KR101224503B1 - Method for recovering platinum group matals from platinum group matals industrial waste - Google Patents
Method for recovering platinum group matals from platinum group matals industrial waste Download PDFInfo
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Abstract
본 발명은 백금족 금속(백금(Pt), 루테늄(Ru), 오스뮴(Os), 로듐(Rh), 이리듐(Ir), 팔라듐(Pd))을 함유한 산업폐기물로부터 백금족을 침출하여, 침출액 내 백금족 금속이온을 흡착제에 흡착한 후 흡착제에 붙어 있는 백금족 금속이온을 탈착제로 탈착하여 고농도 백금족 금속이온 혼합용액으로 회수할 수 있으며, 또한, 백금족 금속이온이 붙어 있는 흡착제를 회화(灰化, ashing)하여 백금족 금속이온을 금속형태(Metallic form)로 회수할 수도 있다. 또한, 회화공정 후 백금족 금속으로 혼합되어 있는 재(Ash)로부터 용해과정을 통해 용해되는 백금은 고농도의 백금이온으로 회수되고 용해되지 않는 루테늄은 금속형태로 분리할 수 있다.The present invention leaches the platinum group from the industrial waste containing the platinum group metal (platinum (Pt), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd)), platinum group in the leachate After adsorbing metal ions to the adsorbent, the platinum group metal ions attached to the adsorbent can be desorbed with a desorbent to recover the high concentration platinum group metal ion mixed solution.In addition, the adsorbent with platinum group metal ions is sintered to ash. Platinum group metal ions may be recovered in a metallic form. In addition, the platinum dissolved through the melting process from ash mixed with the platinum group metal after the incineration process is recovered as a high concentration of platinum ions, and ruthenium that is not dissolved may be separated into a metal form.
Description
본 발명은 백금족 금속{platinum group matals}이 함유된 각종 산업폐기물로부터 백금족 금속을 분리하여 회수하는 방법에 관한 것이다.
The present invention relates to a method for separating and recovering a platinum group metal from various industrial wastes containing platinum group metals.
백금족 금속{platinum group matals}은 전이금속 중 백금(Pt), 루테늄(Ru), 오스뮴(Os), 로듐(Rh), 이리듐(Ir), 팔라듐(Pd)을 말한다. 백금족 금속은 용해온도가 매우 높고, 화학적 침식에 대한 내식성이 뛰어날 뿐만 아니라, 환원 촉매작용 등 독특한 화학적 특성을 갖고 있다. Platinum group matals refer to platinum (Pt), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), and palladium (Pd) among transition metals. Platinum group metals have a very high melting temperature, excellent corrosion resistance to chemical erosion, and have unique chemical characteristics such as reduction catalysis.
백금족 금속의 세계 년 평균 생산량은 200 톤 정도로서, 90이상이 남아프리카공화국과 구 소련에서 생산되고 있으며, 캐나다가 약 6, 남미, 미국, 호주 일본 등지에서 소량 생산되고 있다. 이들 백금족 금속은 백금족 금속 회로 등의 전기전자산업 분야 외에 자동차용 촉매와 석유화학공업용 촉매로 이용되고 있다. 이들 촉매와 부품은 사용하는 시간이 경과함에 따라 그 성능이 저하되고 최종적으로 수명을 다하여 폐기되지만, 특히 백금족 금속은 고가이며 전량을 수입하고 있기 때문에 이를 회수하여 재이용하는 것이 경제적으로 크게 이로울 뿐만 아니라, 자원의 유효한 활용에 큰 역할을 할 수 있다.The global average annual production of platinum group metals is around 200 tonnes, more than 90 of which are produced in South Africa and the former Soviet Union, with Canada producing a small amount in about 6, South America, the United States, Australia and Japan. These platinum group metals are used as catalysts for automobiles and petrochemical industries, as well as in the field of electrical and electronic industries such as platinum group metal circuits. These catalysts and components are degraded over time, and eventually discarded at the end of their lifetime, but especially since platinum group metals are expensive and imported in their entirety, it is not only economically beneficial to recover and reuse them. This can play a large role in the effective use of resources.
