Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof
Reexamination Certificate
2008-06-12
2011-12-20
Katakam, Sudhakar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acids and salts thereof
C562S405000, C562S407000, C562S409000, C562S417000
Reexamination Certificate
active
08080685
ABSTRACT:
A method for producing benzoic acid or a methylbenzoic acid isomer is disclosed which comprises forming a dispersion comprising oxygen-containing gas bubbles dispersed in either toluene or an xylene isomer, wherein the bubbles have a mean diameter less than 1 micron. The dispersion is then subjected to reaction conditions comprising a pressure of less than about 1013 kPa and a temperature of less than about 160° C., whereby at least a portion of the toluene or xylene isomer is partially oxidized to form benzoic acid or the corresponding methylbenzoic acid isomer, respectively. In some embodiments, the methylbenzoic acid isomer is an intermediate compound, and the method further includes subjecting any unreacted xylene isomer and the intermediate compound to further oxidization, to form 1,2-benzenedicarboxylic acid, 1,3-benzenedicarboxylic acid, or 1,4-benzenedicarboxylic acid. A system of apparatus for performing the method is also disclosed.
REFERENCES:
patent: 5009816 (1991-04-01), Weise et al.
patent: 5371283 (1994-12-01), Kingsley et al.
patent: 5451348 (1995-09-01), Kingsley et al.
patent: 5877350 (1999-03-01), Langer et al.
patent: 6241472 (2001-06-01), Bosch et al.
patent: 6368366 (2002-04-01), Langer et al.
patent: 6368367 (2002-04-01), Langer et al.
patent: 6383237 (2002-05-01), Langer et al.
patent: 6866411 (2005-03-01), Stelzer et al.
patent: 2002/0010364 (2002-01-01), Braithwaite et al.
patent: 2003/0043690 (2003-03-01), Holl
patent: 2004/0052158 (2004-03-01), Holl
patent: 2005/0033069 (2005-02-01), Holl et al.
patent: 2006/0047159 (2006-03-01), Wonders et al.
patent: 2008/0144431 (2008-06-01), Troxler
patent: 1020020004001 (2002-01-01), None
Anthony Rayford G.
Bagherzadeh Ebrahim
Borsinger Gregory
Hassan Abbas
Hassan Aziz
H R D Corporation
Katakam Sudhakar
Porter Hedges LLP
Westby Timothy S.
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