摘要
本文测定了一水合碱式邻苯二甲酸氢镧LaOH(C_8H_5O_1)_2·H_2O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(C_8H_5O_1)_2·H_2O→La_2(C_8H_4O_4)_3→La_1O(CO_3)_3(C_8H_4O_4)_2→La_2O(CO_3)_2→La_2O_2CO_3→La_2O_3.热分解的气相产物有邻苯二甲酸酐和9,10-蒽醌等.
The thermal decomposition of lanthanum hydroxide dihydrogen diphthalate monohy-drate, LaOH (C8H6O4)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·H2O proceeded in five stages. LaOH(C3H5O4)2·H2O-La2(C3H4O1)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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第11期1345-1348,共4页
Chemical Journal of Chinese Universities
关键词
镧
邻苯二甲酸
热分解
红外光谱
Lanthanum complex,1 ,2-Bcnzenedicarboxylic acid,Thermal decomposition,Irared spertrum
