The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Sep. 25, 2001
Leonard Edward Bogan, Jr., Hatfield, PA (US);
Daniel A. Bors, Maple Glen, PA (US);
Fernando Antonio Pessoa Cavalcanti, Lafayette Hill, PA (US);
Scott Han, Lawrenceville, NJ (US);
Bradley Anson Jacobs, Chalfont, PA (US);
Frederick William Kaiser, Fort Washington, PA (US);
Peter David Klugherz, Huntingdon Valley, PA (US);
Manhua Lin, Maple Glen, PA (US);
Donald Lee Zolotorofe, Ivyland, PA (US);
Leonard Edward Bogan, Jr., Hatfield, PA (US);
Daniel A. Bors, Maple Glen, PA (US);
Fernando Antonio Pessoa Cavalcanti, Lafayette Hill, PA (US);
Scott Han, Lawrenceville, NJ (US);
Bradley Anson Jacobs, Chalfont, PA (US);
Frederick William Kaiser, Fort Washington, PA (US);
Peter David Klugherz, Huntingdon Valley, PA (US);
Manhua Lin, Maple Glen, PA (US);
Donald Lee Zolotorofe, Ivyland, PA (US);
Rohm and Haas Company, Philadelphia, PA (US);
Abstract
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 <a<0.98, 0.003<m<0.5, 0.003<n<0.5, 0.003<x<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.