Banda, Raju Lee, Hwa Young Lee, Man Seung 2024-01-20T13:02:38Z 2024-01-20T13:02:38Z 2021-09-01 2013-02 0236-5731 https://pubs.kist.re.kr/handle/201004/128402 In order to separate Zr(IV) and Hf(IV) from chloride solutions, TEHA (tri 2-ethyl hexyl amine) was used as an extractant. The aqueous phase consisted of 200 ppm of Zr and Hf in strong HCl solution. In our solvent extraction system, the extractability of the constituents by TEHA was found to be in the following order, HCl > Zr(IV) > Hf(IV). The highest separation factor between the two metals was obtained from 8 M HCl solution. Based on the selectivity towards Zr over Hf with TEHA, McCabe-Thiele plot was constructed and batch simulation of counter-current extraction studies has been conducted. Scrubbing results from the loaded TEHA showed that Hf was selectively scrubbed over Zr by strong HCl solution (9 M). Complete stripping of Zr was possible from the organic phase with distilled water after scrubbing of Hf. The extraction behavior of Zr and Hf by TEHA was compared with that by TiOA and TOA. Our results can be utilized in developing a solvent extraction process to separate Zr and Hf from concentrated chloride solutions by using TEHA. English SPRINGER GEOLOGICAL-MATERIALS HAFNIUM SEPARATION ION-EXCHANGERS ZIRCONIUM CHROMATOGRAPHY MEDIA ALIQUAT-336 MIXTURES CHLORIDE AMINES Separation of Zr and Hf from strong hydrochloric acid solution by solvent extraction with TEHA Article 10.1007/s10967-012-1941-5 1 JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY, v.295, no.2, pp.1537 - 1543 JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY 295 2 1537 1543 scie scopus 000313713300101 2-s2.0-84876249395 Chemistry, Analytical Chemistry, Inorganic & Nuclear Nuclear Science & Technology Chemistry Nuclear Science & Technology Article GEOLOGICAL-MATERIALS HAFNIUM SEPARATION ION-EXCHANGERS ZIRCONIUM CHROMATOGRAPHY MEDIA ALIQUAT-336 MIXTURES CHLORIDE AMINES Zirconium Hafnium Chloride solutions Solvent extraction TEHA