Patent ID: 7790934

Claim:
A process for preparing acrolein by dehydrating glycerol in the presence of a solid-state catalyst which comprises at least one tungsten compound selected from the group consisting of ammonium tungstate, tungstic acid, and tungsten oxides and has a Hammett acidity H o of <+2 and which includes at least one promoter compound selected from the group consisting of components of gold, silver, copper, vanadium, platinum, rhodium, palladium, ruthenium, samarium, cerium, yttrium, scandium, lanthanum, zinc, magnesium, cobalt, nickel and mixtures thereof, and optionally a compound of an element selected from the group consisting of lithium, sodium, potassium or cesium, and mixtures thereof, and/or montmorillonite or an acidic zeolite.