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中文摘要：
以多壁碳纳米管（MwCNTs）为载体，采用浸渍法制备了H6P2W18O62·nH2O／MwCNTs催化剂，对其进行了FT—IR、EDX、XRD、SEM表征，并以乙酸和正丁醇合成乙酸正丁酯为探针反应，考察了催化剂的酸催化性能，以及反应条件和催化剂重复使用次数对酯化率的影响。结果表明，H6P2W18O62·nH2O／MWCNTs催化活性高于单一组分的H6P2W18O62·13H20和MWCNTs。该酯化反应的最佳条件为磷钨酸负载量50％，催化剂用量（按反应体系总质量计）0．6％，醇／酸摩尔比2，反应温度120℃，反应时间2．0h。此时，酯化率可达97．1％。催化重复使用5次后，酯化率仍可达60．9％，
英文摘要：
Phosphotungstic acid/multiwalled carbon nanotubes catalyst （H6 P2 W18 O6e . nil20/MWCNTs ） was prepared by dipping acid on MWCNTs in the mixing solution of phosphotungstic acid with Dawson structure, and characterized by FT-IR, EDX, SEM and XRD. The catalyst was applied in the catalytic synthesis of n-butyl acetate （BAC） with acetic acid and n-butanol. The effects of various factors and repeated times of the catalyst on the esterification rate of BAC synthesis were discussed. The results indicated that the catalytic activity of H6P2W18O62· nH2O/MWCNTs catalyst was higher than that of Dawson phosphotungstic acid and rnultiwalled carbon nanotubes alone, with the esterification rate phosphotungstic acid loading amount, up to 97.1% under the optimal conditions of 50% the catalyst amount of 0.6% to the total raw materials amount, 2 of the molar ratio of n-butyl alcohol to acetic acid, the reaction temperature of 120℃, the reaction time of 2.0 h. The catalyst could be reused for 5 times and the esterification rate of n-butyl acetate was still above 60.9 %.
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Clean Oxidation of Cyclohexanone to Adipic Acid Catalyzed by Ammonium Phosphomolybdate with Dawson s
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