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1. EP2586767 - Procédé de fabrication de diarylcarbonates et de polycarbonates

Office Office européen des brevets (OEB)
Numéro de la demande 11186487
Date de la demande 25.10.2011
Numéro de publication 2586767
Date de publication 01.05.2013
Type de publication A1
CIB
C07C 68/02
CCHIMIE; MÉTALLURGIE
07CHIMIE ORGANIQUE
CCOMPOSÉS ACYCLIQUES OU CARBOCYCLIQUES
68Préparation des esters de l'acide carbonique ou de l'acide formique halogéné
02à partir du phosgène ou de formiates halogénés
CPC
C07C 68/02
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
68Preparation of esters of carbonic or haloformic acids
02from phosgene or haloformates
C25B 1/26
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
1Electrolytic production of inorganic compounds or non-metals
24of halogens or compounds thereof
26Chlorine; Compounds thereof
Y02P 20/584
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
20Technologies relating to chemical industry
50Improvements relating to the production of products other than chlorine, adipic acid, caprolactam, or chlorodifluoromethane, e.g. bulk or fine chemicals or pharmaceuticals
58Recycling
584of catalysts
Déposants BAYER MATERIALSCIENCE AG
Inventeurs OOMS PIETER DR
Données relatives à la priorité 11186487 25.10.2011 EP
Titre
(DE) Verfahren zur Herstellung von Diarylcarbonaten und Polycarbonaten
(EN) Method for manufacturing diaryl carbonates and polycarbonates
(FR) Procédé de fabrication de diarylcarbonates et de polycarbonates
Abrégé
(DE)
Die vorliegende Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von Diarylcarbonaten aus Phosgen und wenigstens einer Monohydroxyverbindung (Monophenol) in Gegenwart von Katalysa-toren, sowie deren Verwendung zur Herstellung von Polycarbonaten. Der dabei anfallende Chlor-wasserstoff wird durch elektrochemische oder thermische Oxidation zu Chlor umgesetzt, wobei das Chlor zur Herstellung des Phosgens rückgeführt wird. Insbesondere besteht das Verfahren in der Wiederverwendung des Katalysators für das Diphenylcarbonat-Herstellungsverfahren (DPC-Verfahren).

(EN)
Preparing diaryl carbonate comprises (a) preparing phosgene by reacting chlorine with carbon monoxide, (b) reacting the obtained phosgene with at least one monophenol in the presence of a metal catalyst and optionally an organic solvent to form at least one diaryl carbonate and hydrogen chloride, (c) separating and processing diaryl carbonate and (d) recycling heavy volatile metal containing catalyst fraction into the step (b). Preparing diaryl carbonate comprises (a) preparing phosgene by reacting chlorine with carbon monoxide, (b) reacting the obtained phosgene with at least one monophenol in the presence of a metal catalyst and optionally an organic solvent to form at least one diaryl carbonate and hydrogen chloride, (c) separating and processing diaryl carbonate, (d) recycling heavy volatile metal containing catalyst fraction into the step (b), (e) separating and optionally purifying hydrogen chloride, (f) electrochemically or thermally oxidizing at least a part of hydrogen chloride to chlorine and (g) recycling at least one part of chlorine into the step (a), where optionally the metal containing catalyst fraction before recycling is reacted with chlorinating agents e.g. phosgene, chloroformic acid phenyl ester or hydrogen chloride and purified.