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US 4,304,724 AGranted
Process for the manufacture of anthraquinone
AssigneeThe Dow Chemical Company
InventorMichael O. Nutt
Life of this patent
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Abstract
The present invention provides a process for making anthraquinone by the cyclization reaction of orthobenzoylbenzoic acid. The process uses as a catalyst a cation-exchange resin formed from a polymer with a polytetrafluoroethylene backbone and sulfonic-acid sidechains.
Claims7
A process for making of anthraquinone, comprising the step of contacting a solution of ortho-benzoylbenzoic acid in an inert solvent with a perfluorinated cation-exchange resin, in the acid form, at a temperature
Dependencies are inferred from the claim text.