Catalytic dehydration of 1,2-propanediol into propanal
2009; Elsevier BV; Volume: 366; Issue: 2 Linguagem: Inglês
10.1016/j.apcata.2009.07.018
ISSN1873-3875
AutoresKeitaro Mori, Yasuhiro Yamada, Satoshi Sato,
Tópico(s)Polyoxometalates: Synthesis and Applications
ResumoVapor-phase catalytic dehydration of 1,2-propanediol was investigated over several catalysts, such as acidic oxides and supported heteropoly acids. These acids catalyze the dehydration of 1,2-propanediol to produce propanal. In particular, silica-supported silicotungstic acid showed the highest catalytic activity in the formation of propanal. At low conversions, however, propanal reacted with another 1,2-propanediol to produce a cyclic acetal (2-ethyl-4-methyl-1,3-dioxolane). Such acetal formation reduced the selectivity to propanal. Under optimum reaction conditions, 100% conversion was attained with propanal selectivity higher than 93 mol% at 200 °C.
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