发明授权
US3954840A 1,3,5,7-Naphthalenetetracarboxylic acids and process for preparation thereof 失效
1,3,5,7-萘四羧酸及其制备方法

1,3,5,7-Naphthalenetetracarboxylic acids and process for preparation
thereof
摘要:
A novel 1,3,5,7-naphthalenetetracarboxylic acid, an alkali salt thereof, or an ester thereof, and a novel process for preparation thereof, and method of effective purification thereof.
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