| 主权项 |
1. A process for production of acrylonitrile comprising contacting propylene, ammonia and oxygen in a vapor phase in the presence of a metal oxide catalyst, the metal oxide catalyst having a formula:
Mo12BiaFebAcDdEeFfGgCehOx wherein A is at least one element selected from the group consisting of sodium, potassium, rubidium and cesium; D is at least one element selected from the group consisting of nickel, cobalt, manganese, zinc, magnesium, calcium, strontium, cadmium and barium; E is at least one element selected from the group consisting of chromium, tungsten, boron, aluminum, gallium, indium, phosphorus, arsenic, antimony, vanadium and tellurium; F is at least one element selected from the group consisting of a rare earth element, titanium, zirconium, hafnium, niobium, tantalum, aluminum, gallium, indium, thallium, silicon, germanium, and lead; G is at least one element selected from the group consisting of silver, gold, ruthenium, rhodium, palladium, osmium, iridium, platinum and mercury; a is from 0.05 to 7; b is from 0.1 to 7; c is from 0.01 to 5; d is from 0.1 to 12; e is from 0 to 5; f is from 0 to 5; g is from 0 to 0.2; h is from 0.01 to 5; and x is a number of oxygen atoms required to satisfy valence requirements of other component elements, wherein the catalytic composition includes at least about 15% m-phase plus t-phase by weight and has a weight ratio of m-phase to m-phase plus t-phase of 0.45 or greater, where amounts of m-phase and t-phase are determined using x-ray diffraction and a modified Rietveld analysis model, wherein the catalytic composition is effective for providing an acrylonitrile yield (% AN) of 81 or greater and an acrylonitrile yield (% AN) plus acetonitrile yield (% ACN) plus hydrogen cyanide (% HCN) of 88 or more. |
