Recovery of palladium from palladium phthalocyanine complex adsorbed on silica

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• 作者：Arvind B. Boricha ; Hari C. Bajaj ; Pushpito K. Ghosh ; Raksh V. Jasra
• 刊名：Hydrometallurgy
• 出版年：2007
• 期刊代码：38_0304386x
• 类别：ce
• 出版时间：July 2007
• 卷：87
• 期：3-4
• 页码：140-147
• 文件大小：527 K

摘要

This study presents the feasibility of recovering palladium from the spent silica waste wherein palladium is adsorbed on silica as palladium phthalocyanine complexes. The spent silica having palladium phthalocyanine complexes adsorbed on it is thermally calcined in air to partially burn the organic moiety of the complex followed by palladium dissolution as H₂PdCl₄ in hydrochloric acid. The palladium is recovered as PdCl₂ by judiciously adjusting the pH of filtrate obtained. Recovered silica retains its structure and can be re-used.