Process for preparation of naphthalene-2,6-dicarboxylic acid dia

Details Process for preparation of naphthalene-2,6-dicarboxylic acid dia Process for preparation of naphthalene-2,6-dicarboxylic acid dia

1986-09-29

1989-04-11

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

562423, 562481, 562488, C07C 51353

Patent

active

048208680

ABSTRACT:
Disclosed is a process for the preparation of a naphthalene-2,6-dicarboxylic acid dialkali metal salt which comprises heating an alkali metal salt of naphthoic acid and/or a dialkali metal salt of naphthalene-dicarboxylic acid under pressure with carbon dioxide gas in the presence of a catalyst, wherein an aprotic polycyclic aromatic compound having 2 or 3 rings is used as a reaction medium. Naphthalene-2,6-dicarboxylic acid dialkali metal salt can be obtained in high yield and selectivity with a good reproducibility of the reaction.

REFERENCES:
patent: 2823231 (1958-02-01), Raecke et al.
patent: 3043846 (1962-04-01), Blaser et al.
patent: 3487106 (1969-12-01), Patton et al.
patent: 3641130 (1972-02-01), Kuper
patent: 3781341 (1973-12-01), Wu et al.

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