期刊
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
卷 60, 期 39, 页码 14134-14142出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.1c02881
关键词
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资金
- National Natural Science Foundation of China [21978008, 21975016]
- State Key Laboratory of Chemical Engineering [SKL-ChE17A02]
- Fundamental Research Funds for the Central Universities [buctrc201617]
This study developed a continuous process to synthesize N-cyclohexyl-2-benzothiazole sulfenamide (CBS) using microfluidics, achieving a high yield of 87% with a shortened reaction time of 200 seconds. A simplified kinetic model was established based on eliminating mass transfer resistance.
Sulfenamides have attracted much attention for their significant role in rubber vulcanization. In this study, a continuous process to synthesize N-cyclohexyl-2-benzothiazole sulfenamide (CBS) with microfluidics was developed. The catalytic oxidation of 2-mercaptobenzothiazole (MBT) and cyclohexylamine using pure oxygen was performed in capillary microreactors with gas-liquid segmented flow. The residence time was shortened to 200 s owing to the enhancement of mass transfer in the microreactor. Reaction conditions such as flow rates, concentrations of copper acetate monohydrate and ammonia, temperatures, and pressures were systematically investigated. A high yield toward CBS of 87% was obtained. A simplified kinetic model (0 and 0.56 order with respect to MBT and pure oxygen, respectively) was established with operation in the kinetic-control region based on eliminating mass transfer resistance.
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