From trace to pure: Recovery of scandium from the waste acid of titanium pigment production by solvent extraction
Process Safety and Environmental Protection(2019)
摘要
•Trace scandium was efficiently pre-enriched by solvent extraction using D2EHPA.•Separation factor βSc/Ti was improved by adding H2O2 into aqueous phase prior to extraction.•A process to prepare scandium of purity 99.9% form waste acid was introduced.
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关键词
Scandium,Titanium white waste acid,Solvent extraction,D2EHPA,[TiO(H2O2)]2+
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