2_3_5_三甲基氢醌连续合成工艺中失活催化剂的表征.pdfVIP

36 4 () Vol. 36No4 2005 8 J. CENT. SOUTH UNIV. ( SCIENCE AND TECHNOLOGY) Aug. 2005 2, 3, 5- 1, 2 1 3 3 , , , ( 1. 中南大学 化学化工学院, 湖南长沙,410083; 2. 长岭炼油化工公司催化剂厂, 湖南岳阳,414012; 3.长岭炼油化工总厂研究院, 湖南岳阳,414012) :通过对2,3,5-三甲基氢醌(T MHQ) 续合成工艺中失活催化剂活性组分硫含量比表面积及孔容的变化 催化剂表面形貌等进行分析以及对失活催化剂进行再生处理, 研究催化剂失活的原因研究结果表明: 催化剂在 运转前后活性组分含量比表面积和孔容变化不大, 不足以引起催化剂活性大幅度地下降; 催化剂中的硫含量随催 化剂运转时间的延长而增加, 但对于贵金属催化剂属无毒物; 运转后催化剂的沉积物只是疏松地吸附在催化剂的 表面, 对其比表面积和孔容的影响不大催化剂失活的一个主要原因是催化剂表面沉积了TMHQ 和少量的 2, 3, 5-三甲基苯醌 :2,3, 5-三甲基氢醌; 续工艺; 负载贵金属催化剂; 失活; 表征 :O643.31 :A : 1672-7207(2005)04-0605-05 Characteri ation of deactivated catalysts in continuous process for synthesi ing 2, 3, 5-trimethylhydroquinone 1, 2 1 2 3 QIAN Dong , HEN Q-i yuan , YANG L-i yi , ZHANG Mao-kun ( 1.School of hemistry and hemical Engineering, entral South University, hangsha 410083, hina; 2. atalyst Factory of hangling Refining and hemical ompany, Yueyang 414012, hina; 3. Research Institute of hangling General Refining and hemical Works, Yueyang 414012, hina) Abstract: One of the main causes for the deactivation of catalysts in the continuous process for synthesizing 2, 3, 5-trimethylhydroquinone( TMHQ) was investigated, which could be the deposi- tions of TMHQ and little amount of 2, 3, 5-trimethylbenzoquinone(TMBQ) via the analyses of ac- tive component loss, changes of sulphur content, BET surface area and pore volume, surface im- ages of catalysts employed