聚乙二醇对有机溶剂中氟化锂的增溶作用及机理  

Solubility Enhancement and Kinetics of Lithium Fluoride in Organic Solvent by Inclusion with PEG

作　　者：徐行[1] 戴璇[1] 熊绍辉[1] 喻桂朋[1] 潘春跃[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《广州化工》2013年第13期94-96,共3页GuangZhou Chemical Industry

基　　金：湖南有色集团-中南大学有色金属研究基金项目(2010~2012)

摘　　要：比较研究了聚乙二醇(PEG)分别对乙腈(AC)、乙二醇二甲醚(DME)和碳酸二甲酯(DMC)中的氟化锂的增溶作用和机理。采用火焰原子吸收光谱法(FAAS)分别测定了常温下含不同体积分数PEG的AC、DME和DMC中氟化锂的溶解度,并对溶解度数据进行了热力学计算。实验结果表明:PEG体积分数在0～10%时,氟化锂在AC、DME和DMC中的溶解度最大程度分别增加了27倍、14倍和1倍。the effect and mechanism of that lithium fluoride in acetonitrile, ethylene glycol dlmethyl ether （ DME） and dimethyl carbonate （DMC） were discussed, respectively, solubilized by polyethylene glycol （PEG）. Solubilities of lithium fluoride in acetonitrile, DME and DMC with different volume fraction of PEG at room temperature were respectively measured by Flame Atomic Absorption Spectrometry （FAAS） , and the solubility data was then thermodynamically calcu- lated. The results showed that in a certain volume fraction range, PEG can solubilize lithium fluoride in each of the above - mentioned organic solvents at different levels, and the solubility of lithium fluoride in acetonitrile, DME, and DMC was respectively increased by at least 28 times, 15 times and 2 times with the change of PEG.

关 键 词：氟化锂 PEG 增溶作用 火焰原子吸收光谱法 

分 类 号：TQ152[化学工程—电化学工业]