Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hiroshi Ogawa0
Shinichi Nagao0
Date of Patent
May 19, 2009
0Patent Application Number
109657700
Date Filed
October 18, 2004
0Patent Primary Examiner
Patent abstract
A process for producing pyromellitic acid which comprises step A for oxidizing durene, thereby obtaining a reaction mixture comprising trimethyl benzoic acid, trimethyl benzyl alcohol and trimethyl benzaldehyde, step B for separating trimethyl benzoic acid, trimethyl benzaldehyde and trimethyl benzyl alcohol from the reaction mixture obtained in step A, and step C for oxidizing trimethyl benzoic acid and/or trimethyl benzaldehyde separated in step B, thereby obtaining pyromellitic acid.
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