JP2019072722A - 貴金属吸着剤の製造方法および貴金属の回収方法 - Google Patents
貴金属吸着剤の製造方法および貴金属の回収方法 Download PDFInfo
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- 239000003463 adsorbent Substances 0.000 title claims abstract description 35
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- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 42
- JPFCOVZKLAXXOE-XBNSMERZSA-N (3r)-2-(3,5-dihydroxy-4-methoxyphenyl)-8-[(2r,3r,4r)-3,5,7-trihydroxy-2-(4-hydroxyphenyl)-3,4-dihydro-2h-chromen-4-yl]-3,4-dihydro-2h-chromene-3,5,7-triol Chemical compound C1=C(O)C(OC)=C(O)C=C1C1[C@H](O)CC(C(O)=CC(O)=C2[C@H]3C4=C(O)C=C(O)C=C4O[C@@H]([C@@H]3O)C=3C=CC(O)=CC=3)=C2O1 JPFCOVZKLAXXOE-XBNSMERZSA-N 0.000 claims abstract description 15
- 229920001991 Proanthocyanidin Polymers 0.000 claims abstract description 15
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 9
- 238000004132 cross linking Methods 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims description 25
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 21
- 239000010931 gold Substances 0.000 claims description 20
- 229910052737 gold Inorganic materials 0.000 claims description 13
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 9
- 229910052763 palladium Inorganic materials 0.000 claims description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 5
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 239000010970 precious metal Substances 0.000 description 16
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 5
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- 235000014787 Vitis vinifera Nutrition 0.000 description 3
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- PFTAWBLQPZVEMU-ZFWWWQNUSA-N (+)-epicatechin Natural products C1([C@@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-ZFWWWQNUSA-N 0.000 description 2
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- ADRVNXBAWSRFAJ-UHFFFAOYSA-N catechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3ccc(O)c(O)c3 ADRVNXBAWSRFAJ-UHFFFAOYSA-N 0.000 description 2
- 235000005487 catechin Nutrition 0.000 description 2
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- LPTRNLNOHUVQMS-UHFFFAOYSA-N epicatechin Natural products Cc1cc(O)cc2OC(C(O)Cc12)c1ccc(O)c(O)c1 LPTRNLNOHUVQMS-UHFFFAOYSA-N 0.000 description 2
- 235000012734 epicatechin Nutrition 0.000 description 2
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 2
- LVJJFMLUMNSUFN-UHFFFAOYSA-N gallocatechin gallate Natural products C1=C(O)C=C2OC(C=3C=C(O)C(O)=CC=3)C(O)CC2=C1OC(=O)C1=CC(O)=C(O)C(O)=C1 LVJJFMLUMNSUFN-UHFFFAOYSA-N 0.000 description 2
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- 229920001864 tannin Polymers 0.000 description 2
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- WMBWREPUVVBILR-GHTZIAJQSA-N (+)-gallocatechin gallate Chemical compound O([C@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=C(O)C=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-GHTZIAJQSA-N 0.000 description 1
