Patent ID: 6756517
Filing Date: 2004-06-29
Classification: B01J,C07C,Y02P

Abstract:
In a process for producing an olefin by the vapor phase oxidative dehydrogenation of alkane having from 2 to 5 carbon atoms in the presence of molecular oxygen, the improvement comprising, carrying out the vapor phase oxidative dehydrogenation in the presence of an oxidative dehydrogenation catalyst comprising a multimetal mixed oxide having the formulaMn&agr;E1&bgr;E2&ggr;Oxâ€ƒâ€ƒ(1) where Mn denotes manganese;O denotes oxygen; E1 represents one or more metal elements selected from the group consisting of phosphorus, arsenic, antimony, boron, sulfur, selenium, tellurium, fluorine, chlorine, bromine, iodine, niobium, tantalum, tungsten, rhenium and copper; E2 represents one or more metal elements selected from the group consisting of chromium, iron, cobalt, nickel, silver, gold, zinc, thallium, tin, lead, bismuth, lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, yttrium, lanthanum, cerium, neodymium, and samarium; and, &agr;, &bgr;, &ggr; and x denote atomic numbers of Mn, E1, E2, and oxygen, respectively, and, when &agr;=1, &bgr;=0.01-10, &ggr;=0-5, and x has a numerical value determined by the state of oxidation of the elements other than oxygen.