として用いる方法であり、金、白金、パラジウム、ルテニウム等の貴金属は何れも金属スズに対して十分な溶解性を有するので、触媒廃棄物をスズ含有物と共に還元剤やフラックスを加えて加熱溶融することにより、溶融した貴金属を十分に金属スズに吸収させて効率よく回収することができる。具体的には、例えば、ルテニウムは銅に対しては１０％程度しか溶解しないが、スズには２０％程度まで溶解するので、ルテニウムを効率よく回収することができる。 The recovery method of the present invention is a method using metallic tin as a noble metal absorbent, and noble metals such as gold, platinum, palladium, ruthenium have sufficient solubility in metallic tin, By adding a reducing agent and a flux together with the inclusions and heating and melting, the molten noble metal can be sufficiently absorbed by the metal tin and efficiently recovered. Specifically, for example, ruthenium dissolves only about 10% in copper, but dissolves in tin up to about 20%, so that ruthenium can be efficiently recovered.

本発明の回収方法は、触媒廃棄物や電子機器材料廃棄物など貴金属を含有する材料について広く適用することができる。また、金属スズに限らず、還元剤と共に酸化スズやスズ合金あるはその他のスズ化合物を吸収材として用いることができるので、容易に実施することができ、しかも金属スズや酸化スズ、スズ合金などのスクラップを利用することができるので、経済性に優れる。 The recovery method of the present invention can be widely applied to materials containing noble metals such as catalyst waste and electronic equipment material waste. In addition to metal tin, tin oxide, tin alloys or other tin compounds can be used as an absorbent together with a reducing agent, so that it can be easily implemented, and metal tin, tin oxide, tin alloys, etc. Because it is possible to use the scrap of, it is excellent in economic efficiency.

以下、本発明を実施形態に基づいて具体的に説明する。
本発明の回収方法は、貴金属吸収材としてスズ含有物を用い、貴金属含有物を上記スズ含有物、還元剤、およびフラックスと共に加熱溶融して、金属スズ溶融層を生成させると共に貴金属を溶出させて該貴金属を上記金属スズ溶融層に吸収させ、次いで、生成した酸化物層を分離して貴金属を含有する金属スズを回収することを特徴とする貴金属の回収方法である。 Hereinafter, the present invention will be specifically described based on embodiments.
The recovery method of the present invention uses a tin-containing material as a noble metal absorbent, heats and melts the noble metal-containing material together with the tin-containing material, the reducing agent, and the flux to generate a metal tin molten layer and elute the noble metal. The noble metal is absorbed into the molten metal tin layer, and then the produced oxide layer is separated to recover metal tin containing the noble metal.

貴金属含有物としては、貴金属を含有する触媒廃棄物、電子機器材料廃棄物などを用いることができる。貴金属を含有する触媒廃棄物には自動車の排ガス浄化用触媒や石油化学触媒がある。例えば、一般に自動車排ガス浄化用触媒には概ねＰｔが１０００ppm、Ｐｄが６００〜７００ppm、Ｒｈが１００〜２００ppm含まれており、石油化学触媒には概ねＰｔが４０００ppm、Ｒｕが２００００ppm含まれている。また、電極やペーストなどの廃棄物にはＰｔ，Ｒｕ，Ｉｒ等が数１０００ppm含まれている。本発明の回収方法は、これらの各種の貴金属含有物に対して広く適用することができる。 As the noble metal-containing material, catalyst waste containing noble metal, electronic device material waste, or the like can be used. Catalyst waste containing precious metals includes automobile exhaust gas purification catalysts and petrochemical catalysts. For example, a catalyst for purification of automobile exhaust gas generally contains 1000 ppm of Pt, 600 to 700 ppm of Pd, and 100 to 200 ppm of Rh, and a petrochemical catalyst generally contains 4000 ppm of Pt and 20000 ppm of Ru. In addition, waste such as electrodes and paste contains several thousand ppm of Pt, Ru, Ir and the like. The recovery method of the present invention can be widely applied to these various precious metal-containing materials.

スズ含有物としては、金属スズ、スズ合金、酸化スズ、またはこれら以外のスズ化合物を用いることができる。還元剤と共にスズ合金、酸化スズ、またはこれら以外のスズ化合物を加熱溶融すれば、スズ成分が還元されて金属スズの融体が形成されるので、金属スズに限らずにスズ合金、酸化スズなどを用いることができる。 As the tin-containing material, metal tin, tin alloy, tin oxide, or other tin compounds can be used. If a tin alloy, tin oxide, or a tin compound other than these is heated and melted together with a reducing agent, the tin component is reduced to form a melt of metal tin, so that not only metal tin but also tin alloy, tin oxide, etc. Can be used.

