USE OF A SUPPLEMENTAL PROMOTER IN CONJUNCTION WITH A CARBON-SUPPORTED, NOBLE-METAL-CONTAINING CATALYST IN LIQUID PHASE OXIDATION REACTIONS

WIPO Patent Application WO2001046208

A3

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, a process for making of an improved catalyst comprising such a supplemental promoter, and an improved catalyst comprising such a supplemental promoter. 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 increased 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").

LEIBER MARK A (US)
EBNER JERRY R (US)
WAN KAM-TO (US)
WOODS ANTHONY (GB)
ROGERS PETER E (US)

PCT/US2000/034875

January 03, 2002

December 21, 2000

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MONSANTO TECHNOLOGY LLC (US)
LEIBER MARK A (US)
EBNER JERRY R (US)
WAN KAM TO (US)
WOODS ANTHONY (GB)
ROGERS PETER E (US)

A01N57/20; B01J23/56; C07B61/00; C07F9/38; B01J21/18; B01J37/02; (IPC1-7): C07F9/38

WO2000009517A2	2000-02-24
WO1999043430A1	1999-09-02

EP1067108A2	2001-01-10
GB1601715A	1981-11-04
US4351962A	1982-09-28
DE19600741A1	1996-07-25
US5500485A	1996-03-19

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