Effective Dissolution of Platinum by Using Chloride Salts in Recovery Process

Horike, Chiyoko; Morita, Kazuki; Okabe, Toru H.

doi:10.1007/s11663-012-9746-z

Cited by 40 publications

(17 citation statements)

References 16 publications

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“…A recovery of up to 95.9% of Pt was achieved. Horike et al [34] created an efficient and environmentally friendly chlorination process for the recovery of Pt using copper (II) chloride (CuCl 2 ) as a chorine source for the chlorination of Pt at 400 • C to 600 • C. Owing to its high chemical stability, pure Pt is insoluble in HCl (aq), therefore, to improve solubility, the scrap containing Pt was then alloyed with Mg, physically mixed with CuCl 2 at 500 • C and then dissolved in HCl (aq). Murray et al [35] presented a method for the recovery of Pt and Pd from spent catalysts in which VCCs were roasted at 600-1200 • C in a chlorine gas fluid field.…”

Section: Pyrometallurgical Recovery Processmentioning

confidence: 99%

Platinum Recovery Techniques for a Circular Economy

et al. 2021

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Platinum and other metals are very scarce materials widely used in the energy and transportation sector among other sectors. Obtaining Platinum is becoming more difficult due to its scarcity on earth and because of the high amount of energy and water used for its extraction. In this regard, the recycling of platinum is necessary for sustainable technologies and for reaching a circular economy towards this expensive and rare metal. Conventional methods for platinum recycling make use of enormous amounts of energy for its recovery, which makes them not very attractive for industry implementation. Furthermore, these processes generate very toxic liquid streams and gas wastes that must be further treated, which do not meet the green environmental point of view of platinum recycling. Consequently, new advanced technologies are arising aiming to reach very high platinum recovery rates while being environmentally friendly and making a huge reduction of energy use compared with the conventional methods. In this review, conventional platinum recovery methods are summarized showing their limitations. Furthermore, new and promising approaches for platinum recovery are reviewed to shed light on about new and greener ways for a platinum circular economy.

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Section: Pyrometallurgical Recovery Processmentioning

confidence: 99%

Platinum Recovery Techniques for a Circular Economy

et al. 2021

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“…Complex oxide or chloride of PGMs (or mixture of oxides or chlorides) Fig. 6 Schematic illustration of the novel process for treating PGMs in scraps (e.g., spent automobile catalysts) to produce more soluble species [43][44][45][46][47][48][49][50] . The solubilization process is based on alloying treatment with the vapor of active metals.…”

Section: Ceramic Substratementioning

confidence: 99%

“…報告している48) ．Fig. 9 に示すように，マグネシウム-白金合金に塩化剤として CuCl 2 を混合して 500 ℃ で 3 h 反応させた場合，処理後のマグネシウム-白金化合物は 80 ℃ の濃塩酸中に 0.25 h で完全に溶解した48,49) ．なお，合金化処理を施して…”

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Trends of Technological Development of Platinum Group Metal Recycling: Solubilization and Physical Concentration Processes

Taninouchi

Okabe

2021

J. Japan Inst. Metals

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Spent automobile catalysts are the most important secondary resource for platinum group metals (PGMs), and their recycling is essential not only to ensure a steady supply of PGMs but also to preserve the natural environment. However, several factors limit the efficiency of PGM recovery in current recycling processes. Specifically, PGMs represent a small proportion of the entire catalyst and are difficult to dissolve in aqueous solutions for subsequent separation. In recent decades, multiple technologies have been developed to make the recycling of PGMs more efficient and environment-friendly. Herein, we introduce the typical industrial processes for recovering PGMs from spent catalysts as well as established and emerging trends in the technological development of PGM recycling. Furthermore, we review novel recycling techniques for converting PGMs in spent catalysts into more soluble states and/or physically concentrating PGMs from spent catalysts.

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“…Horike et al [65] proposed a chlorination process for an efficient Pt recovery. CuCl2 was used as a chlorine solution for the chlorination of Pt at 400 to 600 °C.…”

Section: Chlorination Processmentioning

confidence: 99%

Recovery of Noble Metals from Spent Catalysts: A Review

Padamata

Yasinskiy

Polyakov

et al. 2020

Metall Mater Trans B

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During several past decades, plenty of technologies for platinum group metals (PGM) and rhenium (Re) recovery from electronic wastes and spent catalysts have been developed and published. The reasons for the rising interest in this area are: □ The abundance of these elements in the earth's crust is less than 10 -3 ppm (~6.6 10 4 t all over the world); □ global demand for PGMs is over 590 t; □ electronics and catalysts industry consumes over 90% of precious metals (about 65% of Pd, 45% of Pt and 84% of Rh are consumed in catalytic converters); □ properties of PGMs and Re (resistance towards corrosion and oxidation, high melting temperatures, electrical conductivity, and catalytic activity) are of great commercial interest.Even though several comprehensive reviews on the recovery of precious metals from spent catalysts have been recently published, several developments were out of the attention of the scientific community. The reviews divide the technologies into hydro-and pyrometallurgical ones. However, the variety of different approaches requires a more detailed classification. This article is an overview of the recently reported works and the comparison of different technologies in terms of extraction efficiency, environmental friendliness, and capital and operational expenditures. The new electrochemical method, which is now under development, is also presented.

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Effective Dissolution of Platinum by Using Chloride Salts in Recovery Process

Cited by 40 publications

References 16 publications

Platinum Recovery Techniques for a Circular Economy

Platinum Recovery Techniques for a Circular Economy

Trends of Technological Development of Platinum Group Metal Recycling: Solubilization and Physical Concentration Processes

Recovery of Noble Metals from Spent Catalysts: A Review

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