Method of manufacturing alkali metal salt of 2,3,6,7-naphthalene

Details Method of manufacturing alkali metal salt of 2,3,6,7-naphthalene Method of manufacturing alkali metal salt of 2,3,6,7-naphthalene

1989-08-31

1990-07-17

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

562423, 562482, 562483, 562486, 562488, C07C 5102, C07C 51347, C07C 51353

Patent

active

049422570

ABSTRACT:
A method of manufacturing an alkali metal salt of 2,3,6,7-naphthalenetetracarboxylic acid. Either a sodium salt or a mixture of sodium salt and potassium salt of at least one naphthalenecarboxylic acid selected form the group consisting of naphthoic acids and naphthalenepolycarboxylic acids is heated to an elevated temperature in an inert gas atmosphere in the presence of a Henkel reaction catalyst and halogenated sodium.

REFERENCES:
patent: 4820868 (1989-04-01), Mitamura et al.
Dozen et al., Thermochim. Acta, 25, pp. 209 to 216 (1978).

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