Acidity on Extraction Mechanism of La(Ⅲ) in P204-HCl-H3AOH Extraction System

doi:10.3696/j.issn.1672-6952.2010.01.005

Journal of Liaoning Petrochemical University ›› 2010, Vol. 30 ›› Issue (1): 15-18.DOI: 10.3696/j.issn.1672-6952.2010.01.005

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Acidity on Extraction Mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH Extraction System

LI Jian-hong¹, CHANG Hong-tao², WU Wen-yuan²

1.Liaoning Shihua University, Fushun Liaoning 113001, P.R.China; 2.Northeastern University, Shenyang Liaoning 110004, P.R.China

Received:2009-09-01 Published:2010-03-25 Online:2017-07-05

酸度对P₂₀₄-HCl-H₃AOH 体系萃取La(Ⅲ)的机理影响

李剑虹1,常宏涛2,吴文远2

1.辽宁石油化工大学,辽宁抚顺113001;2.东北大学,辽宁沈阳110004

作者简介:李剑虹(1978-),女,辽宁抚顺市,讲师,博士。

Abstract

Abstract:

In the conditions of pH >1, 0<pH≤1 and pH<0, P₂₀₄-kerosene system and the organic phase loading La in the P₂₀₄-HCl-H₃AOH were studied by infrared spectroscopy. The effect of acidity on extraction mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH extraction system was investigated. The results show that displacement reaction between La and P-OH, and the mechanism is cation exchange when the value of pH>1. Both the group of P=O and the group of P-OH react with La and the extraction mechanism is the dual mechanism theory of cation exchange mechanism and salvation complex mechanism. Thus, the extraction capacity of La in the condition of 0<pH≤1 is increased. When the value of pH≤0, the two groups of P=O and P-OH, especially P=O, take part in the complex reaction.

Key words: P₂₀₄-HCl-H₃AOH , , Acidity , , Distribution ratio , , La , , Infrared spectroscopy , , Extraction mechanism

摘要： 在pH >1、0<pH≤1、pH <0三种条件下,对P₂₀₄-煤油体系以及P₂₀₄-HCl-H₃AOH 体系负载
La有机相进行红外光谱测试,研究了酸度对P₂₀₄-HCl-H₃AOH 体系萃取La(Ⅲ)的机理影响。研究结果表明,当
pH>1时,萃取过程的实质是La离子与P-OH 置换,遵循阳离子交换机制;0<pH≤1时,萃取过程是由P=O 基
团与P-OH 基团同时参与与La的配合作用,其配合机制为阳离子交换机制和溶剂化配合双重机制,该机制增强了
对La的萃取能力使萃取容量提高;pH≤0时,萃取过程是由P=O 基团与P-OH 基团同时参加的配合反应,但是P
=O 基团占主要优势。

关键词: P₂₀₄-HCl-H₃AOH , , , 酸度 , , 分配比 , , , La , , 红外光谱 , , , 萃取机理

LI Jian-hong, CHANG Hong-tao, WU Wen-yuan. Acidity on Extraction Mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH Extraction System[J]. Journal of Liaoning Petrochemical University, 2010, 30(1): 15-18.

李剑虹,常宏涛,吴文远. 酸度对P₂₀₄-HCl-H₃AOH 体系萃取La(Ⅲ)的机理影响[J]. 辽宁石油化工大学学报, 2010, 30(1): 15-18.

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Acidity on Extraction Mechanism of La(Ⅲ) in P₂₀₄-HCl-H₃AOH Extraction System

酸度对P₂₀₄-HCl-H₃AOH 体系萃取La(Ⅲ)的机理影响

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