abstract |
An improved process for the preparation of 3,6-dichlorosalicylic acid by carboxylation of potassium 2,5-dichlorophenolate with carbon dioxide in xylene at elevated pressure, where the improvement consists of adding finely powdered, anhydrous potassium carbonate to the reaction mixture, whereby the yield of 3,6-dichloro-salicylic acid is significantly increased. |