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Determination of kinetic parameters of homogenous continuous flow esterification of monobutyl chlorophosphate in a microreactor
Author(s) -
Zhang Yuqiang,
Li Jun,
Jin Yang,
Chen Ming,
Wang Yubin
Publication year - 2020
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23679
Subject(s) - micromixer , microreactor , kinetics , mixing (physics) , thermodynamics , butanol , activation energy , materials science , chemistry , chemical engineering , catalysis , organic chemistry , ethanol , physics , quantum mechanics , engineering
Synthesized by phosphorus oxychloride and n ‐butanol, tri‐ n ‐butyl phosphate from a three‐step esterification reaction has an extensive range of applications in industrial processes. Similarly, monobutyl chlorophosphate can be obtained rapidly by mixing n ‐butanol and phosphorus oxychloride. In view of this, we investigated the kinetics of esterification of monobutyl chlorophosphate with a microchannel system composed of micromixer and coiled capillaries. The reaction started from mixing the phosphorus oxychloride solution and n ‐butanol solution in a micromixer, with temperature and residence time in a delayed loop controlled, and then quenching the solution in a container with magnetic agitation. The rate constants for the esterification reaction of monobutyl chlorophosphate were determined to be within a temperature range of 298‐318 K. It was found that the reaction kinetics is second order with respect to monobutyl chlorophosphate concentration and first order to n ‐butanol concentration. In our research, a kinetic model was established, the values of the pre‐exponential factor and the activation energy of the reaction were obtained. The reaction kinetic model can interpret the synthesis mechanism of phosphate esters well, thus playing a guiding role in process intensification of phosphate esters synthesis in the future. Additionally, our model is also valuable because it contributes to the establishment of a reaction kinetics network model for the cascade reaction to synthesize phosphate esters.