C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 63/38 (2006.01) C07C 51/265 (2006.01) C07F 15/06 (2006.01)
Patent
CA 2098485
Provided is a continuous process for producing 2,6-naphthalenedicarboxylic acid by the liquid phase oxidation of 2,6-dimethylnaphthalene comprising continuously adding to a reaction zone the oxidation reaction components comprising 2,6-dimethylnaphthalene, a source of molecular oxygen, a solvent comprising an aliphatic monocarboxylic acid, and a catalyst comprising cobalt, manganese and bromine components, wherein the atom ratio of manganese to cobalt is about 5:1 to about 0.3:1, the total of cobalt and manganese is at least about 0.40 weight percent based on the weight of solvent, and maintaining the contents of the reaction zone at a temperature of about 370 ° F to about 420 °F and at a pressure sufficient to maintain at least a portion of the monocarboxylic acid in the liquid phase thereby oxidizing the 2,6-dimethylnaphthalene to 2,6-naphthalenedicarboxylic acid. By operating according to the process of this invention, 2,6- naphthalenedicarboxylic acid can be continuously produced in high yield and with low levels of impurities.
Harper Jon J.
Kuhlmann George E.
Larson Keith D.
Mcmahon Rosemary F.
Sanchez Paul A.
Amoco Corporation
Bp Corporation North America Inc.
Gowling Lafleur Henderson Llp
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