Oxidation of alkyl aromatic compounds to aromatic acids in...

Details Oxidation of alkyl aromatic compounds to aromatic acids in... Oxidation of alkyl aromatic compounds to aromatic acids in...

C - Chemistry, Metallurgy

07

C

C07C 51/265 (2006.01) C07C 63/26 (2006.01) C07C 63/38 (2006.01)

Patent

CA 2395804

The present invention pertains to an improved method of oxidizing substituted aromatic compounds (such as p xylene) to their corresponding aromatic acids (such as terephthalic acid). The improvement involves carrying out the oxidation reaction in an aqueous medium, wherein the aqueous medium contains at least 30 percent water, preferably up to 30 percent surfactant and preferably a low molecular weight material containing a hydrophilic end group as a co-surfactant. The reaction is carried out at a pH of less than 3Ø

L'invention concerne un procédé amélioré conçu pour oxyder des composés aromatiques substitués (par exemple p xylène) en acides aromatiques correspondants (par exemple acide téréphtalique). L'amélioration consiste à procéder à une réaction d'oxydation dans un milieu aqueux. Ce dernier contient au moins 30 % d'eau, de préférence jusqu'à 30 % de tensioactif et de préférence une substance de faible poids moléculaire renfermant un groupe terminal hydrophyle comme co-tensioactif, le pH pendant la réaction n'excédant pas 3,0.

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