Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus acids or salts thereof
Reexamination Certificate
2005-08-09
2005-08-09
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus acids or salts thereof
Reexamination Certificate
active
06927304
ABSTRACT:
A treatment for de-oxygenating a noble metal on carbon catalyst used in liquid phase oxidation reactions which includes exposing the catalyst to a non-oxidizing environment. The de-oxygenation treatment improves catalyst performance and is particularly suited for noble metal on carbon catalysts used to catalyze the oxidative cleavage of a carboxymethyl substituent from an N-(phosphonomethyl)iminodiacetic acid substrate in an aqueous reaction mixture using an oxygen-containing gas to produce an N-(phosphonomethyl)glycine product. In one embodiment, the catalyst is exposed to a non-oxidizing environment by introducing a non-oxidizing gas and/or reducing gas into a slurry comprising the catalyst in contact with a liquid medium.
REFERENCES:
patent: 3950402 (1976-04-01), Franz
patent: 3969398 (1976-07-01), Hershman
patent: 4582650 (1986-04-01), Felthouse
patent: 4624937 (1986-11-01), Chou
patent: 4696772 (1987-09-01), Chou
patent: 5179228 (1993-01-01), Ramon et al.
patent: 5606107 (1997-02-01), Smith
patent: 6005140 (1999-12-01), Morgenstern et al.
patent: 6232494 (2001-05-01), Morgenstern et al.
patent: 6239312 (2001-05-01), Villanti et al.
patent: 6417133 (2002-07-01), Ebner et al.
patent: 2002/0016503 (2002-02-01), Leiber et al.
patent: 2002/0068836 (2002-06-01), Haupfear et al.
patent: WO 99/52630 (1999-10-01), None
Franz et al., “Glyphosate: A Unique Global Herbicide”, ACS Monograph 189, 1997, pp. 233-263, American Chemical Society, Washington D.C.
Monsanto Technology LLC
Schaper Joseph A.
Senniger Powers
Zucker Paul A.
LandOfFree
De-oxygenation treatment for noble metal on carbon catalysts... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with De-oxygenation treatment for noble metal on carbon catalysts..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and De-oxygenation treatment for noble metal on carbon catalysts... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3490247