Process for the preparation of 3,6-dichloro-salicyclic
AssigneeCelamerck GmbH & Co. KG
InventorsManfred Becher, Richard Sehring
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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.
Claims3
The method of increasing the yield of 3,6-dichloro-salicylic acid in a process comprising carboxylating potassium 2,5-dichloro-phenolate with carbon dioxide in xylene at elevated pressure, which consist of adding an effective yield-increasing amount of finely powdered, anhydrous potassium carbonate to the carboxylation reaction mixture.
Dependencies are inferred from the claim text.