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氯化铝中萃取铁工艺 被引量:1

Extraction of Fe( Ⅲ) from Aluminum Chloride
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摘要 采用萃取剂N,N,N',N'-四丁基丙二酰胺(TBMA)、N,N,N',N'-四辛基-3-氧戊二酰胺(TODGA)和甲基异丁基甲酮(MIBK)从氯化铝水溶液中萃取铁,以制备高纯氯化铝。研究结果表明,当氯化铝溶液中盐酸浓度在4 mol/L左右时,TBMA和MIBK的萃取率在90%以上。TODGA显示出优异的萃取分离性能。当氯化铝溶液中Al^(3+)浓度为2.0 mol/L,Fe^(3+)浓度为0.0036 mol/L(0.2 g/L),HCl浓度为1.2 mol/L时,0.20 mol/L TODGA的环己烷或环己烷有机相对铁的一次萃取率达到99.9%以上,多次萃取后溶液中的铁含量低于0.01 mg/L,能深度去除氯化铝中的铁杂质,在工业化生产中有极大的应用价值。 The extraction behaviors of Fe ( Ⅲ ) in the preparation of high purity aluminum chloride with N, N, N', N'-tetrabutyl malonamide ( TBMA ), N, N, N', N'-tetraoctyl-3-oxy-glutaramide ( TODGA ) and methyl isobutyl ketone(MIBK) have been investigated. The results show that the extraction efficiency of Fe( 111 ) with TBMA or MIBK is 90% when the concentration of hydrochloric acid in the aluminum chloride solution is 4 mol/L. TODGA shows an excellent separation performance. When the concentrations of Al3+ , Fe3+ , and HCl are 2.0 mol/L, 0. 0036 mol/L(0. 2 g/L), and 1.2 mol/L, respectively, in the solution of aluminum chloride, the extraction efficiency of Fe3+ is more than 99.9% with 0. 20 mol/L TODGA in cyclohexane or n-dodecane. After several extractions, the iron impurities in the aluminum chloride can be deeply removed and the iron content in the solution is lower than 0. 01 mg/L, indicating that it has potential application in industrial production.
出处 《应用化学》 CAS CSCD 北大核心 2018年第1期75-81,共7页 Chinese Journal of Applied Chemistry
基金 国家自然科学基金(21077044)项目资助~~
关键词 高纯氯化铝 提纯 萃取 N N N' N'-四辛基-3-氧戊二酰胺 high purity aluminum chloride purification extraction Fe (Ⅲ) N, N, N', N'-tetraoctyl-3-oxy- glutaramide
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