종래 백금족 금속의 회수 방법은 침출 후 혼합되어 있는 백금족 이온 용액을 선택성이 있는 추출제를 사용하여 용매추출을 한 후 선택적으로 추출된 백금족 금속이온을 탈거제를 이용하여 탈거를 하고 백금족 금속이온을 환원제를 사용하여 백금족 금속형태로 환원시켜 주는 방법이 이용되고 있다. 그러나, 백금족 금속마다 사용되는 추출제, 탈거제, 환원제가 다르며 매우 복잡하고 긴 공정으로 회수 효율이 매우 낮다는 문제가 있으며, 또한 종래 기술에서 백금족에 선택성을 갖는 추출제는 매우 고가이고 선택성이 좋지 않아 추출효율이 매우 낮은 문제도 있다.
Conventional methods for recovering platinum group metals include leaching the mixed platinum group ions solution using a selective extractant and then selectively removing the extracted platinum group metal ions using a stripping agent and reducing the platinum group metal ions. Using a method to reduce to a platinum group metal form is used. However, the extractant, stripping agent, and reducing agent used for each platinum group metal are different, and there is a problem that the recovery efficiency is very low due to a very complicated and long process. Also, in the prior art, an extractant having a selectivity to the platinum group is very expensive and has good selectivity. There is also a problem that the extraction efficiency is very low.
본 발명은 종래 백금족 금속의 회수 방법보다고 매우 단순하고 부산물이 거의 발생하지 않으며 회수효율도 매우 높은 새로운 백금족 금속의 회수 방법을 제공하고자 하는 것을 그 목적으로 한다.
It is an object of the present invention to provide a new method for recovering a platinum group metal, which is much simpler than the conventional method for recovering a platinum group metal, almost no by-products are generated, and a recovery efficiency is also very high.
전술한 목적을 달성하기 위한 본 발명의 폐기물로부터 백금족 금속을 회수하는 방법은, (a) 백금족 금속 함유 폐기물을 용해하여 침출하는 단계, (b) 침출된 폐기물에서 흡착제를 이용하여 백금족 금속이온을 흡착하는 단계, (c) 상기 흡착제를 회화(灰化, ashing)하여 상기 백금족 금속이온을 금속형태로 회수하는 단계를 포함하여 이루어진다.The method for recovering the platinum group metal from the waste of the present invention for achieving the above object comprises the steps of: (a) dissolving and leaching the platinum group metal containing waste; (b) adsorbing the platinum group metal ion using an adsorbent from the leached waste. And (c) recovering the platinum group metal ions in the form of a metal by sintering the adsorbent.
이로써, 매우 단순한 공정으로 금속형태로 백금족 금속을 회수할 수 있다.Thereby, the platinum group metal can be recovered in the form of metal in a very simple process.
또한, 상기 (c) 단계 후에, 재(ash)를 용해하여 용해되는 백금은 용액 내 이온형태로 회수하고 용해되지 않는 루테늄은 금속형태로 각각 분리하여 회수하는 단계를 더 진행될 수 있다. 이 단계를 통하여 백금은 이온형태로 루테늄은 금속형태로 각각 분리하여 회수할 수 있다.In addition, after the step (c), the platinum dissolved by dissolving the ash (ash) is recovered in the form of ions in the solution, and insoluble ruthenium may be further separated and recovered in the form of metal, respectively. Through this step, platinum can be recovered separately from ions and ruthenium into metals.
또한, 상기 (b) 단계 후에, 흡착제에 붙어 있는 백금족 금속이온을 탈착제로 탈착하여 고농도 백금족 금속이온 혼합용액으로 회수하는 단계가 진행될 수도 있다.
In addition, after the step (b), the step of desorbing the platinum group metal ions attached to the adsorbent with a desorbent may be recovered to a high concentration platinum group metal ion mixed solution.
본 발명은 종래 백금족 금속의 회수 방법보다고 매우 단순하고 부산물이 거의 발생하지 않으며 회수효율도 매우 높은 새로운 백금족 금속의 회수 방법을 제공한다.
