JP2024013693A - 貴金属の回収方法 - Google Patents
貴金属の回収方法 Download PDFInfo
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- JP2024013693A JP2024013693A JP2022115999A JP2022115999A JP2024013693A JP 2024013693 A JP2024013693 A JP 2024013693A JP 2022115999 A JP2022115999 A JP 2022115999A JP 2022115999 A JP2022115999 A JP 2022115999A JP 2024013693 A JP2024013693 A JP 2024013693A
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- 229910052741 iridium Inorganic materials 0.000 claims abstract description 18
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 18
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- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 12
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- 229910052782 aluminium Inorganic materials 0.000 claims description 7
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- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
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- 229910002969 CaMnO3 Inorganic materials 0.000 abstract description 4
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- 238000012545 processing Methods 0.000 description 16
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- 239000002243 precursor Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- 239000010948 rhodium Substances 0.000 description 11
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
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- 229910052748 manganese Inorganic materials 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
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- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- 238000000638 solvent extraction Methods 0.000 description 1
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- 238000005477 sputtering target Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
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
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- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
本発明に係る貴金属の回収方法の処理対象となる被処理材は、Pt、Pd、Ru、Ir、Rhの少なくともいずれかの貴金属を被回収成分として含むものであれば特に制限はない。廃棄された各種電子・電気機器の回路基板、使用済み触媒、使用済みスパッタリングターゲット材、自動車等から排出されるシュレッダーダスト等、いわゆる廃棄物であって上記被回収成分を含むものを被処理材とすることができる。
回収剤は、ペロブスカイト型酸化物であるCaMnO3を主成分として含む。CaMnO3は、被処理材から生成する貴金属酸化物の蒸気と接触することで貴金属原子を吸蔵する。CaMnO3のようなペロブスカイト型酸化物の合成方法としては、固体前駆物質(Ca化合物とMn化合物)の加熱による固相反応法や、前駆物質の水溶液による共沈法等が知られている。本発明では、前者の固相反応法によるCaMnO3の適用が好ましい。
以上説明した回収剤が共存する状態で、被処理材を酸化性雰囲気中で加熱すると回収剤が貴金属を吸蔵する。具体的操作として、回収剤及び被処理材を反応容器内に配置して適宜の加熱手段により加熱処理する。反応容器については、ガラス、セラミックス等の耐熱材料からなる管状、箱状等の各種形状の容器や、工業的回収を考慮した耐熱金属からなる塔槽類等があり特に制限されない。
本発明に係る貴金属回収方法では、被処理材中の貴金属、金属を酸化して酸化物を形成するため、反応系を酸化性雰囲気とする。酸化性雰囲気としては、酸素を5体積%以上90体積%以下含む雰囲気が好ましく、10体積%以上80体積%以下含む雰囲気がより好ましい。工業的な貴金属回収のため、大気雰囲気中で処理することができる。
以上説明した本発明の貴金属の回収方法により、回収剤であるCaMnO3は、被回収成分を吸蔵した複合酸化物となる。本発明では、この回収工程後の回収剤について吸蔵材と称する。この被回収成分を含む吸蔵材は、酸に可溶であるので、吸蔵材を酸に接触させる酸処理を行うことで被回収成分を吸蔵材から分離することができる。
Claims (6)
- Pt、Pd、Ru、Ir、Rhの少なくともいずれかの貴金属を被回収成分として含む被処理材と、CaMnO3ペロブスカイト型酸化物を含む回収剤とを酸化性雰囲気中で接触状態又は非接触状態で加熱処理することで、前記被回収成分を前記回収剤へ吸蔵させて吸蔵材を形成する回収工程を含む貴金属の回収方法において、
前記加熱処理の温度を1000℃以上とすることを特徴とする貴金属の回収方法。 - 加熱処理雰囲気中の回収剤の質量MPと被処理材の質量MTとの比MP/MTを1.0以上8.0以下とする請求項1記載の貴金属の回収方法。
- 被処理材は、Co、Cr、Ti、Fe、Sn、Pb、Zn、Cu、Ni、Zr、Si、Alの少なくともいずれかを含む請求項1又は請求項2記載の貴金属の回収方法。
- 被処理材は、Cr、Ti、Sn、Zr、Si、Alの少なくともいずれかを含む請求項1又は請求項2記載の貴金属の回収方法。
- CaMnO3ペロブスカイト型酸化物を含む回収剤は、CaCO3とMnO2とを混合及び焼成して形成されるものである請求項1又は請求項2記載の貴金属の回収方法。
- 吸蔵材を酸に溶解することで、被回収成分を前記酸に吸収させる酸処理工程を含む請求項1又は請求項2記載の貴金属の回収方法。
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Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5339302B2 (ja) | 2008-02-27 | 2013-11-13 | 独立行政法人産業技術総合研究所 | 金属の回収方法 |
JP6966768B2 (ja) | 2017-08-04 | 2021-11-17 | 国立研究開発法人産業技術総合研究所 | 貴金属等の回収方法 |
JP7228892B2 (ja) | 2018-06-19 | 2023-02-27 | 国立研究開発法人産業技術総合研究所 | 被回収成分を回収する方法、ペロブスカイト型の複合酸化物、および処理体を連続的に製造する装置 |
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