Patent ID: 6710207
Filing Date: 2004-03-23
Classification: B01J,C07C,Y02P

Abstract:
A method for producing an unsaturated carboxylic acid, which comprises subjecting a mixture of an alkene and an alkane to a single-pass vapor phase catalytic oxidation reaction in the presence of a catalyst containing a mixed metal oxide having the formulaAaMmNnXxOo wherein A is at least one element selected from the group consisting of molybdenum and tungsten, M is at least one element selected from the group consisting of vanadium and cerium, N is at least one element selected from the group consisting of tellurium and selenium, and X is at least one element selected from the group consisting of niobium, tantalum, titanium, aluminum, zirconium, chromium, manganese, iron, ruthenium, cobalt, rhodium, nickel, platinum, bismuth, boron, indium, arsenic, germanium, tin, lithium, sodium, potassium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, hafnium, lead, phosphorus, promethium, europium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, gold, silver, palladium, gallium, zinc, praseodymium, rhenium, iridium, neodymium, yttrium, samarium and terbium; andwherein when a=1, m=0.01 to 1.0, n=0.01 to 1.0, x=0.01 to 1.0 and o is dependent on the oxidation state of the other elements.