J. Machek et al., IMPROVEMENT OF PROPERTIES OF CATALYST FOR INDUSTRIAL-PRODUCTION OF ACROLEIN FROM PROPYLENE, Collection of Czechoslovak Chemical Communications, 59(7), 1994, pp. 1536-1544
The catalytic gas-phase oxidation of propylene on a multicomponent Mo-
Co-Fe-Bi-K-0 catalyst gives up to 85% yield of acrolein and acrylic ac
id along with undesirable side products - formaldehyde and acetaldehyd
e. Effects of four factors have now been studied with the aim of suppr
essing of formation of the by-products viz. the effect of potassium co
ntent in the catalyst, that of final annealing temperature of the cata
lyst, and those of addition of other components (tungsten, nickel). It
has been found that a change in potassium content in catalyst affects
distinctly its activity and also selectivity for products of total ox
idation of propylene but does not practically affect the yields of for
maldehyde and acetaldehyde. The yields of the said side products decre
ased with increasing annealing temperature, however, with concomitant
considerable decrease in the catalyst activity. Whereas a partial subs
titution of molybdenum atoms in the catalyst by tungsten atoms is acco
mpanied by an increase in production of formaldehyde and acetaldehyde,
some catalysts with nickel gave acrolein as the only aldehyde.