Co-Extraction of U(VI) and HNO3 Using TBP and its Higher Homologues TiAP and TEHP: Comparison of Equilibria, Kinetics, and Rate of Extraction

被引：11
作者：
Das, Diptendu [1 ]
Juvekar, V. A. [1 ]
Roy, S. B. [2 ]
Bhattacharya, R. [3 ]
机构：
[1] Indian Inst Technol, Dept Chem Engn, Bombay 400076, Maharashtra, India
[2] Bhabha Atom Res Ctr, Uranium Extract Div, Bombay 400085, Maharashtra, India
[3] Atom Energy Regulatory Board, Bombay, Maharashtra, India
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2015年 / 50卷 / 03期
关键词：
TiAP; nitric acid; TEHP; U(VI); bulk liquid membranes; TBP; co-extraction; liquid emulsion membranes; NITRIC-ACID SOLUTIONS; 3RD PHASE-FORMATION; ISO-AMYL PHOSPHATE; N-BUTYL PHOSPHATE; TRIBUTYL-PHOSPHATE; URANYL-NITRATE; URANIUM(VI); DODECANE; SYSTEMS; OCTANE;
D O I：
10.1080/01496395.2014.973508
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this work, bulk-liquid membrane (BLM) system is used to compare tri-n-butyl phosphate (TBP), tri-isoamyl phosphate (TiAP), and tris(2-ethylhexyl) phosphate (TEHP) for their relative ability to co-extract U(VI) and nitric acid from aqueous nitric acid feed-phase into water strip-phase, through hydrocarbon membrane-phase. The kinetics of extraction is modelled and the model is validated through experiments. The quantity which determines the efficiency of liquid emulsion membrane (LEM) process is the relative rate of extraction of U(VI) to nitric acid. This is in the order TiAP>TEHP>TBP, indicating that TiAP is most suitable for extraction of U(VI) from nitric acid using LEM.
引用
收藏
页码：411 / 420
页数：10
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