辽宁石油化工大学学报

辽宁石油化工大学学报 ›› 2011, Vol. 31 ›› Issue (3): 16-19.DOI: 10.3696/j.issn.1672-6952.2011.03.005

• 石油化工 • 上一篇    下一篇

CuSO4/SiO2 在合成苯甲醛甘油缩醛中的应用

李国军   

  1. 华南蓝天航空油料有限公司,广东广州510405
  • 收稿日期:2011-03-22 出版日期:2011-09-25 发布日期:2017-07-05
  • 作者简介:李国军(1964-),男,辽宁铁岭市,工程师。

 
Synthesis of Benzaldehyde Glycerol Acetals Catalyzed by CuSO4/SiO2

 

LI Guo-jun
  

  1. South China Bluesky Aviation Oil Co.,Ltd.， Guangzhou Guangdong 510405, P.R.China
  • Received:2011-03-22 Published:2011-09-25 Online:2017-07-05

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摘要： 通过溶胶—胶凝法和浸渍法制备了CuSO 4/SiO2 催化剂,用XRD、低温N 2-吸附和 NH3-TPD进行
了表征,研究了CuSO 4/SiO2 在合成苯甲醛甘油缩醛上的催化性能,考察了催化剂的焙烧温度、CuSO4 负载量、原料
物质的量比、反应时间、环己烷体积等因素对产品收率的影响。结果表明:CuSO4 高度分散在SiO2 表面上形成中等
酸强度、高表面积的中孔固体酸催化剂,并在苯甲醛和甘油的缩合反应中具有良好的催化活性和稳定性。催化剂制
备的最佳条件为:焙烧温度550℃,CuSO4 的负载量为15%,反应的最佳条件为:n(苯甲醛)∶n(甘油)=1∶1.1,催
化剂质量为反应物总质量的1%,环己烷体积为10mL,反应时间2.0h。在最佳条件下,苯甲醛甘油缩醛的收率可达
92.5%。

关键词: 溶胶—胶凝,  , 浸渍 ,  固体酸 ,  , 缩合反应 ,  , 苯甲醛甘油缩醛

Abstract:  

CuSO4/SiO2 solid acid catalysts were prepared using sol-gel technique and impregnation method, and then characterized by XRD, low temperature N2-adsorption and NH3-TPD. The effects of calcination temperature of catalysts, CuSO4 loading, the molar ratio of benzaldehyde to glycerol, reaction time and amount of deaquation reagent on the synthesis yield were discussed. The results show that CuSO4 is highly dispersed over surface of SiO2 to form mesoporous solid acid catalysts with medium acid strength and high specific surface. CuSO4/SiO2 showed good catalytic activities and stabilities in the condensation of benzaldehyde with glycerol to produce benzaldehyde glycerol acetals. The optimum preparation conditions are as follows: CuSO4 loadings 15%, and calcination temperature 550 ℃. The optimum reaction conditions are as follows: molar ratio of benzaldehyde to glycerol is 1∶1.1, the weight percentage of catalyst in reaction mixture is 1%, and volume of cyclohexane is 10 mL and reaction time 2 h. Under the optimum reaction conditions, the yield of benzaldehyde glycerol acetal can reach 92.5%.

Key words: Sol-gel, Impregnation   ,  ,  Solid acid ,  , Condensation reaction ,  Benzaldehyde glycerol acetal

引用本文

李国军. CuSO4/SiO2 在合成苯甲醛甘油缩醛中的应用[J]. 辽宁石油化工大学学报, 2011, 31(3): 16-19.

LI Guo-jun.  

Synthesis of Benzaldehyde Glycerol Acetals Catalyzed by CuSO4/SiO2
[J]. Journal of Liaoning Petrochemical University, 2011, 31(3): 16-19.

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