引用本文:
张凌云, 管航敏, 黎汉生, 江可. 萃取Fe3+和氨水-乙醇反萃沉淀法制备α-Fe2O3[J]. 应用化学,
2011, 28(4): 483-485.
doi:
10.3724/SP.J.1095.2011.00433
Citation: ZHANG Lingyun, GUAN Hangmin, LI Hansheng, JIANG Ke. Extraction of Fe3+ by Bi-(2-ethylhexyl) phosphate and Preparation of α-Fe2O3 by Stripping Precipitation Method with Ammonia-alcohol[J]. Chinese Journal of Applied Chemistry, 2011, 28(4): 483-485. doi: 10.3724/SP.J.1095.2011.00433
Citation: ZHANG Lingyun, GUAN Hangmin, LI Hansheng, JIANG Ke. Extraction of Fe3+ by Bi-(2-ethylhexyl) phosphate and Preparation of α-Fe2O3 by Stripping Precipitation Method with Ammonia-alcohol[J]. Chinese Journal of Applied Chemistry, 2011, 28(4): 483-485. doi: 10.3724/SP.J.1095.2011.00433
萃取Fe3+和氨水-乙醇反萃沉淀法制备α-Fe2O3
摘要:
以磷酸二异辛基酯(P204)为萃取剂,CCl4为溶剂,从Fe(NO3)2水溶液中萃取铁离子,以氨的乙醇溶液反萃含铁的有机相,通过优化控制相间传质过程,获得了Fe(OH)3前驱体,经煅烧后得α-Fe2O3粉体,采用TEM、FTIR、XRD等测试技术对α-Fe2O3进行表征。研究表明,在油水相比为1:1,水相c(Fe3+)=0.10 mol/L(pH=3.0)、油相P204为V(P204):V(CCl4)=1:3、平衡时间为20 min,Fe3+萃取率达98.44%;反萃取溶液V(氨水):V(乙醇)=1:7、陈化温度约10.0℃,制备纳米α-Fe2O3的煅烧温度为600℃较宜。
English
Extraction of Fe3+ by Bi-(2-ethylhexyl) phosphate and Preparation of α-Fe2O3 by Stripping Precipitation Method with Ammonia-alcohol
Abstract:
Fe3+ was extracted from Fe(NO3)3 by liquid phase extraction using a mixture of bi-(2-ethylhexyl) phosphate(P204) and tetrachloride carbon.Fe(OH)3 powders were prepared through stripping precipitation method with ammonia-alcohol aqueous solution as a re-extractant and precipitator.α-Fe2O3 powders were obtained by decomposing Fe(OH)3 at an appropriate temperature and characterized by TEM,FTIR,and XRD.The results show that the P204 contents are in the oil phase,Fe3+ contents are in the water phase,and the reaction time has obvious influence on the extraction of Fe3+.Under the optimum conditions of phase volume ratio at 1:1,c(Fe3+) at 0.10 mol/L(pH=3.0),volume ratio of P204 and CCl4 as 1:3,and reaction time of 20 min,98.44% of Fe3+ is extracted.α-Fe2O3 powders with a small size and uniformity are obtained at 600℃.The optimum aging temperature and concentration of ammonia aqueous are 10.0℃ and 1:7,respectively.
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Key words:
- extraction
- / stripping precipitation method
- / α-Fe2O3
- / nano-powder
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