Abstract
The catalytic performance of the microporous Hβ sieve supported K2CO3 catalyst for the synthesis of dipropyl carbonates (DPC) by transesterification of dimethyl carbonate (DMC) with propyl alcohol was investigated at atmospheric pressure, and the optimized reaction conditions were acquired. The catalyst of Hβ with 28% K2CO3-loading performed best, giving 94.4% conversion of DMC and 58.7% selectivity to DPC. An optimum reactant molar ratio n(propyl alcohol)/n(DMC) existed for catalytic activity, which was about 3/1. The optimum reaction time was 10 h and the suitable reaction temperature was about 363 K considering various factors. The XRD results indicated that the structure of Hβ was gradually deformed with the increase in the K2CO3 loading. From nitrogen physisorption, it could be concluded that the improvement of the catalytic activities with the optimized K2CO3-loading about 28% can be ascribed to both enough active sites and preferable surface area and bigger pore diameter. There was no significant difference between the IR spectrums of K2CO3/Hβ catalyst before and after a 10 h reaction, which was consistent with that K2CO3/Hβ catalyst had excellent utility for repeated use. The possible mechanism of the transesterification reaction was also discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
