化学学报 ›› 1995, Vol. 53 ›› Issue (7): 632-636. 上一篇    下一篇

研究论文

邻苯二甲酸钙的热分解反应研究

孙聚堂;马木艳;袁良杰   

  1. 武汉大学化学系
  • 出版日期:1995-07-15 发布日期:1995-07-15

The thermal decomposition of calcium phthalate

SUN JUTANG;MA MUYAN;YUAN LIANGJIE   

  • Online:1995-07-15 Published:1995-07-15

用热重和示差扫描量热分析法研究了-水合邻苯二甲酸钙的热分解过程。其热分解过程分为三个阶段: 在160~260℃脱水生成无水盐; 在460~780℃分解生成CaCO~3.C; 在780~900℃生成CaO和CO。用粉未X射线衍射、红外光谱和色-质联用分析法表征了各阶段热分解产物的组成和结构。讨论了热分解产物的自由基反应机理。

关键词: 钙化合物, 示差扫描量热法, 热分解, 邻苯二甲酸, 热重分析

The thermal decomposition of calcium phthalate monohydrate, CaC~8H~4O~4.H~2O, was studied by thermogravimetric analysis and differential scanning calorimetry. The products of thermal decomposition at various tages were characterized by the powder X-ray diffraction, infrared spectrometry and gas chromatography-mass spectrometry. The radical reactions in the pyrolytic process were discussed. The thermal decomposition of CaC~8H~4O~4.H~2O proceeds in three stages: It was dehydrated at 160~260℃, pyrolyzed to form CaCO~3.C at 460~780℃ and CaO at 780~900℃. Pyrolysis of CaC~8H~4O~4 at 500℃ gave (C~6H~5)2CO and CO as the main volatile products, with a large amount of fluorenone, 9,10-anthraquinone, diphenylmethane, etc.

Key words: CALCIUM COMPOUDS, DIFFERENTIAL SCANNING CALORIMETRY, THERMAL DECOMPOSITION, O-BENZENEDICARBOXYLIC ACID, THERMOGRAVIMETRY

中图分类号: