Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus acids or salts thereof
Reexamination Certificate
2006-06-27
2006-06-27
Maier, Leigh C. (Department: 1623)
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus acids or salts thereof
C502S174000, C502S180000, C502S182000, C502S183000, C502S184000
Reexamination Certificate
active
07067693
ABSTRACT:
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.
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Ebner Jerry R.
Leiber Mark A.
Liu Jingye
Rogers Peter E.
Scholle William A.
Maier Leigh C.
Monsanto Technology LLC
Schaper Joseph A.
Senniger Powers
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