Method for manufacturing diaryl carbonates from dialkyl carbonates

Preparing at least a diaryl carbonate, comprises (a) preparing an alkylene carbonate by reacting an alkylene oxide with carbon dioxide; (b) reacting the alkylene carbonate with at least an alkyl alcohol to obtain at least a dialkyl carbonate and alkylene glycol; (c) separating and reconditioning at...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	MÜLLER, THOMAS ERNST, OOMS, PIETER, GÜRTLER, CHRISTOPH, DORO, FRANCO, RECHNER, JOHANN, RISSE, FRIEDHELM, PROKOFIEVA, ANGELINA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON HETEROCYCLIC COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Preparing at least a diaryl carbonate, comprises (a) preparing an alkylene carbonate by reacting an alkylene oxide with carbon dioxide; (b) reacting the alkylene carbonate with at least an alkyl alcohol to obtain at least a dialkyl carbonate and alkylene glycol; (c) separating and reconditioning at least a portion of the dialkyl carbonate; (d) separating and optionally purifying at least a portion of the dialkyl carbonate; and (e) oxidative carbonylation of at least a portion of separated alkylene glycol with carbon monoxide to alkylene carbonate. Preparing at least a diaryl carbonate from at least a dialkyl carbonate and at least an aryl hydroxy compound, comprises (a) preparing an alkylene carbonate by reacting an alkylene oxide with carbon dioxide; (b) reacting the alkylene carbonate with at least an alkyl alcohol in the presence of a catalyst, and optionally an organic solvent to obtain at least a dialkyl carbonate and alkylene glycol; (c) separating and reconditioning at least a portion of the dialkyl carbonate; (d) separating and optionally purifying at least a portion of the dialkyl carbonate; (e) oxidative carbonylation of at least a portion of separated alkylene glycol with carbon monoxide to alkylene carbonate under the formation of water; (f) separating and optionally purifying least a portion of the alkylene carbonate; (g) recycling at least a portion of the separated alkylene carbonate in the preparation of dialkyl carbonate in the step (b); (h) reacting at least a portion of the dialkyl carbonate with a monophenol to obtain alkyl aryl carbamate and/or diaryl carbonate and alkyl alcohol, where the alkyl alcohol is optionally used in the step (b); (i) disproportionating at least a portion of alkyl aryl carbonate to diaryl carbonate and dialkyl carbonate; and (j) transesterifying at least a portion of the diaryl carbonate with a bisphenol to oligo-/polycarbonate and the monophenol, where the monophenol is optionally used in the step (h). An independent claim is included for a polycarbonate obtained by the above process.