摘要
针对醋酸异丙酯催化合成过程存在的催化剂失活现象,采用"催速失活"方法考察了Fe3+对催化剂活性的影响,并对失活前后的阳离子交换树脂催化剂进行了扫描电镜观察、元素定碳分析、元素能谱鉴定、X射线荧光组成分析和X射线光电子能谱等表征。结果表明,反应介质中存在的Fe3+吸附到催化剂上,取代了磺酸基团中的H+,部分导致催化剂活性下降,磺酸基团的流失也是失活原因。
In order to reveal the deactivation mechanism of cation exchange resin catalyst, the effects of Fe^3＋ on the catalyst activity were investigated using ＇ acceleration deactivation＇ method. The structure and properties of the fresh and deactivated catalysts were characterized by SEM, element analysis, EDS, XRF and XPS techniques. The results showed that the Fe^3＋ adsorbed on the catalyst could replace the active H^＋ of sulfoacid group, which partly resulted in deactivation of the catalyst. Meanwhile, the partial loss of sulfoacid group from the catalyst was one of deactivation reasons as well.
出处
《工业催化》
CAS
2012年第5期36-40,共5页
Industrial Catalysis
关键词
催化化学
阳离子交换树脂
醋酸异丙酯
失活机理
磺酸基团
catalytic chemistry
cation exchange resin
isopropyl acetate
deactivation mechanism
sulfoacid group
