CATALYST AND PROCESS FOR THE CATALYTICALLY OXIDATIVE DEHYDROGENATION OF ALKYL AROMATICS

摘要

PCT No. PCT/EP95/02483 Sec. 371 Date Mar. 13, 1997 Sec. 102(e) Date Mar. 13, 1997 PCT Filed Jun. 26, 1995 PCT Pub. No. WO96/01796 PCT Pub. Date Jan. 25, 1996Alkenylaromatics are produced by catalytic oxidative dehydrogenation of alkylaromatics employing a redox catalyst which is bismuth oxide, in combination with an additive compound of an alkali metal and/or an alkaline earth metal, on a titanium diooxide carrier. In a first reaction step, an alkylaromatic starting material is oxidatively dehydrogenated with the redox catalyst in the absence of molecular oxygen with attending reduction of the redox catalyst. In a second reaction step, the reduced redox catalyst is reoxidized with an oxygen-containing gas.