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能够很好的使用长难句且句法很棒；作者词汇基础扎实，拼写也很棒；行文较为流畅，作者文中过渡词使用的不错。
Dear editor, We submit the manuscript entitled “Coupling reaction of supercritical carbon dioxide with styrene epoxide over Cu(acac)2 and n-Bu4NBr supported on Fe3O4@MCM-41” to “Journal of Industrial and Engineering Chemistry” to be considered for publication as a research paper. This work is focused on developing a novel binary supported catalyst for styrene carbonate (SC) synthesis based on homogeneous co-catalyst generally employed previously. Excellent result of SC yield at 87.5% was obtained with recyclable catalyst, which is close to that obtained using homogeneous catalyst and may supply potential practical application. In addition, all authors have read and approved this version of the article, and due care has been taken to ensure the integrity of the work. No part of this manuscript has been published or submitted elsewhere. Carbon dioxide (CO2) is not only a greenhouse gas but also the greatest carbon resource in the world. In recent years, much attention has been paid to the chemical fixation of CO2 to obtain useful intermediates and chemicals as the emission of CO2 into the atmosphere increases. Direct synthesis of cyclic carbonates from CO2 is one of the most promising fields in the utilization of CO2. Although the synthesis of SO from CO2 has been explored, most of the works are traditionally focused on the homogeneous catalysis. It generally suffers from the separation of catalyst after the reaction. The goal of this work is to develop a recyclable catalyst for the synthesis of SC via the coupling reaction of styrene oxide with CO2. A binary supported catalyst Cu(acac)2/n-Bu4NBr/Fe3O4@MCM-41 was obtained by supporting Cu(acac)2 and n-Bu4NBr on Fe3O4@MCM-41 together. Amazingly, Cu(acac)2/n-Bu4NBr/Fe3O4@MCM-41 revealed higher catalytic performance than that of homologous homogeneous co-catalyst composed of Cu(acac)2 and n-Bu4NBr in terms of the conversion of styrene oxide and the yield of SC. In addition, the supported catalyst can be easily recovered by a permanent magnet after the reaction and reused without significant loss in activity during the initial 3 cycles. In short, Cu(acac)2/n-Bu4NBr/Fe3O4@MCM-41 is an effective and recoverable catalyst for the direct synthesis of styrene carbonate by using carbon dioxide as carbon resource. We appreciate your consideration of our manuscript, and we look forward to receiving comments from the reviewers. Correspondence and phone calls about the manuscript should be directed to Guozhi Fan at the following address: Prof. Guozhi Fan School of Chemical and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China
