| 氯化铵氯化-二酰异羟肟酸萃取法从粉煤灰中提取锗的研究 |
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| 引用本文： | 时文中,朱国才.氯化铵氯化-二酰异羟肟酸萃取法从粉煤灰中提取锗的研究[J].河南大学学报(自然科学版),2007,37(2):147-151,156. |
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| 作者姓名： | 时文中 朱国才 |
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| 作者单位： | 1. 黄淮学院,化学化工系,河南,驻马店,463000;清华大学,核能与新能源研究院,北京,102201
2. 清华大学,核能与新能源研究院,北京,102201 |
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| 基金项目： | 国家自然科学基金
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河南省科技攻关项目 |
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| 摘 要： | 采用氯化铵氯化—二酰异羟肟酸萃取法从粉煤灰中提取锗.即用氯化铵氯化粉煤灰中的锗,使锗以氯化物的形式挥发富集,用浓度小于6 mol/L的盐酸溶液吸收富集水解GeCl4得到氧化锗.煤灰中锗的氯化适宜条件为向粉煤灰中加入其重量20%的NaHCO3焙烧1 h,往焙砂中加入粉煤灰重量15%的氯化铵,在400℃下焙烧90min,锗的氯化回收率≥81.5%.用1.5%H2SO4(固液质量比为1∶2)进行逆流浸取氯化焙渣中的锗,调节浸出液pH=1.0,以二酰异羟肟酸(DHYA)为萃取剂,异辛醇为溶剂,磺化煤油为稀释剂,在VO/VA=1∶4、CDHYA=0.5mol/Lt、=8 min的条件下进行三级逆流萃取酸浸出液中的锗,锗总萃取率≥99.5%;用2.5 mol/L的NH4F进行二级反萃取锗,反萃率≥99.5%.氯化铵氯化焙烧—DHYA萃取法提取粉煤灰中锗的综合回收率≥95%.
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| 关 键 词： | 锗 粉煤灰 氯化铵 氯化 DHYA 萃取 |
| 文章编号： | 1003-4978（2007）02-0147-05 |
| 修稿时间： | 2006-09-16 |
Study on Extracting Germanium from Coal Ash by Chlorination with Ammonium Chloride and Extraction with Dihydroxamic Acid as Extractant |
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| SHI Wen-zhong,ZHU Guo-cai.Study on Extracting Germanium from Coal Ash by Chlorination with Ammonium Chloride and Extraction with Dihydroxamic Acid as Extractant[J].Journal of Henan University(Natural Science),2007,37(2):147-151,156. |
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| Authors: | SHI Wen-zhong ZHU Guo-cai |
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| Institution: | 1. Department of Chemistry and Chemical Engineering , Huanghuai college, Henan Zhumadian 463000,China 2. Institute of nuclear power and the neve, energy research, Tsinghua University, Beijing 102201 ,China |
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| Abstract: | |
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| Keywords: | germanium coal ash ammonium chloride chlorination dihydroxamic acid extracting |
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