貴金属含有物をスズ含有物と共に還元剤を加えて溶融炉に入れ加熱溶融し、好ましくは還元剤と共にフラックスを加えて加熱溶融する。貴金属含有物とスズ含有物の量は溶融した貴金属が溶融金属スズに十分に吸収される量であればよい。また、還元剤としてはコークスなどの炭素材料を用いればよい。フラックスとしては珪砂、炭酸カルシウム、酸化鉄などを用いればよい。加熱温度は貴金属含有物およびスズ含有物が溶融する温度である。 A noble metal-containing material is added with a tin-containing material and a reducing agent is added to a melting furnace, and is heated and melted. The amount of the noble metal-containing material and the tin-containing material may be an amount that allows the molten noble metal to be sufficiently absorbed by the molten metal tin. Further, a carbon material such as coke may be used as the reducing agent. As the flux, silica sand, calcium carbonate, iron oxide or the like may be used. The heating temperature is a temperature at which the noble metal-containing material and the tin-containing material melt.

加熱処理によって金属スズ溶融層が生成し、さらに触媒廃棄物等の貴金属含有物を還元剤と共に加熱溶融することによって、触媒廃棄物等に含有されている貴金属が還元されて溶出し、生成した溶融金属スズに吸収される。一方、酸化スズやその他の酸化物（スラグ層）は金属融体より比重が小さく、溶融金属スズ層の上に生成する。溶出した貴金属はスラグ層には殆ど移行せず、下層の溶融金属スズ層に移行して吸収されるので、溶融炉を傾けて上側のスラグ層を流し出し、あるいは溶融炉を設置したままスラグ層を湯面から掻き出し、溶融金属スズ層から分離する。 The metal tin melt layer is generated by heat treatment, and the precious metal content such as catalyst waste is heated and melted together with the reducing agent, so that the precious metal contained in the catalyst waste is reduced and eluted, and the generated melt Absorbed by metallic tin. On the other hand, tin oxide and other oxides (slag layer) have a specific gravity smaller than that of the metal melt and are formed on the molten metal tin layer. The eluted noble metal hardly migrates to the slag layer, but migrates to the lower molten metal tin layer and is absorbed, so the slag layer is tilted out and the upper slag layer is poured out or the melting furnace is still installed Is scraped off from the molten metal surface and separated from the molten metal tin layer.

溶融金属スズ層上側のスラグ層を分離除去した後に、溶融金属スズ層に空気を吹き込み、あるいは酸化剤を加えて酸化スズ層を形成し、この酸化スズ層を分離除去することによって、溶融金属スズ層の容量を減じ、溶融金属スズ層に含まれている貴金属の濃度を相対的に高めることができる。また、溶融金属スズの酸化処理を行うことによって、溶融金属スズに含まれている卑成分がスラグ化して除去される。除去したスラグ層は加熱溶融工程に戻して再利用することができる。スラグの再利用によって、不可避的にスラグに随伴した貴金属を溶融金属スズに吸収させて回収率を高めることができる。 After separating and removing the slag layer on the upper side of the molten metal tin layer, air is blown into the molten metal tin layer, or an oxidizing agent is added to form a tin oxide layer. The volume of the layer can be reduced, and the concentration of the noble metal contained in the molten metal tin layer can be relatively increased. Moreover, the base component contained in molten metal tin is slag-ized and removed by oxidizing molten metal tin. The removed slag layer can be recycled by returning to the heating and melting step. By recycling the slag, it is unavoidable that the precious metal accompanying the slag is absorbed by the molten metal tin and the recovery rate can be increased.

スラグ層を分離除去した後に溶融金属スズ層を回収する。この溶融金属スズには触媒廃棄物等から溶出した貴金属が吸収されている。回収し冷却した貴金属含有金属スズは、金属スズ結晶の間に貴金属結晶が点在した組織、あるいは貴金属とスズが合金化した結晶から構成される組織を有している。この含有されている貴金属は電解精製または酸溶解などの方法によって金属スズから分離することができる。 After the slag layer is separated and removed, the molten metal tin layer is recovered. The molten metal tin absorbs the noble metal eluted from the catalyst waste. The recovered and cooled noble metal-containing metal tin has a structure in which noble metal crystals are interspersed between metal tin crystals, or a structure composed of crystals in which noble metals and tin are alloyed. The contained noble metal can be separated from the metallic tin by a method such as electrolytic purification or acid dissolution.