The present invention provides a method for recovering a new platinum group metal, which is much simpler than the conventional method for recovering a platinum group metal, almost no by-products are generated, and a recovery efficiency is also very high.
도 1은 본 발명에 따른 백금족 금속의 분리, 농축, 회수 공정도이다.
도 2는 침출액에서 이온교환수지를 이용한 백금족 금속이온의 흡착성능을 나타내는 그래프이다.
도 3 ~ 도 6은 본 발명에 따른 각 단계에서의 SEM 사진 및 EDX 분석 그래프이다.
도 7 및 도 8은 본 발명에 따른 각 단계에서의 XPS 분석 그래프이다.1 is a process diagram for separating, concentrating and recovering a platinum group metal according to the present invention.
2 is a graph showing the adsorption performance of platinum group metal ions using ion exchange resin in the leachate.
3 to 6 are SEM photographs and EDX analysis graphs at each step according to the present invention.
7 and 8 are XPS analysis graphs at each step according to the present invention.
이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 상세하게 설명한다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 백금족 금속의 분리, 농축, 회수 공정도이다.1 is a process diagram for separating, concentrating and recovering a platinum group metal according to the present invention.
본 발명은 백금족 금속(백금(Pt), 루테늄(Ru), 오스뮴(Os), 로듐(Rh), 이리듐(Ir), 팔라듐(Pd))을 함유한 산업 폐기물(연료전지 스택, 자동차 촉매, 화학촉매, 전자스크랩 등)로부터 백금족을 침출하여(침출공정), 침출액 내 백금족 금속이온을 흡착제에 흡착한다(흡착공정). Industrial waste (fuel cell stack, automotive catalyst, chemical) containing platinum group metals (platinum (Pt), ruthenium (Ru), osmium (Os), rhodium (Rh), iridium (Ir), palladium (Pd)) The platinum group is leached from the catalyst, the electron scrap, and the like (leaching step) to adsorb the platinum group metal ions in the leaching solution to the adsorbent (adsorption step).
흡착공정 후 흡착제에 붙어 있는 백금족 금속이온을 탈착제로 탈착하여 고농도 백금족 금속이온 혼합용액으로 회수할 수 있으며(탈착공정), 또한, 백금족 금속이온이 붙어 있는 흡착제를 회화(灰化, ashing)하여 백금족 금속이온을 금속형태(Metallic form)로 회수할 수도 있다(회화공정). 또한, 회화공정 후 백금족 금속으로 혼합되어 있는 재(Ash)로부터 용해과정을 통해 용해되는 백금은 고농도의 백금이온으로 회수되고 용해되지 않는 루테늄은 금속형태로 분리할 수 있다(용해 공정).After the adsorption process, the platinum group metal ions attached to the adsorbent can be desorbed and recovered with a high concentration of the platinum group metal ion mixture solution (desorption process) .The platinum group metal ions are sintered to sinter the platinum group metal ions. Metal ions can also be recovered in metallic form (painting process). In addition, platinum dissolved in the ash (ash) mixed with the platinum group metal after the incineration process is recovered as a high concentration of platinum ions, and ruthenium that is not dissolved may be separated into a metal form (dissolution process).
이러한 본 발명은 크게 3가지로 첫째, 저농도의 백금족 금속이온 침출액으로부터 흡착제를 이용하여 고농도 백금족 금속이온으로 회수하는 기술. 둘째, 백금족 금속이온을 백금족 금속형태로 회수하는 기술. 셋째, 백금족 금속형태로 회수된 백금족 혼합금속으로부터 각 백금족 금속을 분리하는 기술에 관한 것이다.The present invention is largely three, first, a technique for recovering the high concentration of platinum group metal ions using an adsorbent from a low concentration of platinum group metal ion leaching solution. Second, the technology to recover the platinum group metal ions in the form of platinum group metal. Third, the present invention relates to a technique for separating each platinum group metal from the platinum group mixed metal recovered in the form of platinum group metal.
