Journal article
Separation and Recovery of Scandium from Sulfate Media by Solvent Extraction and Polymer Inclusion Membranes with Amic Acid Extractants
W Yoshida, F Kubota, Y Baba, SD Kolev, M Goto
ACS Omega | AMER CHEMICAL SOC | Published : 2019
Abstract
We report on the separation and recovery of scandium(III) from sulfate solutions using solvent extraction and a membrane transport system utilizing newly synthesized amic acid extractants. Scandium(III) was quantitatively extracted with 50 mmol dm-3 N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]glycine (D2EHAG) or N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]phenylalanine (D2EHAF) in n-dodecane at pH 2 and easily stripped using a 0.5 mol dm-3 sulfuric acid solution. The extraction mechanisms of scandium(III) extraction with D2EHAG and D2EHAF were examined, and it was established that scandium(III) formed a 1:3 complex with both extractants (HR), that is, Sc(SO4)2 - aq + 1.5(HR)2org ⇄ Sc(SO4)R(HR)..
View full abstractGrants
Awarded by Ministry of the Environment, Government of Japan
Funding Acknowledgements
The present work is supported by the Open Partnership Joint Project of the Japanese Society for the Promotion of Science [JSPS, grant no. AJ179065 (29-9111-t13)]. W.Y. was supported by Research Fellowships of JSPS for Young Scientists (grant no. 17J04900). This research was partly supported by The Environment Research and Technology Development Fund (ERTDF, grant no. 3-1710) from the Ministry of the Environment Japan, and a Grant-in Aid for Scientific Research (no. JP19K05126) from the Ministry of Education, Science, Sports, and Culture of Japan.