Title: Synthesis of vanillin 1,2-propylene glycol acetal catalyzed by mesopore materials MCM-41 supported phosphotungstic acid hydrate
Abstract: Vanillin 1,2-propylene glycol acetal was synthesized using 1,2-propylene glycol and vanillin as starting materials,mesopore materials MCM-41 supported phosphotungstic acid hydrate as catalyst and cyclohexane as water stripping agent.Effects of factors on yield of product,such as molar ratio of the reactant,reaction time,the amount of water stripping agent and catalyst dosage and supported contents,were investigated.Experimental results showed that the preferential conditions are:the molar ratio of vanillin to 1,2-propylene glycol is 1∶2.4;supported contents is 50%,the dosage of catalyst is 2.0% of the total weight of the reactants;the amount of cyclohexane as water stripping agent is 15 mL;the reaction time is 2.0 h.Under these conditions,the yield can achieve 92%.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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