首页> 外国专利> 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

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

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.
机译:描述了一种方法,该方法使用银催化剂在少于化学计量的氧气存在下将甲醇转化为甲醛。使所得甲醛在不分离的情况下与丙醛在可商购的锐钛矿型二氧化钛催化剂上反应,该催化剂显示出对甲醛和丙醛形成甲基丙烯醛具有催化活性,转化率和选择性接近90%。该二氧化钛催化剂易于获得,无毒,可与甲醛和多种其他醛化合物一起使用,以制备α,β-不饱和醛化合物。该方法得益于较低的原材料成本,并且由于消除了催化剂分离而在经济上具有优势。在寿命研究期间,特别是在存在氢气载气的情况下进行时,该过程显示出有希望的稳定性和选择性。

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