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Highly dispersed metal incorporated hexagonal mesoporous silicates for catalytic cyclohexanone oxidation to adipic acid

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Chinese Journal of Chemical Engineering 2020年第10期28卷 2542-2548页

作者： Wenjuan Yan Wenxiang Zhang Qi Xia Shuaishuai Wang Shuxia Zhang Jian Shen Xin Jin State Key Laboratory of Heavy Oil Processing Center for Chemical Engineering Experimental TeachingChina University of PetroleumQingdao 266580China College of Environment and Resources Xiangtan UniversityXiangtan 411105China

Adipic acid is a dicarboxylic acid of great industrial importance,mainly used in the production of nylon-6,6 and *** use of nitric acid as an oxidant in the industrial production of adipic acid poses significant carbon footprint to the *** adipic acid synthesis methods using a heterogeneous catalyst with H2O2 as oxidant and water as solvent have potential advantages of low catalyst cost,easy synthesis and recovery,cleanness and environmental *** this work,hexagonal mesoporous silicate materials were synthesized by a sol–gel method and evaluated for cyclohexanol/cyclohexanone oxidation to adipic *** physical and chemical properties of Fe-HMS were characterized by XRD,HR-TEM,BET and UV–*** experimental results showed that Fe-HMS materials show pore sizes ranging from 2–3 nm.W-and Mo-based polyoxometalates were also evaluated and compared to the Fe-based HMS *** improve the adipic acid yield,the influence of the transition metal as well as the effect of metal loading,reaction temperature and catalyst amount on the catalytic performances of Fe-HMS have been investigated in *** Si/Fe atomic ratio=100,Fe-HMS catalyst shows the highest activity,with a cyclohexanone conversion of 92.3%and adipic acid selectivity of 29.4%.The reaction pathway of cyclohexanone oxidation was further proposed based on experimental data.

关键词： Oxidation Adipic acid hexagonal mesoporous silicates hydrogen peroxide

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