Dawson结构磷钨酸的制备、表征及催化绿色合成乙酸正丁酯工艺研究  

The Preparation of Phosphotungstic Acid with Dawson Structure and Their Catalytic Performance on Synthesis of n-Butyl Acetate

作　　者：陶春元[1] 曹小华[1] 柳闽生[2] 徐常龙[1] 谢宝华[1] 沈勇斌[1] 

机构地区：[1]九江学院化学化工学院,江西九江332005 [2]南京晓庄学院生物化工与环境工程学院,江苏南京211171

出　　处：《江西师范大学学报（自然科学版）》2011年第5期517-521,共5页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(21161009);江西省自然科学基金(2009GQH0053);江西省教育厅科技项目(GJJ10626,GJJ11613)资助

摘　　要：制备了H6P2W18O62.13H2O催化剂,并通过FT-IR、UV-Vis、TG-DSC对催化剂进行表征.以乙酸正丁酯合成反应为探针考察催化剂的催化性能.研究了磷钨酸用量、醇酸比、反应时间和反应温度对反应的影响,并提出可能的催化机理.结果表明,最优的反应条件是:催化剂用量为0.72%(按反应体系总质量计算),醇酸比为2.0︰1.0,反应时间为2.0 h,反应温度为125℃,在此条件下酯化率可达96.83%.Abstract： Phosphotungstics acid with Dawson structure and characted by FT-IR, UV-Vis and TG-DSC. The catalytic performance in synthesis of n-Butyl acetate with acetic acid and n-butanol was investigated and the mechanism was discussed. The optimized condition were as follows： the mass ratio of the catalyst to total reactant was 0.72%, the molar ratio of n-butyl alcohol to acetic acid was 2.0 ： 1.0, the reaction time was 2.0 h, the reaction temperature was 125 °C. Yield of n-Butyl acetat could reach 96.83% under the optimum conditions.

关 键 词：Hν6Pν2Wν1806213Hν20 乙酸正丁酯 酯化反应 

分 类 号：O623.624[理学—有机化学]