Process for the preparation of aromatic hydroxy carboxylic...

Details Process for the preparation of aromatic hydroxy carboxylic... Process for the preparation of aromatic hydroxy carboxylic...

C - Chemistry, Metallurgy

07

C

C07C 65/01 (2006.01) C07C 51/10 (2006.01) C07C 51/15 (2006.01)

Patent

CA 2124063

Abstract Process for the preparation of aromatic hydroxy carboxylic acids A process for the preparation of aromatic hydroxy car- boxylic acids by reacting alkali metal phenolates or alkali metal naphtholates with alkali metal carbonates and carbon monoxide, with susequent acidification, wherein the solid starting materials - alkali metal carbonate and/or alkali metal phenolate or naphtholate - are metered into the reaction mixture in the form of one or more dispersions in an inert organic liquid . The process according to the invention enables the preparation of aromatic hydroxy carboxylic acids in good yields and with high chemical selectivity. Additional measures for increasing the selectivity, as described for example for the Kolbe-Schmitt reaction in EP-A 0 053 824, EP-A 0 081 753 and EP-A 0 254 596, and for the reaction with CO and carbonate in, for example, WO 91/11422, are unnecessary.

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