| 采用P507(HEH/EHP)从废FCC催化剂中回收稀土 |
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| 引用本文： | 何捍卫,孟佳.采用P507(HEH/EHP)从废FCC催化剂中回收稀土[J].中南大学学报(自然科学版),2011(9). |
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| 作者姓名： | 何捍卫 孟佳 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室; |
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| 基金项目： | 国家民口配套项目(JPPT-115-4-1632) |
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| 摘 要： | 废FCC催化剂(废石油催化炼化催化剂)中含有2%以上的富La或富Ce稀土,用盐酸浸取后可得到含有稀土元素和非稀土杂质的氯化稀土溶液。研究用P507(2-乙基己基膦酸单-2-乙基己基酯,HEH/EHP)从盐酸介质中萃取稀土的工艺方法,考察萃取分离稀土的主要影响因素。试验结果表明:可以从P507-煤油-盐酸体系中有效地萃取出稀土元素,较好地实现稀土元素和非稀土杂质的分离,其较优工艺条件为:萃取剂浓度(P507体积分数)为60%,浸取液pH为2.5,萃取相比为2:1,萃取平衡时间为30 min;负载有机相直接用盐酸进行反萃得到氯化稀土溶液,反萃盐酸浓度为2.0 mol/L,反萃平衡时间为60 min。该方法工艺简单,解决了废FCC催化剂的处理问题,减少对环境的污染,同时也回收稀土金属。
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| 关 键 词： | 废FCC催化剂 P507萃取剂 萃取 盐酸介质 稀土 |
Recycling rare earth from spent FCC catalyst using P507 (HEH/EHP) as extractant |
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| HE Han-wei,MENG-Jia.Recycling rare earth from spent FCC catalyst using P507 (HEH/EHP) as extractant[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | HE Han-wei MENG-Jia |
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| Institution: | HE Han-wei,MENG-Jia (State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China) |
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| Abstract: | Spent FCC catalyst contains more than 2% rare earth(RE) elements rich of lanthanum or cerium,and solution of rare earth chloride containing rare earth elements and non-RE impurity was obtained after leaching with hydrochloric acid.Extracting rare earth elements La and Ce from hydrochloric acid system by P507(2-ethylhexyl phosphonic acid mono 2-ethylhexyl,HEH/EHP) was studied,and the influence on the extraction and separation of rare earth was researched.The results show that rare earth can be extracted effe... |
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| Keywords: | spent FCC catalyst P507 extractant extraction hydrochloric acid system rare earth |
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