Method for production of 2-hydroxynaphthalene-6-carboxylic acid

Details Method for production of 2-hydroxynaphthalene-6-carboxylic acid Method for production of 2-hydroxynaphthalene-6-carboxylic acid

C - Chemistry, Metallurgy

07

C

260/508.3

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

Patent

CA 1299192

- 1 - Abstract The present invention is directed to a method of manufacturing 2-hydroxynaphthalene-6-carboxylic acid wherein .beta.-naphtholpotassium and carbon dioxide, in the presence of a reaction medium that substantially does not dissolve the .beta.-naphtholpotassium under heat and pressure, are reacted with the simultaneous transference of .beta.-naphthol produced and water existing in a reaction system to a vapor phase and elimination thereof from the reaction system. The method of the present invention results in improved yields and selective ratio of the 2-hydroxynaphthalene-6-carboxylic acid.

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