Monsanto Technology LLC

Monsanto Company

Peter E Rogers

Jerry R Ebner

Kam-To Wan

Mark A Leiber

Anthony Woods

Eduardo Aurelio Casanova

Eric A Haupfear

Lowell R Smith

William A Scholle

David Z Becher

David R Eaton

Robert B Weisenfeld

Stephen D Prosch

Donald D Soleta

Peng Lei

Chil Y Choi

Gregory A Hartmann

Jingyue Liu

William Poncez

Robert E Byrd

James P Coleman

Raymond C Grabiak

Sherrol L Baysdon

Michael E Seitz

Fuchen Liu

Walter K Gavlick

Mark D Scaia

Alfredo Oba

Bart Roose

Chen-Hsyong Yang

Carl Mumford

Jingye Liu

Oliver Lerch

Leonard Aynardi

John Wagenknecht

Jr Fields

This invention relates to the preparation of N-(phosphonomethyl)glycine ('glyphosate') from N-(phosphonomethyl)iminodiacetic acid ('PMIDA'), and more particularly to methods for control of the conversion of PMIDA, for the identification of reaction end points relating to PMIDA conversion and the preparation of glyphosate products having controlled PMIDA content.

Control of N-(phosphonomethyl)iminodiacetic acid conversion manufacture of glyphosate

The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.

Recovery of phosphorus values and salt impurities from aqueous waste streams

This invention relates to an improved catalyst, comprising a carbon support having a noble metal at its surface, for use in catalyzing liquid phase oxidation reactions, especially in an acidic oxidative environment and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; a process for the preparation of the improved catalyst; a liquid phase oxidation process using such a catalyst wherein the catalyst exhibits improved resistance to noble metal leaching, particularly in acidic oxidative environments and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; and a liquid phase oxidation process in which 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 using such a catalyst wherein the oxidation of the formaldehyde and formic acid by-products into carbon dioxide and water is increased.

Deeply reduced oxidation catalyst and its use in preparing N-(phosphonomethyl) glycine compounds

This invention relates generally to improved methods and herbicidal glyphosate compositions for use in controlling the growth of weeds and unwanted vegetation, and particularly for use in controlling weeds in a crop of transgenic glyphosate-tolerant cotton plants by over-the-top, foliar application of a herbicidal glyphosate formulation.

Mitigating necrosis in transgenic glyphosate-tolerant cotton plants treated with herbicidal glyphosate formulations

Control of N-(phosphonomethyl)iminodiacetic acid conversion in manufacture of glyphosate

This invention relates to an improved catalyst, comprising a carbon support having a noble metal at its surface, for use in catalyzing liquid phase oxidation reactions, especially in an acidic oxidative environment and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; a process for the preparation of the improved catalyst; a liquid phase oxidation process using such a catalyst wherein the catalyst exhibits improved resistance to noble metal leaching, particularly in acidic oxidative environments and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; and a liquid phase oxidation process in which 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 using such a catalyst wherein the oxidation of the formaldehyde and formic acid by-products into carbon dioxide and water is increased.

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., &#x201c;NMG&#x201d;).

Use of a supplemental promoter in conjunction with a carbon-supported noble-metal-containing catalyst in liquid phase oxidation reactions

This invention relates to an improved catalyst, comprising a carbon support having a noble metal at its surface, for use in catalyzing liquid phase oxidation reactions, especially in an acidic oxidative environment and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; a process for the preparation of the improved catalyst; a liquid phase oxidation process using such a catalyst wherein the catalyst exhibits improved resistance to noble metal leaching, particularly in acidic oxidative environments and in the presence of solvents, reactants, intermediates, or products which solubilize noble metals; and a liquid phase oxidation process in which N-(phosphonomethyl)iminodiacetic acid (i.e., &ldquo;PMIDA&rdquo;) or a salt thereof is oxidized to form N-(phosphonomethyl)glycine (i.e., &ldquo;glyphosate&rdquo;) or a salt thereof using such a catalyst wherein the oxidation of the formaldehyde and formic acid by-products into carbon dioxide and water is increased.

Deeply reduced oxidation catalyst and its use for catalyzing liquid phase oxidation reactions

Use of a supplemental promoter in conjunction with a carbon-supported, noble-metal containing catalyst in liquid phase oxidation reactions

A process is disclosed for the preparation of N-phosphonomethylglycine which comprises bringing together under reaction conditions glyoxylic acid or a derivative thereof and an N-acylaminomethylphosphonic acid represented by the formula ##STR1## wherein R is selected from the group consisting of alkyl having from one to about 6 carbon atoms, haloalkyl having from one to about six carbon atoms, benzyl and phenyl.

Process for the preparation of N- phosphonomethylglycine

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Des Peres, MO, United States of America

Peter E Rogers