Extraction of Thorium(IV) with N-Methyl-N,N,N-trioctylammonium Chloride from Monazite Acidic Leach Liquor and Its Use for Spectrophotometric Determination

被引：14

作者：

Mohamed, B. T. ^{[1
]}

Guirguis, L. A. ^{[1
]}

Orabi, A. H. ^{[1
]}

Khalil, L. H. ^{[2
]}

机构：

[1] Nucl Mat Author, POB 530, Cairo, Egypt

[2] Ain Shams Univ, Fac Sci, Chem Dept, Cairo, Egypt

来源：

RADIOCHEMISTRY | 2019年 / 61卷 / 05期

关键词：

thorium extraction; monazite; N-methyl-N; N; N-trioctylammonium chloride; spectrophotometric determination; RARE-EARTH-METALS; SOLVENT-EXTRACTION; NITRIC-ACID; SYNERGISTIC EXTRACTION; URANIUM EXTRACTION; SEPARATION; TH(IV); MEDIA; LANTHANIDES; PHOSPHATE;

D O I：

10.1134/S1066362219050084

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

N-Methyl-N,N,N-trioctylammonium chloride was applied for selective extraction and separation of thorium. The Th extraction and stripping conditions were experimentally optimized. 0.75 M N-methyl-N,N,N-trioctylammonium chloride was found to be suitable for the Th separation. The extraction of Th(IV) form monazite is an exothermic process. The optimum parameters were applied to the spectrophotometric determination of Th using Thoron I at lambda(max) = 540 nm with accurate results. From the stripped liquor (1 M HNO3), Th was precipitated as thorium oxalate for technological application. Thus, marketable pure thorium product was prepared in addition to uranium and rare earth concentrates.

引用

页码：569 / 578

页数：10

共 72 条

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