Comparative study on the catalytic properties of amino-functionalized silica materials for the transesterification of dimethyl oxalate with phenol

Journal of the Brazilian Chemical Society

Liu, Gang¹  Liu, Yan¹  Zhu, Wanchun¹  Chinese Academy of Sciences, Qingdao, China¹  Zhao, Guoming¹  Jia, Mingjun¹  Zhang, Wenxiang¹  Jilin University, Changchun, China¹  Wang, Jing¹ 

关键词: amino-functionalized;    MCM-41;    dimethyl oxalate;    transesterification;    recyclability.;   

DOI  :  10.1590/S0103-50532010001200012

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

A series of hybrid mesoporous MCM-41 materials containing different amino groups (such as 3-aminopropyl (AP-), (2-aminoethylamino)propyl (AAP-), or [2-(2-aminoethylamino)ethylamino]propyl (AEP-) group) were prepared by a post-grafting method, and characterized by means of X-ray powder diffraction (XRD), N2 adsorption, Fourier transform-infrared spectroscopy (FT-IR) and temperature-programmed desorption of CO2 (CO2-TPD). The catalytic properties of these hybrid materials were investigated for the transesterification of dimethyl oxalate with phenol. All the samples were active for the transesterification. Among them, the sample AEP-MCM-41 exhibited the highest activity under test conditions. And only a slight decrease in activity could be observed after few runs, indicating the good recyclability of this catalyst. Notably, the activity of the used catalyst could be regenerated by simple treatment with diluted basic agents under mild conditions. Moreover, effects of the density and the basic strength of the amino groups on the catalytic properties were taken into consideration for understanding the reaction mechanism and the possible formation route of the by-product anisole.

【 授权许可】

Unknown