Process for the continuous preparation of perylenetetracarboxylic diimides
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United States of America Patent
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Sep 21, 1993
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app pub date -
Jul 30, 1991
filing date -
Jul 30, 1991
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Abstract
This invention relates to a novel process for the continuous preparation of perylenetetracarboxylic diimides by fusion of a naphthalimide in a mixture of an alkali metal hydroxide and, optionally, an alkali metal carboxylate to form an initial leuko condensation product that is subsequently oxidized in an aqueous medium to form the perylenetetracarboxylic diimide.
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