期刊
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
卷 35, 期 7, 页码 2109-2113出版社
KOREAN CHEMICAL SOC
DOI: 10.5012/bkcs.2014.35.7.2109
关键词
Iron; Mixture of D2EHPA and TBP; Reductive stripping; Sulfurous acid; Sodium sulfite
资金
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2011-0023778]
- National Research Foundation of Korea [2011-0023778] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Solvent extraction of Fe(III) from chloride solution by using a mixture of D2EHPA (Di-(2-ethylhexyl)phosphoric acid) and TBP (Tri-butyl phosphate) and the reductive stripping of Fe(III) from the loaded organic were investigated. Quantitative extraction of Fe(III) from the solution (Fe concentration = 90 g/L) was accomplished in two cross-current extraction stages by using the mixture of D2EHPA and TBP. In order to facilitate the stripping efficiency, a reductive stripping method was employed by using H2SO3 or Na2SO3 as a reducing agent. The addition of H2SO4 into reducing agents led to improvement in the stripping efficiency while high concentration acid would suppress it. Both of the mixtures of H2SO4+H2SO3 and H2SO4+Na2SO3 showed good efficiency for the stripping of Fe(III), while the latter was recommended as the stripping solution based on the economics and experimental condition.
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