高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (1): 60.

• 论文 • 上一篇    下一篇

水合稀土一氯醋酸盐的合成及其脱水热的测定

吴淑荣1, 熊为淼2   

  1. 1. 西北大学热化学研究室;
    2. 西北大学化学系
  • 收稿日期:1985-08-28 出版日期:1987-01-24 发布日期:1987-01-24

Synthesis of Rare-Earth Monochloroacetate Hydrates and Measurement of Their Dehydration Enthalpies

Wu Shurong1, Xiong Weimiao2   

  1. 1. Thermochemical Research Laboratory, Northwest University, Xi'an;
    2. Chemistry Department, Northwest University, Xi'an
  • Received:1985-08-28 Online:1987-01-24 Published:1987-01-24

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摘要： 本文合成了La-Ga七种一氯醋酸盐的水合物,经元素分析、热重法和P2O5真空脱水法确定其组成为Ln(CH2ClCOO)3·xH2O(x=1.5,Ln=La,Ce,Pr,Sm,Eu;x=2,Ln=Nd,Gd)。用X-射线衍射测得其粉末衍射数据;用DTA-TG-DTG联用技术研究了水合盐的脱水过程;用DSC法测得各盐的脱水热值。

Abstract: In our laboratory seven hydrated rare-earth monochloroacetates, Ln(CH2ClCOO)3·xH2O(x= 1.5, Ln = La,Ce,Pr,Sm,Eu; x=2,Ln = Nd,Gd) have been synthesized and characterized by elemental analysis, thermogravimetry and dehydration over P2O6The X-ray powder diffraction data of the salts have been obtained by X-ray measurements. The thermal dehydration processes studied by TG, DTG, DTAtechniques show that the salts lose crystallization water through a single-step to yield anhydrous salts. Their dehydration enthalpies were estimated by DSC, the determinated values of enthalpies were of the precision and accuracy of 2%.

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