“…Ostromyslenskii considered the conversion to involve probably dehydration to 2-butene, dehydrogenation to cyclobutene, and isomerization of the latter ( 136 There are several reasons why butadiene should be formed from diethyl ether over aluminum at 300-600°C. First, ethanol and ethene, which are respectively expected and actual products, are each directly convertible into butadiene under similar conditions (21,23,72). Ethanal, another product, upon dimerization to 3-hydroxybutanal, with or without dehydration to 2-butenal, would be a further source of alkadiene.…”