现代化工

现代化工 ›› 2019, Vol. 39 ›› Issue (3) : 152-155. DOI: 10.16606/j.cnki.issn0253-4320.2019.03.034

科研与开发

用TBP从POX工艺酸沉浓缩液中萃取分离Mo、Re的研究

勾明雷, 牛青山

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Extraction of Mo and Re from POX concentrate after acid precipitation by TBP

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Received		Published
2018-07-12		2019-03-20
Issue Date	Revised Date
2019-03-13	2018-07-12

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摘要

以TBP为萃取剂，从POX工艺酸沉浓缩液中分离回收Mo、Re，分别考察了浓缩液pH、相比（O/A）、萃取时间、萃取温度等对Mo、Re萃取率的影响。结果表明，在25℃、pH=2、相比O/A=1∶2时，Mo的萃取率可达99.5%，Mo对Re的分离系数高达181左右；萃取Mo结束后，将萃余液pH调至-0.5左右，在25℃、相比O/A=1∶1条件下，Re的萃取率可达99.6%，Re对Mo的分离系数高达500左右。

Abstract

Mo and Re are extracted from the concentrate after acid precipitation in POX technology by using TBP as extractant.Effects of pH,the ratio of organic phase to aqueous phase (O/A),time and temperature on the extraction rates of Mo and Re are investigated.The results show that the extraction rate of Mo can reach 99.5% and the separation factor of Mo to Re is about 181 at 25℃,pH=2 and O/A=1:2.After extraction of Mo is completed,pH of the raffinate is adjusted to -0.5,the extraction rate of Re can reach 99.6% and the separation factor of Re to Mo is about 500 at 25℃ and O/A=1:1.