Shasha Wang, Z. Li, Sheng Sheng
Feb 1, 2016
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Influential Citations
26
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Journal
Journal of Chemical Technology & Biotechnology
Abstract
Background Methyl caffeate is an important intermediate for the synthesis of other caffeate esters, but its industrial production via enzymatic esterification in a batch reactor is hindered by a long reaction time (9 h). To develop a rapid process for the high-yield production of methyl caffeate, a two-piece continuous-flow poly(dimethylsiloxane) microreactor with a sandwich-like microchannel structure was designed for the esterification of caffeic acid and methanol catalyzed by Novozym 435 in [Bmim][Tf2N]. RESULTS A maximum yield of 98.45% was achieved in a short period of time (2.5 h) in the microreactor at a flow rate of 2 µL min−1, and the reaction temperature was reduced from 75°C to 70°C compared with the batch reactor. The kinetic constants Km and Vm/Km(app) were 0.76 times lower and 282.08 times higher, respectively, than those in the batch reactor. Immobilized lipase could be reused at least 23 times without losing catalytic activity. CONCLUSION The use of a continuous-flow packed-bed enzyme microreactor is an efficient method to produce methyl caffeate. © 2015 Society of Chemical Industry