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EFFICIENT SYNTHESIS OF METHACROELIN AND OTHER ALPHA, BETA-UNSATURATED ALDEHYDES FROM METHANOL AND AN ALDEHYDE
EFFICIENT SYNTHESIS OF METHACROELIN AND OTHER ALPHA, BETA-UNSATURATED ALDEHYDES FROM METHANOL AND AN ALDEHYDE
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机译:从甲醇和乙醛高效合成甲氧丁香酚碱和其他α-,β-不饱和的乙醛
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摘要
A process is described that uses a silver catalyst to convert methanol into formaldehyde in the presence of less than a stoichiometric amount of oxygen. The resulting formaldehyde is reacted without isolation with propionaldehyde over a commercially available anatase titania catalyst that is shown to be catalytically active towards the formation of methacrolein from formaldehyde and propionaldehyde with conversions and selectivities close to 90%. This titania catalyst is readily available, non-toxic, and can be used with formaldehyde and a variety of other aldehyde compounds to make α,β-unsaturated aldehyde compounds. This process benefits from low raw material costs and is economically advantaged due to the elimination of catalyst separation. This process shows promising stability and selectivity during lifetime studies, particularly when performed in the presence of a hydrogen carrier gas.
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