Process for the preparation of...

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C - Chemistry, Metallurgy

07

C

C07C 65/11 (2006.01) C07C 51/10 (2006.01) C07C 51/15 (2006.01) C07C 51/38 (2006.01)

Patent

CA 2124058

Abstract Process for the preparation of 2-hydroxynaphthalene-6- carboxylic acid A process for the preparation of 2-hydroxynaphthalene-6- carboxylic acid using potassium carbonate and CO at temperatures above 260°C and at a pressure of at least 10 bar comprises using 2-hydroxynaphthalene-3-carboxylic acid and/or 2-hydroxynaphthalene-3,6-dicarboxylic acid and/or their potassium salts and, if desired, potassium .beta.-naphtholate as starting materials. The process according to the invention enables a con- siderable inerease, by reusing the secondary products, in the product selectivity with regard to 2-hydroxy- naphthalene-6-carboxylic acid.

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