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:
Nov. 08, 2005
Filed:
May. 01, 2003
Mark A. Leiber, St. Peters, MO (US);
Jerry R. Ebner, St. Charles, MO (US);
Kam-to Wan, Manchester, MO (US);
Anthony Woods, Cambridge, GB;
Peter Rogers, Des Peres, MO (US);
Mark A. Leiber, St. Peters, MO (US);
Jerry R. Ebner, St. Charles, MO (US);
Kam-To Wan, Manchester, MO (US);
Anthony Woods, Cambridge, GB;
Peter Rogers, Des Peres, MO (US);
Monsanto Technology LLC, St. Louis, MO (US);
Abstract
This invention relates to the use of a supplemental promoter in conjunction with a noble-metal-containing catalyst comprising a carbon support in catalyzing liquid phase oxidation reactions. In a particularly preferred embodiment, a supplemental promoter (most preferably bismuth or tellurium) is used in conjunction with a noble-metal-containing catalyst comprising a carbon support in a liquid phase oxidation process wherein N-(phosphonomethyl) iminodiacetic acid (i.e., 'PMIDA') or a salt thereof is oxidized to form N-(phosphonomethyl)glycine (i.e., 'glyphosate') or a salt thereof. The benefits of such a process include oxidation of the formaldehyde and formic acid by-products, and, consequently, decreased final concentrations of those by-products as well as other undesirable by-products, most notably N-methyl-N-(phosphonomethyl)glycine (i.e., “NMG”).