Towards efficient extraction of La(III) from spent FCC catalysts by alkaline pre-treatment
作者： Nguyen Le-Phuc , Yen Thi Hai Pham , Phuc Nguyen Vinh Bui , Thuy Ngoc Luong , Phuong Nguyen Xuan Vo
DOI: 10.1016/J.MINENG.2018.07.020
关键词:
摘要: Abstract In Vietnam, Dzung Quat Refinery disposes about 7300 tonnes of spent fluid catalytic cracking (SFCC) catalysts per year. The recovery rare earth metals (La(III), Ce(III),…) contained in SFCC using acid leaching process has attracted much attention scientific community. this study, the effect alkaline pre-treatment prior to on yield La(III) was investigated. results showed that caused zeolite destruction, which had a positive La(III). High yields La(III), 80% and 86%, were achieved when pre-treated with NaOH NH3, respectively, before 2 M HNO3 solution at 50 °C. These comparable one obtained from sample leached by 7 M 50 °C without initial pre-treatment. NH3 significantly enhanced destruction increased compared It is likely due interactions contaminant (e.g. Ni, V, Fe), deposited during process.
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