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US 9,433,929 B2Granted
Mixed metal oxide catalysts
AssigneeIneos Europe AG
InventorsJames F. Brazdil, Mark A. Toft, Stephen T. McKenna
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Abstract
Catalytic compositions are provided that are effective for providing increased acrylonitrile product without a significant decrease in hydrogen cyanide and/or acetonitrile production and provide an overall increase in production of acrylonitrile, hydrogen cyanide and acetonitrile. The catalytic compositions include a complex of metal oxides and include at least about 15% m-phase plus t-phase by weight and have a weight ratio of m-phase to m-phase plus t-phase of 0.45 or greater.
Claims7
A catalytic composition comprising a complex of metal oxides 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 0.01 to 0.1;
- 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 82 or greater and an acrylonitrile yield (% AN) plus acetonitrile yield (% ACN) plus hydrogen cyanide yield (% HCN) of 88 or more.
15 more elements
Dependencies are inferred from the claim text.