| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
23권 2호 |
| 발표분야 |
포스터_환경·에너지 |
| 제목 |
Palladium Chloride Species Recovery from Pd/SiO2 Catalysts by Hydrometallurgy |
| 초록 |
In heterogeneous reaction, palladium (Pd) catalysts have been utilized for various industrial technologies. It has been gaining attention of recovery from the spent materials due to its high economic value. Herein, we investigated selective dissolution of Pd and recovery of Pd as PdCl2 species from Pd/SiO2 catalyst to recycle for a precursor. The total process is composed of leaching process in HCl and H2O2 aqueous mixture and recovery process with addition of 0.5 M NaOH solution. We found that complete dissolution was achieved by leaching with 3 M HCl and 5 vol% H2O2 at 80 ℃ for 2 h with a liquid/solid ratio of 50/1. Palladium components such as Cl2 and HClO. The components reacted with Pd to form H2PdCl4. Pd could be recovered as components combining with chlorine by adjusting the pH to 9 of the filtrate without a reducing agent. These results suggested that recovered Pd powder could be utilized as a Pd precursor. |
| 저자 |
김예은1, 변미연1, 백재호1, 이관영2, 이만식1
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| 소속 |
1한국생산기술(연), 2고려대 |
| 키워드 |
Hydrometallurgy; Palladium recovery; Pd/SiO2 catalyst
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| E-Mail |
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