〔実施例１〕
化学工業用触媒廃棄物１０００kgを、金属スズ１００kgと共に溶融炉に装入し、還元剤（コークス）５０kg、およびフラックス（珪砂９５５kg、炭酸カルシウム１３４０kg、酸化鉄５６５kg）を加え、１４００℃で、４時間加熱して装入物の全量を溶融した。次いで、生成したスラグ層を除去した後に、溶融金属層に空気を吹き込んで酸化スズのスラグ層を形成し、これを除去した後に、溶融金属層１２５kgを回収した。回収した金属層の成分を表１に示した。 [Example 1]
1000 kg of catalyst waste for chemical industry is charged into a melting furnace together with 100 kg of metallic tin, and 50 kg of reducing agent (coke) and flux (silica sand 955 kg, calcium carbonate 1340 kg, iron oxide 565 kg) are added at 1400 ° C. for 4 hours. The whole charge was melted by heating. Next, after removing the generated slag layer, air was blown into the molten metal layer to form a tin oxide slag layer. After removing this, 125 kg of the molten metal layer was recovered. The components of the recovered metal layer are shown in Table 1.

〔実施例２〕
金属スズに代えて酸化スズ１１４kgを用いた他は表１に示す条件に従い、実施例１と同様にして溶融金属層１２５kgを回収した。回収した金属層の成分を表１に示した。 [Example 2]
125 kg of the molten metal layer was recovered in the same manner as in Example 1 except that 114 kg of tin oxide was used instead of metal tin according to the conditions shown in Table 1. The components of the recovered metal layer are shown in Table 1.

〔実施例３〕
金属スズに代えてスズ合金（スズ９０wt％、鉄１０wt％）１１２kgを用いた他は表１に示す条件に従い、実施例１と同様にして溶融金属層１３７kgを回収した。回収した金属層の成分を表１に示した。 Example 3
A molten metal layer 137 kg was recovered in the same manner as in Example 1 except that 112 kg of tin alloy (90 wt% of tin, 10 wt% of iron) 112 kg was used instead of metal tin. The components of the recovered metal layer are shown in Table 1.

〔実施例４〕
自動車排ガス浄化用触媒廃棄物に代えて電子機器材料廃棄物１０００kgを用いた他は表１に示す条件に従い、実施例１と同様にして溶融金属層１２５kgを回収した。回収した金属層の成分を表１に示した。 Example 4
125 kg of the molten metal layer was recovered in the same manner as in Example 1 except that 1000 kg of electronic device material waste was used instead of the automobile exhaust gas purification catalyst waste according to the conditions shown in Table 1. The components of the recovered metal layer are shown in Table 1.

〔比較例１〕
金属スズに代えて金属銅１００kgを用いた他は表１に示す条件に従い、実施例１と同様にして溶融金属層１１０kgを回収した。回収した金属層の成分を表１に示した。 [Comparative Example 1]
110 kg of the molten metal layer was recovered in the same manner as in Example 1 except that 100 kg of metal copper was used instead of metal tin according to the conditions shown in Table 1. The components of the recovered metal layer are shown in Table 1.

〔比較例２〕
金属スズに代えて金属鉛１００kgを用いた他は表１に示す条件に従い、実施例１と同様にして溶融金属層１２５kgを回収した。回収した金属層の成分を表１に示した。 [Comparative Example 2]
125 kg of the molten metal layer was recovered in the same manner as in Example 1 except that 100 kg of metal lead was used instead of metal tin according to the conditions shown in Table 1. The components of the recovered metal layer are shown in Table 1.

表１に示すように、本発明の実施例１〜４では、回収した金属スズに含まれている白金族金属の濃度が高く、特にルテニウム(Ｒｕ)濃度は２０wt％と高く、効率良く白金族金属を回収することができる。
一方、比較例１の回収金属銅中のルテニウム(Ｒｕ)濃度は１０wt％であり、本発明の実施例に比較して大幅に低い。また、比較例２の回収金属鉛中の白金族金属濃度は２０％であるが鉛の揮発が激しく、煙道および電気集塵機がダストで閉塞した。 As shown in Table 1, in Examples 1 to 4 of the present invention, the concentration of the platinum group metal contained in the recovered metal tin is high, in particular, the ruthenium (Ru) concentration is as high as 20 wt%, and the platinum group is efficiently obtained. Metal can be recovered.
On the other hand, the ruthenium (Ru) concentration in the recovered metal copper of Comparative Example 1 is 10 wt%, which is significantly lower than that of the example of the present invention. Moreover, although the platinum group metal density | concentration in the collection | recovery metal lead of the comparative example 2 is 20%, volatilization of lead was intense and the flue and the electric dust collector were obstruct | occluded with dust.

