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Synthesis of Methylal from Methanol and Trioxane over Acidic Resin
Abstract:
The synthesis of methylal from methanol and trioxane was investigated by using acidic resin as a catalyst, and a variety of solvents were also tested such as toluene, 1,4-dioxane, N,N-dimethylformamide. Comparatively, the organic solvent was suitable for obtaining the better catalytic performance. Among the acidic resin tested, Amberlyst15 showed the highest conversion. Moreover, the reaction conditions were optimized over the modified β zeolite. As a result, the proper reaction conditions are 1,4-dioxane as solvent, reaction temperature 70°C, n(methanol):n(trioxane) =2.2:1, with catalyst 5 wt% and reaction time 3 h. Under the above condition, the yield of methylal may reach about 62 % with Amberlyst 15.
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929-934
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November 2011
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© 2012 Trans Tech Publications Ltd. All Rights Reserved
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