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:
Oct. 03, 1989
Filed:
Oct. 20, 1988
Vincent S Smentkowski, Pittsburgh, PA (US);
Patrick L Hagans, Midland, MI (US);
John T Yates, Jr, Allison Park, PA (US);
University of Pittsburgh of the Commonwealth System of Higher Education, Pittsburgh, PA (US);
Abstract
A method of catalytic oxidation of organophosphonate esters includes introducing the organophosphonate esters in gaseous form into contact with a molybdenum catalyst and effecting such introduction in the presence of oxygen to cause the organophosphonate ester to be oxidized on the molybdenum catalyst surface. The process is preferably carried out at a temperature of at least 900.degree. K. in the presence of excess oxygen. A chemisorbed oxide coating or molybdenum oxide coating or both may be established on all or part of the molybdenum catalyst. Among the organophosphonate esters which may be oxidized in this manner are dimethyl methylphosphonate, diisopropyl methylphosphonate, diphenyl methylphosphonate, and other molecules with the structure: ##STR1## The catalytic oxidation results in emission of carbon monoxide and phosphorus oxides(s) without undesired buildup of carbonaceous or phosphorus overlayers on the Mo catalyst surface.