종래기술에서 언급한 기존 백금족 금속의 회수 기술은 백금족 금속마다 사용되는 추출제, 탈거제, 환원제가 다르며 매우 복잡하고 긴 공정으로 회수 효율이 매우 낮고, 백금족에 선택성을 갖는 추출제는 매우 고가이고 선택성이 좋지 않아 추출효율이 매우 낮은데 반해, 본 발명은 기존 백금족 회수공정과 비교하여 매우 단순한 공정이고 부산물이 거의 발생하지 않고 회수효율도 매우 높다. Conventional platinum group metal recovery techniques mentioned in the prior art have different extraction agents, stripping agents, and reducing agents used for each platinum group metal, and have very low recovery efficiency due to a very complicated and long process, and an extractant having selectivity for platinum groups is very expensive and selectivity. In contrast, the extraction efficiency is very low, whereas the present invention is a very simple process compared to the existing platinum group recovery process, and almost no by-products are generated and the recovery efficiency is also very high.
이하에서는 본 발명의 일실시예에 따라 상세히 설명한다.Hereinafter will be described in detail according to an embodiment of the present invention.
침출공정에서는, 백금족 금속을 함유한 폐기물을 분쇄하고 선별한 후 왕수(aqua regia), 염산, 할로겐화합물, 가용성염 형성 등을 이용하여 용해하여 침출시킨다. 산에 난용성인 백금족 금속은 산화제의 존재하에 염산에 의해 용해된다. 산화제로는 질산, 과산화수소, 염소가스, 하이포염소산(HOCl), 차염소산소다(NaOCl) 등이 있다. 일실시예로서 연료전지 스택을 침출액(7M 염산(HCl)+5M 차염소산소다(NaOCl))으로 침출한 침출액 내 백금족 금속(백금(Pt), 루테늄(Ru))의 농도를 표 1에서 보여주고 있다. 상기 백금족 금속 착화합물은 전하를 띄는데 바람직하게는 음이온성을 나타낸다.In the leaching process, wastes containing platinum group metals are pulverized and sorted, and then dissolved and leached using aqua regia, hydrochloric acid, halogen compounds, soluble salts, and the like. Platinum group metals that are poorly soluble in acids are dissolved by hydrochloric acid in the presence of an oxidizing agent. Oxidizing agents include nitric acid, hydrogen peroxide, chlorine gas, hypochloric acid (HOCl), sodium hypochlorite (NaOCl), and the like. As an example, the concentration of the platinum group metals (platinum (Pt) and ruthenium (Ru)) in the leachate leaching the fuel cell stack with the leachate (7M hydrochloric acid (HCl) + 5M sodium hypochlorite (NaOCl)) is shown in Table 1. have. The platinum group metal complex is charged and preferably anionic.
흡착공정에서는 침출액 내 백금족 금속이온을 흡착제를 이용하여 흡착시키는데, 흡착제로는 이온교환수지, 활성탄, 생체흡착소재 등 이용되는 것이 바람직하다.In the adsorption step, the platinum group metal ions in the leachate are adsorbed using an adsorbent, and the adsorbent is preferably used such as an ion exchange resin, activated carbon, and a bioadsorption material.
도 2는 일실시예로서 침출액에서 이온교환수지를 이용한 백금족 금속이온의 흡착성능을 나타내고 있는데, 침출액의 백금족 금속이온 흡착에 사용한 이온교환수지는 강염기성 음이온교환수지로 Amberjet-4400(Cl)를 사용하였다. 이온교환수지의 반응기는 quaternary amine으로 수용액에서 양전하를 띄고 있다. 백금족 금속 침출 수용액에서 음전하를 띄고 있는 백금족 금속이온과 정전기적 인력에 의해 이온교환수지에 흡착하여 회수할 수 있게 된다.Figure 2 shows the adsorption performance of the platinum group metal ions using the ion exchange resin in the leachate as an example, the ion exchange resin used for adsorption of the platinum group metal ion of the leachate using Amberjet-4400 (Cl) as a strong base anion exchange resin It was. The reactor of ion exchange resin is quaternary amine, which shows positive charge in aqueous solution. It is possible to adsorb and recover the ion exchange resin by the platinum group metal ions and the electrostatic attraction in the platinum group metal leaching aqueous solution.
