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Preparation of SO_42-/TiO_2-MoO_3 Solid Superacid and Its Catalytic Activity in Acetalation and Ketalation 认领 引用 被引量：7
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作者 杨水金 梁永光 +1 位作者 余协卿 孙聚堂 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2005年第1期51-55,共5页
SO4^2-/TiO2-MoO3, a novel solid superacid, has been prepared and its catalytic activity at different synthetic conditions was examined with esterification of n-butanoic acid and n-butyl alcohol as probing reaction.The... SO4^2-/TiO2-MoO3, a novel solid superacid, has been prepared and its catalytic activity at different synthetic conditions was examined with esterification of n-butanoic acid and n-butyl alcohol as probing reaction.The optimum conditions were also found, that is, the mass ratio of MoO3 used in the compound is 25%, the calcination temperature 450℃, and the soaked consistency of H2SO4 is 0.5mol.L^-1. Then it was applied in the catalytic synthesis of six similar important ketals and acetals as catalyst and revealed high catalytic activity. Under the condition that the molar ratio of aldehyde/ketone to glycol was 1:1.5, the mass ratio of the catalyst to the reactants was 0.5% and the reaction time 1.0 h, the yield of ketals and acetals reached up to 63.2%. The catalyst can be easily recovered and reused. 展开更多
关键词 SO_42-/TiO_2-MoO_3 solid superacid acetalation katalation
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Preparation of SO_42-/TiO_2-La_2O_3 solid superacid and its catalytic activities in acetalation and ketalation 认领 引用 被引量：4
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作者 YANG Shui-jin BAI Ai-min SUN Ju-tang 《Journal of Zhejiang University-SCIENCE B》 EI CAS 2006年第7期553-558,共6页
SO4^2- / TiO2-La2O3, a novel solid superacid, was prepared and its catalytic activities at different synthetic conditions are discussed with esterification of n-butanoic acid and n-butyl alcohol as probing reaction. T... SO4^2- / TiO2-La2O3, a novel solid superacid, was prepared and its catalytic activities at different synthetic conditions are discussed with esterification of n-butanoic acid and n-butyl alcohol as probing reaction. The optimum conditions have also been found, mole ratio of n（La^3＋）：n（Ti^4＋） is 1：34, the soaked consistency of H2SO4 is 0.8 tool/L, the soaked time of HESO4 is 24 h, the calcining temperature is 480 ℃, the calcining time is 3 h. Then it was applied in the catalytic synthesis often important ketals and acetals as catalyst and revealed high catalytic activity. Under these conditions on which the molar ratio of aldehyde/ketone to glycol is l： 1.5, the mass ratio of the catalyst used in the reactants is 0.5%, and the reaction time is 1.0 h, the yields of ketals and acetals can reach 41.4%-95.8%. 展开更多
关键词 SO4^2-/ TiO2-La2O3 Rare earth Solid superacid Catalysis
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SO_42-/SiO_2-ZrO_2固体超强酸催化乳酸乙酯的合成研究 认领 引用 被引量：5
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作者 裘小宁 《宝鸡文理学院学报（自然科学版）》 CAS 2006年第3期206-209,共4页
目的研究自制固体超强酸对乳酸乙酯的合成反应的催化效果,寻求乳酸乙酯的最佳合成条件。方法采用溶胶凝胶法制得SiO2-ZrO2基质材料,然后将其通过浸渍法制备了SO42-/SiO2-ZrO2固体超强酸,对SO42-/SiO2-ZrO2固体超强酸催化乳酸乙酯的合成... 目的研究自制固体超强酸对乳酸乙酯的合成反应的催化效果,寻求乳酸乙酯的最佳合成条件。方法采用溶胶凝胶法制得SiO2-ZrO2基质材料,然后将其通过浸渍法制备了SO42-/SiO2-ZrO2固体超强酸,对SO42-/SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应进行了研究。结果SO42-/SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应适宜的反应条件为:预焙烧温度为200℃,浸泡硫酸浓度为1.0 mol/L,硅锆摩尔比为15,焙烧温度为500℃,醇酸比为3时,酯化率可达92.7%。XRD对固体超强酸的分析结果表明,其中SiO2是三斜晶型,ZrO2是四方晶型。结论自制的SO42-/SiO2-ZrO2固体超强酸的对乳酸乙酯的合成反应具有良好的催化效果,适宜推广应用。 展开更多
关键词 SO4^2-/SiO2-ZrO2固体超强酸 乳酸乙酯 催化剂
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SO_42-/SiO_2-ZrO_2固体超强酸催化乳酸乙酯的合成研究 认领 引用 被引量：2
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作者 裘小宁 《工业催化》 CAS 2006年第8期41-43,共3页
采用溶胶-凝胶法制得SiO2-ZrO2基质材料,然后通过浸渍法制备SO42-/SiO2-ZrO2固体超强酸。对SO42-/SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应进行了研究。适宜的反应条件为:稀硫酸浸泡16 h,反应温度80℃,反应时间4 h,催化剂用量为每摩... 采用溶胶-凝胶法制得SiO2-ZrO2基质材料,然后通过浸渍法制备SO42-/SiO2-ZrO2固体超强酸。对SO42-/SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应进行了研究。适宜的反应条件为:稀硫酸浸泡16 h,反应温度80℃,反应时间4 h,催化剂用量为每摩尔乳酸1.5 g。反应酯化率达92.7%。 展开更多
关键词 SO4^2-/SiO2-ZrO2固体超强酸 乳酸乙酯 酯化反应
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An efficient synthesis of 2,2-bis(1H-indol-3-yl)-2H-acenaphthen-1-one catalyzed by recyclable solid superacid SO_42-/TiO_2 under grinding condition 认领 引用 被引量：2
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作者 Guo Liang Feng 《Chinese Chemical Letters》 SCIE CAS 2010年第9期1057-1061,共5页
An efficient synthesis of symmetrical 2,2-bis（1H-indol-3-yl）-2H-acenaphthen-1-one is achieved via a reaction of acenaphthe-nequinone and indoles catalyzed by solid superacid SO4^2-/TiO2 under solvent-free conditions... An efficient synthesis of symmetrical 2,2-bis（1H-indol-3-yl）-2H-acenaphthen-1-one is achieved via a reaction of acenaphthe-nequinone and indoles catalyzed by solid superacid SO4^2-/TiO2 under solvent-free conditions at room temperature by grinding, which provides an efficient route to the synthesis of symmetrical 2,2-bis（1H-indol-3-yl）-2H-acenaphthen-1-one.This procedure offers several advantages including solvent-free conditions,excellent yields of products,simple work-up as well as reuse of catalysts which makes it a useful and attractive protocol for the synthesis of these compounds. 展开更多
关键词 Acenaphthenequinone Indole Solid superacid SO4^2-/TiO2 2,2-Bis（1H-indol-3-yl）-2H-acenaphthen-1-one
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