Rohm and Haas Company

Rohn and Haas Company

Fernando Antonio Pessoa Cavalcanti

Scott S Han

Anne Mae Gaffney

Leonard Edward Bogan, Jr

Daniel Arthur Bors

Michael Bruce Clark, Jr

Donald Lee Zolotorofe

Elsie Mae Vickery

Peter David Klugherz

Ruozhi Song

Sanjay Chaturvedi

Manhua Lin

Daniel J Martenak

Bradley Anson Jacobs

Andrew Michael Lemonds

Frederick William Kaiser

A mixed metal oxide, which may be an orthorhombic phase material, is regenerated, selectively enriched or selectively poisoned as a catalyst to reduce catalyst aging for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contacting said mixed metal oxide with a an oxidizing gas such as oxygen, air, steam and combinations thereof is permitted to flow through the catalyst in a regenerator at a temperature of from 300&#xb0; C. to 600&#xb0; C. to form said regenerated catalyst.

Regeneration of mixed metal oxide catalysts

An orthorhombic phase mixed metal oxide is produced selectively in quantitative yield and used to produce.

Single crystalline phase catalyst

Modified metal oxide catalysts are disclosed which have different chemical, physical and catalytic properties, when used for catalytic conversions of carbon based compounds, as compared to corresponding unmodified metal oxide catalysts. Methods for preparing the modified catalysts are described and their utility in catalytic process is described. Alkenes, unsaturated saturated carboxylic acids, saturated carboxylic acids and their higher analogues are prepared directly from corresponding alkanes, alkenes or alkanes and alkenes utilizing using one or more modified metal oxide catalysts.

Modified catalysts and process

An orthorhombic phase mixed metal oxide is produced selectively in quantitative yield.

A method for producing an unsaturated carboxylic acid comprises: (a) contacting, in a reaction zone, an alkane with a catalyst containing a mixed metal oxide, under conditions which produce a product gas comprising the unsaturated carboxylic acid, unreacted alkane and a product alkene; (b) recovering unreacted alkane and product alkene from the product gas; and (c) recycling the recovered unreacted alkane and product alkene to the reaction zone; wherein the mixed metal oxide consists of a material having the formulaAMNXOwherein A is at least one element selected from the group consisting of molybdenum and tungsten, wherein M is at least one element selected from the group consisting of vanadium, cerium and chromium, wherein N is at least one element selected from the group consisting of tellurium, bismuth and selenium, wherein 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, rubidium, 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, wherein 0.25 &#x3c;a&#x3c;0.98, 0.003&#x3c;m&#x3c;0.5, 0.003&#x3c;n&#x3c;0.5, 0.003&#x3c;x&#x3c;0.5 and o is dependent on the oxidation state of the other elements. An analogous method for the preparation of unsaturated nitrites is also disclosed.

Recycle process

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Lafayette Hill, PA, United States of America

Fernando Antonio Pessoa Cavalcanti