Extraction of molybdenum and vanadium from hydrochloric acid by tri-n-butyl phosphate in various diluent solutions.
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概要
- 論文の詳細を見る
The mechanism of extraction was studied, employing several diluents with differing electron-accepting properties. For molybdenum, from 3-7 mol/l acid, the following formulation holds for all diluents and over the whole range of loading ratio of TBP. 2TBP+MoO22++2CL-=(TBP)2MoO2CL2 KexThe extraction constants are 4.42 for n-heptane, 1.50 for xylene and 0.0114 for chloroform at low loading. They start to decrease sharply at medium and high loading. This is caused by the variation of properties of the organic solution due to the presence of the excessive amount of organic molybdenum. For vanadium, from 2-5 mol/l acid, the following formulations hold in the range observed. 4TBP+VO2++H++3CL-=(TBP)4VO(HCL)CL2 Kex.1 4TBP+VO2+2CL-=(TBP)4VOCL2 Kex.2The constants are Kex, 1 = 1.41 × 10-5 and Kex, 2=9.19 × 10-5 in xylene diluent. They remain constant in the range of normal operation, since the extractability of TBP for this metal is very low.
- 公益社団法人 化学工学会の論文
著者
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Komasawa Isao
Department Of Chemical Engineering Faculty Of Engineering Science Osaka University
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OTAKE TSUTAO
Department of Chemical Engineering, Osaka University
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HOSOBA HIROYUKI
Department of Chemical Engineering, Osaka University
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KUROKAWA NOBUHIRO
Department of Chemical Engineering, Osaka University
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OTAKE TSUTAO
Department of Chemical Engineering, Faculty of Engineering Science, Osaka University
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