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US 4,559,176 AGranted
Process for the production of benzanthrone
AssigneeCiba-Geigy Corporation
InventorsMartin Burli, Jacques Bersier, Eric Plattner, Hans-Ulrich Herrmann
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Abstract
The invention describes a process for the production of benzanthrone by reacting anthraquinone with glycerol and/or acrolein, using anthrone as reducing agent. Benzanthrone is an important intermediate for dyes and is used in particular for the preparation of vat dyes.
Claims6
A process for the production of benzanthrone by reacting anthraquinone with glycerol and/or acrolein in the presence of a reducing agent, in concentrated sulfuric acid as reaction medium, wherein anthrone is used as reducing agent.
Dependencies are inferred from the claim text.