在支持的Ni-Cu合金催化剂上,选择性化DMAPN到DMAPA
Liming Shi1, Yuheng Liao1, Zeng Hong2
1Polytechnic Institute of Zhejiang University, Zhejiang University, Hangzhou 310027, China.
一种新的Ni-Cu合金催化剂在Al2O3上提供了一种更安全,高度选择性的方法,通过N,N-dimethyl-1,3-propanediamine (DMAPN) 化生产N,N-Dimethyl-1,3-propanediamine (DMAPA),取代危险的Raney.
科学领域:
- 催化剂是一种催化剂.
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 传统的N,N-Dimethyl-1,3-propanediamine (DMAPA) 生产使用危险的雷尼催化剂.
- 雷尼催化剂具有有限的选择性,导致不良的imine凝结副产品.
研究的目的:
- 为DMAPA合成开发一个更安全,更有选择性的催化系统.
- 为了研究 Al2O3 支持的 Ni-Cu 合金催化剂的有效性,用于 N,N-二甲胺烯酸 (DMAPN) 化.
主要方法:
- 使用X射线衍射,X射线光电子谱学和传输电子显微镜合成和描述Al2O3支持的Ni-Cu合金纳米粒子.
- 在工业相关条件下 (120°C,2.5 MPa H2) 在DMAPN化中测试催化剂的性能.
- 反应条件的优化,包括使用NH3 / 乙醇辅溶剂系统.
主要成果:
- 优化的Ni30Cu5/Al2O3催化剂实现了完整的DMAPN转化和90%以上的DMAPA选择性.
- 鉴定证实了替代Ni-Cu合金纳米颗粒的形成.
- 在NH3/乙醇辅助的过程中,提高了选择性,降低了工作压力.
结论:
- 支持Al2O3的Ni-Cu合金催化剂为DMAPA生产提供了对Raney的安全和高度选择性的替代品.
- 在Ni纳米颗粒中加入Cu可调节活性位点,抑制副作用.
- 这种催化系统为初级二胺合成提供了实际的进步.
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