摘要
研究了CoO/SiO2-Al2O3催化剂上苯胺和1,6-己二醇气相催化合成1-苯基氮杂环庚烷的反应,并采用N2吸附-脱附、X射线衍射、H2程序升温还原和NH3程序升温脱附技术对催化剂进行表征.结果表明,CoO/SiO2-Al2O3催化剂表现出较高的活性和选择性.当CoO担载量为0.3mmol/g时,催化剂前体在700°C(2.8°C/min)下焙烧4h以及在325°C下50%H2-50%N2(60ml/min)混合气中原位还原2h,产物收率达到80%.催化剂的比表面积大、活性组分分散度高以及酸性较弱时有利于目标产物的生成.
Vapor-phase catalytic synthesis of 1-phenylazepane from aniline and 1,6-hexanediol over CoO/SiO2-Al2O3 catalyst was inves-tigated and the catalyst samples were characterized by N2 adsorption-desorption,X-ray diffraction,H2 temperature-programmed reduction,and NH3 temperature-programmed desorption.The results indicated that the CoO/SiO2-Al2O3 catalyst showed higher activity and selectivity.When CoO loading was 0.3 mmol/g and the catalyst precursor was calcined at 700 °C（2.8 °C/min） for 4 h followed by reduction in situ at 325 °C for 2 h in the mixture gas of 50% H2-50% N2（60 ml/min） before reaction,the yield of 1-phenylazepane could be up to 80%.The catalyst with larger specific surface area,higher dispersion of the active component,and weaker acidity favored the synthesis of the target product.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第1期144-148,共5页
基金
辽宁省教育厅基金(2009A421)
