Supported catalyst for acrolein oxidation
AssigneeCelanese Corporation
InventorPeter C. Richardson
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Abstract
An improved catalyst for use in a process for the vapor phase conversion of an unsaturated aldehyde (such as acrolein) to the corresponding unsaturated carboxylic acid (such as acrylic acid) is disclosed. The improved catalyst comprises an unagglomerated, supported catalyst having the empirical formula Mo.sub.a V.sub.b W.sub.c Mn.sub.d O.sub.e, the atomic ratio of Mo:V:W:Mn:O being such that when a is 12, b is 0.5 to 12, c is 0.1 to 6, d is 0.5 to 20 and e is 37 to 94, supported on porous silica particles having a surface area of from about 25 to about 350 m.sup.2 /gm and a porosity of from about 0.2 to about 1.0 cc/gm, whereby essentially all of the catalytic metals is contained on the surfaces of the particles.
Claims11
An unagglomerated catalyst adapted for use in the catalytic conversion of a monoethylenically unsaturated acrylic aldehyde to the corresponding monoethylenically unsaturated acyclic carboxylic acid having the empirical formula Mo.sub.a V.sub.b W.sub.c Mn.sub.d O.sub.e, the atomic ratio of Mo:V:W:Mn:O being such that when a is 12, b is 0.5 to 12, c is 0.1 to 6, d is 0.5 to 20 and e is 37 to 94, contained on a porous silica support particle having a surface area of from about 25 to about 350 gm/m.sup.2 and a porosity of from about 0.2 to about 1.0 cc/gm, the catalytic metals being contained essentially only on the surfaces of the particles.
Dependencies are inferred from the claim text.