摘要
研究了Na2O或K2O对苯胺和1,6己二醇气相合成1-苯基氮杂环庚烷的CoO/SiO2-Al2O3催化剂的作用,并采用X射线衍射、透射电子显微镜、H2-程序升温还原、NH3-程序升温脱附等技术对催化剂进行了表征.结果表明,Na2O助剂能增加催化剂的弱酸中心数,减少中强酸中心数,使催化剂的选择性得到提高.加入K2O使催化剂的弱酸中心数显著减少,并使CoO在反应过程中易于烧结,因此不利于1–苯基氮杂环庚烷的合成.
The CoO/SiO2-Al2O3 doped with Na2O or K2O for the vapor-phase synthesis of 1-phenylazepane from aniline and 1,6-hexanediol was studied. The catalysts were characterized by XRD, TEM, H2-TPR and NH3-TPD. The results in- dicated that Na20 not only increased the amount of weak acid sites of the catalyst, but also decreased the amount of the middle-strong acid sites, as a result, Na2O improved the selectivity of the catalyst. The addition of K2O took disadvantage of the synthesis of 1-phenylazepane for the amount of weak acid sites decreased remarkably and the CoO particles were sin- tered easily during the reaction.
出处
《分子催化》
EI
CAS
CSCD
北大核心
2012年第4期340-346,共7页
Journal of Molecular Catalysis(China)
基金
The Education Department of Liaoning Province(2009A421)
作者简介
Shi Lei, born in 1963, female, Ph. D, professor, engaging the research of heterogeneous catalysis.
Corresponding author： shilei515@ dl. en ; Tel ： 0411-82158329
