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PLATINUM-GROUP METAL RECOVERY METHOD, COMPOSITION CONTAINING PLATINUM-GROUP METALS, AND CERAMIC MATERIAL NEW

外国特許コード F210010570
整理番号 (FU909)
掲載日 2021年11月1日
出願国 世界知的所有権機関(WIPO)
国際出願番号 2021JP003146
国際公開番号 WO 2021153710
国際出願日 令和3年1月29日(2021.1.29)
国際公開日 令和3年8月5日(2021.8.5)
優先権データ
  • 特願2020-013995 (2020.1.30) JP
発明の名称 (英語) PLATINUM-GROUP METAL RECOVERY METHOD, COMPOSITION CONTAINING PLATINUM-GROUP METALS, AND CERAMIC MATERIAL NEW
発明の概要(英語) Provided is a platinum-group metal recovery method for efficiently recovering platinum-group metals. The platinum-group metal recovery method comprises an immobilization step for bringing a raw material melt containing platinum-group metals, an alkali metal carbonate or hydroxide melt, an oxide melt, and a ceramic material into contact with each other to immobilize the platinum-group metals on the ceramic material.
従来技術、競合技術の概要(英語) BACKGROUND ART
Platinum group metals have excellent catalytic performance, and therefore are used in various applications such as automobile exhaust gas purification catalysts and fuel automobile catalysts. In this way, platinum group metals are industrially essential elements, but due to their scarcity, the produced amount of platinum group metals is much lower than that of base metals. For example, the produced amounts of Pt and Pd, which are produced relatively large among platinum group metals, are approximately 200 tons. Furthermore, primary sources of platinum group metals are limited to south Africa, Russia, and the like. Therefore, when demand for platinum group metals increases due to the development of new materials using platinum group metals, insufficient supply of platinum group metals occurs. That is, it can be said that there is a high risk of supplying platinum group metals at present.
In order to address such supply risk due to uneven distribution of resources, it is extremely important to extract and recover platinum group metals from waste products such as waste catalysts generated in Japan. In addition, mining and smelting of natural ores involves a large environmental burden. Therefore, if the platinum group metal can be efficiently extracted from waste products having a higher platinum group metal concentration than natural ores, it also leads to a reduction in environmental impact. However, since platinum group metals are chemically stable, conventional dry methods require separating and concentrating the platinum group metal from waste products and dissolving the concentrate with a high concentration of acid. Therefore, the energy consumption for extracting the platinum group metal is large, and the chemical cost and waste liquid treatment cost are also high. Therefore, there is a need to develop a more efficient method for recovering platinum group metals. For example, Patent Document 1~ 4 and Non-Patent Document 1 disclose a conventional technique related to a method for recovering a platinum group metal.
  • 出願人(英語)
  • ※2012年7月以前掲載分については米国以外のすべての指定国
  • UNIVERSITY OF FUKUI
  • 発明者(英語)
  • OKADA, Takashi
  • TANIGUCHI, Yoshiya
  • NISHI, Yuto
国際特許分類(IPC)
指定国 National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS IT JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN WS ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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