Abstract
A composite catalytic membrane (CCM), as a heterogeneous catalyst, was prepared from sulfonated polyethersulfone (SPES) and polyethersulfone (PES) impregnating polyphenylene sulfide (PPS) non-woven fabric by solvent evaporation method, which was employed to produce butyl acetate from continuous esterification of acetic acid with n-butyl alcohol in a flow-through mode. The pervaporation-assisted esterification was also carried out to promote forward reaction of the esterification through online removing the water produced. The results showed that the n-butyl alcohol conversion was over 95.0 % at the reaction temperature of 363 K, the initial acetic acid/n-butyl alcohol molar ratio of 4:1 and the residence time of 4,000 s in single flow-through mode. In the pervaporation-assisted esterification, an obvious enhancement in conversion was achieved compared with the esterification without pervaporation. And the CCMs presented a good catalytic activity and stability.
Acknowledgments
This work is supported by the National Natural Science Foundation of China (Grant Nos. 21174104 and 21204063), the Tianjin Natural Science Foundation of China (Grant No. 13JCZDJC32700) and the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) of Ministry of Education of China (Grand No. IRT13084).
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