Figure 2008001916
Figure 2008001916

Claims (5)

貴金属吸収材としてスズ含有物を用い、貴金属含有物を上記スズ含有物、還元剤、およびフラックスと共に加熱溶融して、金属スズ溶融層を生成させると共に貴金属を溶出させて該貴金属を上記金属スズ溶融層に吸収させ、次いで、生成した酸化物層を分離して貴金属を含有する金属スズを回収することを特徴とする貴金属の回収方法。
Using a tin-containing material as a precious metal absorber, the precious metal-containing material is heated and melted together with the tin-containing material, the reducing agent, and the flux to form a molten metal tin layer and elute the precious metal to melt the precious metal into the metal tin. A method for recovering a noble metal, comprising absorbing a layer and then separating the generated oxide layer to recover metal tin containing a noble metal.
貴金属含有物が貴金属を含有する触媒廃棄物、電子機器材料廃棄物である請求項１の貴金属の回収方法。
The method for recovering a noble metal according to claim 1, wherein the noble metal-containing material is a catalyst waste containing an noble metal or an electronic equipment material waste.
スズ含有物が金属スズ、スズ合金、酸化スズ、またはこれら以外のスズ化合物である請求項１または２に記載する貴金属の回収方法。
The method for recovering a noble metal according to claim 1 or 2, wherein the tin-containing material is metal tin, tin alloy, tin oxide, or other tin compound.
請求項１〜請求項３の何れかに記載した方法によって回収した貴金属含有金属スズから貴金属を分離する貴金属の回収方法。
A method for recovering a precious metal, wherein the precious metal is separated from the precious metal-containing metal tin recovered by the method according to any one of claims 1 to 3.
請求項１〜請求項３の何れかに記載した方法によって回収した貴金属含有金属スズ、または請求項１〜請求項３の何れかに記載した方法によって回収した貴金属含有金属スズから分離した貴金属。


The noble metal containing metal tin collect | recovered by the method in any one of Claims 1-3, or the noble metal isolate | separated from the noble metal containing metal tin collect | recovered by the method in any one of Claims 1-3.


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Cited By (5)

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JP2009179839A (en) * 2008-01-30 2009-08-13 Mitsubishi Materials Corp Method for recovering noble metal
WO2009107647A1 (en) * 2008-02-27 2009-09-03 独立行政法人産業技術総合研究所 Process for the recovery of metal
JP2011225979A (en) * 2010-03-31 2011-11-10 National Institute Of Advanced Industrial Science & Technology Metal component collection agent and method for collecting metal component
US8979974B2 (en) 2008-10-09 2015-03-17 National Institute Of Advanced Industrial Science And Technology Composition for collecting metal component
CN108823418A (en) * 2018-08-23 2018-11-16 贵研资源（易门）有限公司 The method of spent auto-catalysts collaboration recycling noble metal

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JP2003301225A (en) * 2002-04-11 2003-10-24 Asahi Pretec Corp Method for recovering noble metal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003301225A (en) * 2002-04-11 2003-10-24 Asahi Pretec Corp Method for recovering noble metal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009179839A (en) * 2008-01-30 2009-08-13 Mitsubishi Materials Corp Method for recovering noble metal
WO2009107647A1 (en) * 2008-02-27 2009-09-03 独立行政法人産業技術総合研究所 Process for the recovery of metal
US8568509B2 (en) 2008-02-27 2013-10-29 National Institute Of Advanced Industrial Science And Technology Method of recovering metal
JP5339302B2 (en) * 2008-02-27 2013-11-13 独立行政法人産業技術総合研究所 Metal recovery method
US8979974B2 (en) 2008-10-09 2015-03-17 National Institute Of Advanced Industrial Science And Technology Composition for collecting metal component
JP2011225979A (en) * 2010-03-31 2011-11-10 National Institute Of Advanced Industrial Science & Technology Metal component collection agent and method for collecting metal component
US8623113B2 (en) 2010-03-31 2014-01-07 National Institute Of Advanced Industrial Science And Technology Metal component collection agent and method for collecting metal component
CN108823418A (en) * 2018-08-23 2018-11-16 贵研资源（易门）有限公司 The method of spent auto-catalysts collaboration recycling noble metal

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