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Calcined Mg-AI Layered Double Hydroxide as a Heterogeneous Catalyst for the Synthesis of Urea Derivatives from Amines and CO2
  • ISSN号:1001-604X
  • 期刊名称:《中国化学:英文版》
  • 时间:0
  • 分类:O614.31[理学—无机化学;理学—化学] O643.36[理学—物理化学;理学—化学]
  • 作者机构:[1]Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
  • 相关基金:The authors are grateful for the support from the Na-tional Natural Science Foundation of China (No. 21073058), the Research Fund for the Doctoral Program of Higher Education of China (20100074110014), and the Fundamental Research Funds for the Central Uni-versities.
中文摘要:

有 3:1 的 Mg/Al 臼齿的比率的锻烧的 Mg-Al 分层的双氢氧化物(LDH ) 被 X 光检查彻底地综合并且描绘衍射(XRD ) , CO2 的规划温度的解吸附作用(TPD ) ,和 thermogravimetric 分析(TGA ) 。因此,锻烧的 Mg-Al LDH 从胺和 CO2 为 disubstituted 脲的催化合成被用作催化剂。在活动的反应时间,反应温度,压力,溶剂和锻烧的温度的效果被调查了。当,结果显示脂肪族的胺, cyclohexylamine 和 benzylamine 能与 N-methyl-2-pyrrolidone (NMP ) 在锻烧的 Mg-Al LDH 催化剂上有选择地被变换成相应的脲没有使用任何使脱水的总督的溶剂。催化剂能与活动的仅仅细微的损失若干次被再循环。

英文摘要:

The calcined Mg-A1 layered double hydroxides (LDHs) with a Mg/A1 molar ratio of 3 : 1 were synthesized and characterized thoroughly by X-ray diffraction (XRD), temperature-programmed desorption (TPD) of CO2, and thermogravimetric analysis (TGA). Thus the calcined Mg-A1 LDHs were used as catalyst for the catalytic synthesis of disubstituted ureas from amines and CO2. The effects of reaction time, reaction temperature, pressure, solvent and calcined temperature on activity have been investigated. The results indicated that aliphatic amines, cyclo- hexylamine and benzylamine can be converted to the corresponding ureas selectively over the calcined Mg-A1 LDHs catalysts with N-methyl-2-pyrrolidone (NMP) as solvent without using any dehydrating regent. The catalyst can be recycled several times with only slight loss of activity.

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期刊信息
  • 《中国化学:英文版》
  • 主管单位:
  • 主办单位:中国化学会
  • 主编:
  • 地址:上海市枫林路354号中科院上海有机化学研究所
  • 邮编:200032
  • 邮箱:
  • 电话:021-54925243
  • 国际标准刊号:ISSN:1001-604X
  • 国内统一刊号:ISSN:31-1547/O6
  • 邮发代号:4-646
  • 获奖情况:
  • 中国期刊方阵“双高”期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),荷兰文摘与引文数据库,美国科学引文索引(扩展库),日本日本科学技术振兴机构数据库,英国英国皇家化学学会文摘
  • 被引量:175