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US 2013/0172624 A1Published application
Process for the oxidation of alkylaromatic hydrocarbons catalyzed by n-hydroxy derivatives
AssigneeVersalis S.P.A.
InventorsFrancesco Recupero, Carlo Punta, Lucio Melone, Simona Prosperini, Nadia Pastori
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Abstract
Process for the oxidation of alkylaromatic hydrocarbons to hydroperoxide catalyzed by N-hydroxy derivatives in the presence of a solvent which includes recovering the catalyst from the oxidation mixture by the possible removal of the solvent by distillation and/or cooling of the oxidation mixture, with the consequent precipitation and filtration of the N-hydroxy-derivative catalyst, and adsorption with non-basic adsorbing solids for the substantially complete recovery of the catalyst.
Claims24
A process for oxidizing an alkylaromatic compound, the process comprising:
- the selectively aerobically oxidizing of a C8-C50 alkylaromatic hydrocarbon to form a hydroperoxide, said oxidation catalyzed by at least one N-hydroxy derivative in the presence of at least one polar solvent and optionally water as a co-solvent;
- recovering the at least one N-hydroxy derivative from an oxidation mixture, and optionally removing solvent by distillation, cooling, or both, from the oxidation mixture, with precipitation and filtration of the N-hydroxy-derivative;
- and
- optionally splitting the hydroperoxide with at least one acid catalyst to form phenol and a carbonyl compound;
- wherein the oxidation mixture, optionally concentrated, cooled and filtered, is treated with at least one non-basic adsorbing solid to complete recovery of the N-hydroxy derivative.
2 more elements
Dependencies are inferred from the claim text.