Collection of Czechoslovak Chemical Communications p. 2867 - 2874 (1993)
Update date:2022-08-11
Topics:
Machek, Jaroslav
Tichy, Josef
Svachula, Jiri
The catalytic gas-phase oxidation of isobutene has been studied on polycomponent Mo-Co-Ni-Bi-Fe-K oxide catalyst suitable for industrial preparation of propenal from propene.It has been found that within the temperature interval of 290 - 350 deg C the main oxidation products are 2-methylpropenal, acetone, 2-methylpropenoic acid, acetic acid and carbon dioxide.A modification of the mentioned catalyst by addition of a further component (W, P, Te, and Zn) showed that zinc increses the conversion of isobutene and at the same time markedly increases its selectivity for 2-methylpropenal, whereas the additions of tungesten and phosphorus decrease the conversion of isobutene with a simultaneous increase of selectivity for CO2.If tert-butyl alcohol is used as the starting material instead of isobutene, then the extent of reaction is slightly decreased with simultaneous increase of selectivity for 2-methylpropenal, whereas the selectivities for the acids remain almost unchanged.
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