高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (11): 1345.

• 论文 • 上一篇    下一篇

碱式邻苯二甲酸氢镧的热分解机理

孙聚堂1, 张克立1, 张继民1, 秦子斌1, 冯伊利2   

  1. 1. 武汉大学化学系, 武汉, 430072;
    2. 青海教育学院化学系
  • 收稿日期:1992-01-29 修回日期:1992-05-24 出版日期:1992-11-24 发布日期:1992-11-24
  • 通讯作者: 孙聚堂

The Ihermal Decomposition Mechanism of Lanthanum Hydroxide Dihydrogen Diphthalate Monohydrate

SUN Ju-Tang1, ZHANG Ke-Lu1, ZHANG Ji-Min1, QIN Zi-Bin1, FENG Yi-Li2   

  1. 1. Department of Chemistry, Wuhan University, Wuhan 430072;
    2. Department of Chemistry, Qinghai Edacation College, Xining
  • Received:1992-01-29 Revised:1992-05-24 Online:1992-11-24 Published:1992-11-24

PDF (PC)

被引次数

30

摘要： 本文测定了一水合碱式邻苯二甲酸氢镧LaOH(C8H5O4)2·H2O的热重(TG)曲线,用红外光谱、气相色谱和质谱法表征了各步热分解产物,研究了其热分解反应机理.整个热分解过程分5步进行:LaOH(C8H5O4)2·H2O→La2(C8H4O4)3→La4O(CO3)3(C8H4O4)2→La2O(CO3)2→La2O2CO3→La2O3.热分解的气相产物有邻苯二甲酸酐和9,10-蒽醌等.

关键词: 镧, 邻苯二甲酸, 热分解, 红外光谱

Abstract: The thermal decomposition of lanthanum hydroxide dihydrogen diphthalate monohy-drate, LaOH (C8H5O4)2·H2O, was studied by thermogravimetric analysis. The products of thermal decomposition at various stages were characterized by infrared spectrometry,gas chro-matography and mass spectrography.The thermal decomposition of LaOH(C8H5O4)2·H2Oproceeded in five stages. LaOH(C3H5O4)2·H2O-La2(C3H4O2)3-La4O(CO3)3(C8H4O4)2-La2O (CO3)2 La2O2CO3-La2O3,The phthalic anhydride ami 9,10-anthraquinone were formed as the condensates of gas phase products during the first and second stages, respectively.

Key words: Lanthanum complex, 1,2-Bcnzenedicarboxylic acid, Thermal decomposition, Irared spertrum

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