Novel open-chain crown ether bridged diphosphates as chelating ligands for lanthanides extraction in supercritical carbon dioxide

被引：9

作者：

Duan, Di ^{[1
,2
]}

Su, Baogen ^{[2
]}

Bao, Zongbi ^{[2
]}

Yang, Yiwen ^{[2
]}

Ren, Qilong ^{[2
]}

机构：

[1] Guangdong Ind Tech Coll, Ctr Guangdong Higher Educ Engn & Technol Dev Spec, Dept Food & Biol Engn, Guangzhou 510300, Guangdong, Peoples R China

[2] Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2019年 / 147卷

基金：

中国国家自然科学基金;

关键词：

Diphosphates; Solubility; Metal extraction; Rare earth metals; Supercritical carbon dioxide; RARE-EARTH-ELEMENTS; FLUID EXTRACTION; SOLVENT-EXTRACTION; MOLECULAR DESIGN; BETA-DIKETONES; OPTIMIZATION; METALS; GLYCOL; IONS; SOLUBILITIES;

D O I：

10.1016/j.supflu.2019.01.022

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of highly CO2-soluble open-chain crown ether bridged diphosphates were designed and prepared as chelating ligands which were used to extract lanthanide ions from cellulose paper into supercritical CO2 (ScCO2). These ligands were designed by introducing different ester side chains and joining the two phosphorus groups with different length of ethylene oxide group which could provide enhanced solubility and complexation ability. The solubility data of these synthesized diphosophates in ScCO2 were measured at 313.15 K and 10.65 MPa-13.69 MPa. Lanthanides metal ions including La3+, Ce3+, Pr3+, Nd3+, Sm3+, Gd3+, Er3+, and Yb3+ were successfully removed from the solid matrix by supercritical fluid extractions using these chelating ligands at 313.15 K and 20 MPa. The extraction efficiency of metal ion was affected by chelating ligands' side chain, which increased from 68% to 94% mainly driven by the increased solubility capability.

引用

页码：42 / 47

页数：6

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