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- XMOCLSLCDHWDHP-IUODEOHRSA-N epi-Gallocatechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@H]2O)=CC(O)=C(O)C(O)=C1 XMOCLSLCDHWDHP-IUODEOHRSA-N 0.000 description 1
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Classifications
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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
- 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
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
【解決手段】本発明によれば、貴金属吸着剤を製造する方法であって、平均重合度が3〜4のプロアントシアニジンオリゴマーに対して等モルのグルタルアルデヒドを架橋剤として加えて架橋してなる不溶性ゲルを貴金属吸着剤として得る方法が提供される。また、本発明によれば、複数の貴金属が混在する溶液から白金(Pt)以外の他の貴金属を選択的に回収する方法であって、平均重合度が3〜4のプロアントシアニジンオリゴマーに対して等モルのグルタルアルデヒドを架橋剤として加えて架橋してなる不溶性ゲルを貴金属吸着剤として使用して、前記溶液の中に混在する白金(Pt)以外の前記他の貴金属を該貴金属吸着剤に選択的に吸着させることを特徴とする、貴金属の回収方法が提供される。
【選択図】図1
Description
不溶性ゲルは、架橋密度が高くなるほど水による膨潤が起こりにくくなり含水率が小さくなることが知られている。そこで、作製したサンプル1〜3について含水率を求めることにより架橋密度を検証した。具体的には、各サンプル(直径10 mm、厚さ1 mm)をイオン交換水に24時間浸漬した後に質量を計測し、同サンプルを70℃で恒量まで乾燥させた後に再度質量を計測し、各計測値を下記式に投入して含水率を求めた。なお、下記式において、Wwはイオン交換水浸漬後のサンプルの質量を示し、Wdは乾燥後のサンプルの質量を示す。
含水率(%)=(Ww - Wd) / Ww × 100
金(Au)、銀(Ag)、白金(Pt)およびパラジウム(Pd)の標準液(1000 ppm、和光純薬製)をそれぞれ0.25 mLずつ混合して全量1 mLの貴金属イオン水溶液を調製した。次に、乾燥したサンプル2(0.1 g)を調製した貴金属イオン水溶液に入れて、室温で24時間静置した。その後、誘導結合プラズマ(ICP)発光分析法により貴金属イオン水溶液中の貴金属イオン濃度を測定し、下記式により各貴金属の吸着率(%)を算出した。なお、下記式において、C0はサンプル2を投入する前の溶液における各貴金属イオン濃度を示し、Csは24時間後の溶液における各貴金属イオン濃度を示す。
吸着率(%)=(C0 - Cs) /C0 × 100
乾燥したサンプル1〜3(0.1 g)をそれぞれ別個の金イオン水溶液(1000 ppm標準液、和光純薬製)10mLに入れた後、各金イオン溶液中の金イオン濃度をICPにより経時的に測定し、金の吸着率(%)の経時的変化を調べた。
Claims (2)
- 貴金属吸着剤を製造する方法であって、
下記構造式で表される平均重合度が3〜4のプロアントシアニジンオリゴマーに対して等モルのグルタルアルデヒドを架橋剤として加えて架橋してなる不溶性ゲルを貴金属吸着剤として得る方法。
- 金(Au)、銀(Ag)およびパラジウム(Pd)からなる群から選択される少なくとも一種の貴金属と、白金(Pt)とが混在する溶液から白金(Pt)以外の他の貴金属を選択的に回収する方法であって、
下記構造式で表される平均重合度が3〜4のプロアントシアニジンオリゴマーに対して等モルのグルタルアルデヒドを架橋剤として加えて架橋してなる不溶性ゲルを貴金属吸着剤として使用して、前記溶液の中に混在する白金(Pt)以外の前記他の貴金属を該貴金属吸着剤に選択的に吸着させることを特徴とする、貴金属の回収方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112899492A (zh) * | 2021-01-15 | 2021-06-04 | 浙江大学 | 一种利用超分子吸附剂吸附分离钯的方法 |
DE112020001766T5 (de) | 2019-04-05 | 2022-01-13 | Koa Corporation | Widerstandsmaterial, Widerstand und Herstellungsverfahren für ein Widerstandsmaterial |
CN114672647A (zh) * | 2022-03-28 | 2022-06-28 | 北京科技大学 | 一种利用葡萄皮控温选择性依次提取钯、铂的方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE112020001766T5 (de) | 2019-04-05 | 2022-01-13 | Koa Corporation | Widerstandsmaterial, Widerstand und Herstellungsverfahren für ein Widerstandsmaterial |
CN112899492A (zh) * | 2021-01-15 | 2021-06-04 | 浙江大学 | 一种利用超分子吸附剂吸附分离钯的方法 |
CN114672647A (zh) * | 2022-03-28 | 2022-06-28 | 北京科技大学 | 一种利用葡萄皮控温选择性依次提取钯、铂的方法 |
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