method for catalytic oxidation of alpha olefins to the corresponding alpha, beta olefinisch ungesaettigten aldehydes or nitrilen with molecular oxygen in the gaseous phase

摘要

1437235 Oxidation and ammoxidation of olefines BASF AG 11 Oct 1973 [12 Oct 1972] 47470/73 Heading C2C [Also in Division B1] The gas phase oxidation or ammoxidation of α-olefins to α,#-unsaturated aldehydes or nitriles with O 2 in the presence of an inert gas and the presence or absence of steam at 280-450‹ C. is effected in the presence of an oxidic catalyst comprising Mo, Bi and minor amounts of one or more of In, Al, La or Ga. Preferred catalysts have the formula where MeSP1/SP is In and/or Ga and/or La and/or Al, MeSP2/SP is Fe and/or Cu, MeSP3/SP is Ni and/or Co, MeSP4/SP is one or more of P, B, As, Cr, V and W, MeSP5/SP is one or more of Ag, Pb, Mn, Re, Sn, Ge, Sm, Nb, Ta, Mg, Ca, Sr, Ba and Be, a is 12, b is 0À1- 6, c is 0À005-3, d is 0À1-8, e is 0-16, f is 0- 6, g is 0-3 and h is 36-102. Examples prepare acrolein and methacrolein with some acrylic and methacrylic acids from propene and isobutene respectively and acrylonitrile from propene. Acrylic acid is prepared by a two stage process in which the reaction mixture containing acrolein from the above reaction is further oxidized to acrylic acid with a catalyst selective for this reaction.