탈착공정에서는 흡착제에 붙어 있는 백금족 금속이온을 탈착제로 탈착하여 고농도로 농축된 백금족 금속이온 혼합용액으로 회수되게 된다. 상기 탈착공정은 강산(염산, 질산 및 황산) 단독으로 사용되거나 thiourea와 강산의 혼합용액에 넣어 탈착할 수 있다.In the desorption process, the platinum group metal ions adhering to the adsorbent are desorbed with a desorbent to be recovered as a highly concentrated platinum group metal ion mixed solution. The desorption process may be used alone with strong acids (hydrochloric acid, nitric acid and sulfuric acid) or desorbed in a mixed solution of thiourea and strong acid.
한편 회화공정을 통해 백금족 금속이온이 붙어 있는 흡착제를 연소시켜 재로 만들게 되면 재 표면에는 백금족 금속이 금속형태(metallic form)로 존재하게 되어 금속형태로 회수가 가능하다.On the other hand, when the adsorbents attached with platinum group metal ions are burned to ashes through the incineration process, the platinum group metals are present in the metallic form on the surface of the ash and can be recovered in the form of metal.
회화된 재 표면에는 백금(Pt), 루테늄(Ru) 등의 백금족 금속이 혼합되어 있는데 이를 백금을 선택적으로 용해하는 용해제를 사용하여 용해하면 백금은 용해액 내의 이온형태로 용해되지 않은 루테늄은 금속형태로 분리하여 회수할 수 있다. 상기 용해액으로는 상기 백금족 금속의 종류에 따라 염산, 질산, 황산 및 시안(CN) 중 하나 이상을 포함할 수 있다.Platinum group metals such as platinum (Pt) and ruthenium (Ru) are mixed on the ashed ash surface, and when dissolved using a solvent that selectively dissolves platinum, platinum is in the form of ions in the solution. Can be separated and recovered. The solution may include one or more of hydrochloric acid, nitric acid, sulfuric acid, and cyanide (CN) depending on the type of the platinum group metal.
표 2는 이온교환수지를 이용한 침출액 내 백금족 금속의 제거효율 및 회화 후 백금족 금속의 회수효율을 나타내고 있다. 이온교환수지는 강염기성 음이온교환수지로 Amberjet-4400(Cl)를 사용하였다.Table 2 shows the removal efficiency of the platinum group metal in the leachate using the ion exchange resin and the recovery efficiency of the platinum group metal after incineration. The ion exchange resin used Amberjet-4400 (Cl) as a strong basic anion exchange resin.
상기 표 2에서 흡착량은 흡착소재에 의해 백금족 금속이 흡착된 양을 나타낸다. 또한 제거효율은 백금족 금속 침출액으로부터 백금족 금속을 제거한 효율이다. 또한 회수효율은 백금족 금속이 흡착제에 흡착 후 회화하여 백금족 금속을 회수한 효율이다. 이러한 흡착량, 제거효율 및 회수효율은 다음의 수학식 1을 통해 계산될 수 있다. In Table 2, the adsorption amount indicates the amount of platinum group metal adsorbed by the adsorption material. Further, the removal efficiency is the efficiency of removing the platinum group metal from the platinum group metal leach solution. In addition, the recovery efficiency is the efficiency in which the platinum group metal is recovered by adsorption after adsorption on the adsorbent. This amount of adsorption, removal efficiency and recovery efficiency can be calculated through the following equation (1).
표 2를 살펴보면 이온교환수지를 더 많은 양 사용하면 침출액에 존재하는 백금족 금속이온을 100% 제거할 수 있으나 이온교환수지에 흡착되어 있는 백금족 금속이온이 줄어들어 회수 효율이 떨어지게 된다.Looking at Table 2, a larger amount of ion exchange resin can remove 100% of the platinum group metal ions present in the leachate, but the recovery efficiency decreases due to the reduction of platinum group metal ions adsorbed on the ion exchange resin.
