Abstract
A novel approach for recovering yttrium from high ferric and strong acidic sulphate leach solutions of deep-sea mud by stepwise extraction and stripping has been developed. The results show that the first step extraction by N235+TBP system can extract H2SO4 well and adjust the raffinates to a desirable pH, while only the iron was selectively co-extracted with negligible loss of yttrium ions. The organic solution can be easily regenerated by using a 50 g/L H2SO4 solution to strip extracted iron followed by using deionized water to strip H2SO4. The raffinate could be directly used for the second step of yttrium extraction by P204+TBP system, while iron was co-extracted. The co-extracted yttrium and iron could be separated well through a sequentially stepwise stripping process using a 50 g/L H2SO4 solution and a 0.6 mol/L H2C2O4 solution. Over the whole process, yttrium was separated well from the sulphate leach solutions and enriched into the strip liquor of yttrium sulfate. The organic extractants could be returned for recycling.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Solvent Extraction Research and Development, Japan
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