표 3 및 도 3 ~ 도 6은 본 발명에 따른 각 단계에서의 SEM 사진 및 EDX 분석한 결과를 나타낸 것이다.Table 3 and Figures 3 to 6 show the results of SEM and EDX analysis at each step according to the present invention.
스택
stack
스택 침출 후
After stack leaching
침출액 이온교환수지 흡착
Leachate Ion Exchange Resin Adsorption
이온교환수지 회화
Ion Exchange Resin Painting
백금족 금속(백금, 루테늄)이 포함되어 있는 연료전지 폐 스택의 EDX 분석 결과 백금과 루테늄이 95:5 wt.%로 존재하는데, 스택을 침출 후 백금과 루테늄의 함량이 매우 줄어들었음을 알 수 있으며(EDX의 intensity를 보면 거의 분석이 안되는 수준임), 스택 침출 후 침출제로 사용한 chloride 이온이 분석됨을 알 수 있다.EDX analysis of a fuel cell waste stack containing platinum group metals (platinum, ruthenium) shows that platinum and ruthenium are present at 95: 5 wt.%. (The intensity of EDX is hardly analyzed), and the chloride ion used as the leaching agent after stack leaching is analyzed.
스택 침출액 백금족 금속이온을 이온교환수지에 흡착 후 EDX 분석 결과 침출하지 않은 연료전지 스택과 비교하여 매우 강한 강도(intensity)로 백금과 루테늄이 존재하는 것이 나타나고 있다.Stack leaching solution After adsorbing platinum group metal ions to ion exchange resin, EDX analysis shows that platinum and ruthenium are present in a very strong intensity compared to the fuel cell stack that is not leached.
백금족 금속이온을 흡착한 이온교환수지를 회화 후 분석한 EDX의 경우 침출액에서 이온교환수지 흡착한 과와 비교하여 매우 높은 백금, 루테늄 함량을 나타내고 있다.EDX, which was analyzed after incineration of ion exchange resins containing platinum group metal ions, showed very high platinum and ruthenium contents compared to those adsorbed on leachate.
도 7 및 도 8은 본 발명의 일실시예에 따른 XPS 분석 결과를 나타낸 그래프이다.7 and 8 are graphs showing the results of XPS analysis according to an embodiment of the present invention.
침출액 내 백금족 금속이온을 흡착한 이온교환수지 표면에 존재하는 백금은 이온형태로 존재하며, 흡착 후 회화한 이온교환수지 재(Ash) 표면에는 백금족 금속(Metallic Pt와 Ru Ox)이 확실하게 분석되고 이온형태의 백금은 존재하지 않는 것을 나타내고 있다.Platinum on the surface of the ion exchange resin adsorbed platinum group metal ions in the leachate is present in the form of ions, and platinum group metals (metallic Pt and Ru O x ) are reliably analyzed on the surface of the ash exchanged after adsorption. This indicates that ionic platinum does not exist.
또한, 회화 후 백금을 용해한 재의 경우 금속형태의 백금이 완전히 용해되어 없어지고 루테늄은 Ru Ox로 용해되지 않은 것으로 나타나고 있어, 백금족 금속혼합 재로부터 백금과 루테늄을 분리하여 회수할 수 있음을 알 수 있다. 즉, 백금은 이온형태로 루테늄은 금속형태로 분리하여 회수할 수 있다.
In addition, in the case of ash which dissolved platinum after incineration, the metal form of platinum was completely dissolved and ruthenium did not appear to be dissolved by Ru O x , indicating that platinum and ruthenium can be separated and recovered from the platinum group metal mixture. have. That is, platinum can be recovered by separating ions in the form of ions and ruthenium in the form of metals.
이상과 같이 도면과 명세서에서 최적 실시 예가 개시되었다. 여기서 특정한 용어들이 사용되었으나, 이는 단지 본 발명을 설명하기 위한 목적에서 사용된 것이지 의미 한정이나 특허청구범위에 기재된 본 발명의 범위를 제한하기 위하여 사용된 것은 아니다. 그러므로 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시 예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의해 정해져야 할 것이다.As described above, an optimal embodiment has been disclosed in the drawings and the specification. Although specific terms have been employed herein, they are used for purposes of illustration only and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
Claims (3)
(b) 수용액에서 양전하를 띄는 염기성 음이온교환수지를 사용하여 상기 침출액에서 음전하를 띄고 있는 백금족 금속 이온을 정전기적 인력에 의해 음이온 교환수지에 흡착하는 단계
(c) 상기 흡착제를 회화(灰化, ashing)하여 상기 백금족 금속이온을 금속형태로 회수하는 단계
를 포함하며,
상기 (c) 단계 후에,
재(ash)를 염산, 질산, 황산 및 시안 중 적어도 하나 이상을 포함하는 용해제를 사용하여 용해하여 용해되는 백금은 용액 내 이온형태로 회수하고 용해되지 않는 루테늄은 금속형태로 각각 분리하여 회수하는 단계
를 더 포함하는 폐기물로부터 백금족 금속을 회수하는 방법.
(a) pulverizing and screening a waste containing platinum group metal, dissolving and leaching it in a solution containing oxidizing agent and hydrochloric acid containing at least one of nitric acid, hydrogen peroxide, chlorine gas, hypochlorous acid, and sodium hypochlorite to form an anionic platinum group metal complex. Steps to Make Contained Leachate
(b) adsorbing platinum group metal ions having a negative charge in the leachate to the anion exchange resin by electrostatic attraction using a basic anion exchange resin having a positive charge in an aqueous solution;
(c) recovering the platinum group metal ions in the form of a metal by sintering the adsorbent.
Including;
After the step (c)
The ash is dissolved by dissolving ash using a solubilizer including at least one of hydrochloric acid, nitric acid, sulfuric acid and cyan.
Method for recovering the platinum group metal from the waste further comprising.
상기 (b) 단계 후에,
흡착제에 붙어 있는 백금족 금속이온을 탈착제로 탈착하여 고농도 백금족 금속이온 혼합용액으로 회수하는 단계
를 더 포함하는 백금족 금속 함유 산업폐기물로부터 백금족 금속을 회수하는 방법.The method of claim 1,
After step (b),
Desorption of the platinum group metal ion attached to the adsorbent with a desorbent to recover the high concentration platinum group metal ion mixed solution
Method of recovering the platinum group metal from the platinum group metal-containing industrial waste further comprising.
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| CN108579695A (en) * | 2018-01-22 | 2018-09-28 | 江苏欣诺科催化剂有限公司 | A kind of adsorbent and desorption method of absorption iridium |
| CN112029998B (en) * | 2020-08-27 | 2022-03-18 | 湖南高鑫铂业有限公司 | Method for recovering platinum group metal from granular waste catalyst by combination of dissolution, absorption and desorption |
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| KR20030036749A (en) * | 2000-09-05 | 2003-05-09 | 존슨 맛쎄이 퍼블릭 리미티드 컴파니 | Recovery of Metals by Incineration of Metal Containing Basic Ion Exchange Resin |
| KR20030041841A (en) * | 2001-11-21 | 2003-05-27 | 쉬플리 캄파니, 엘.엘.씨. | A method for recovering catalytic metals |
| JP2005002414A (en) * | 2003-06-12 | 2005-01-06 | Maezawa Ind Inc | Method of recovering noble metal in solution |
| KR20100113678A (en) * | 2009-04-14 | 2010-10-22 | 전북대학교산학협력단 | Recovery method of valuableness metals |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101392179B1 (en) | 2013-02-08 | 2014-05-08 | 강희남 | Recovery method of platinum group metal and apparatus for recovering platinum group metal |
| KR101454645B1 (en) | 2013-02-20 | 2014-10-27 | 한국생산기술연구원 | Method for quantitative analysis of metals from spent catalyst of exhaust gas consecration system |
| KR101579498B1 (en) * | 2015-02-24 | 2015-12-22 | (주) 유천테크 | Method for recovering palladium of waste pastes containing palladium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012121496A2 (en) | 2012-09-13 |
| WO2012121496A3 (en) | 2012-11-15 |
| CN103502484A (en) | 2014-01-08 |
| KR20120103082A (en) | 2012-09-19 |
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