专利名称：Method for manufacturing diaryl carbonates
and polycarbonates
发明人：OOMS, PIETER,BULAN, ANDREAS申请号：EP11159825.6申请日：20110325公开号：EP2371806A1公开日：20111005
摘要：Preparing diaryl carbonate comprises: (a) preparing phosgene by reactingchlorine (11, 12, 30) with carbon monoxide (10); (b) reacting phosgene with monophenol inpresence of catalyst, and optionally organic solvent; (c) separating and processing diarylcarbonate; (d) separating and purifying hydrogen chloride; (e) preparing aqueous solutionof hydrogen chloride; (f) optionally purifying the aqueous solution; (g) electrochemicallyoxidizing a portion of aqueous hydrogen chloride solution to chlorine to form water; and(h) recycling at least part of produced chlorine into the step (a). Preparing diaryl
carbonate comprises: (a) preparing phosgene by reacting chlorine (11, 12, 30) with carbonmonoxide (10); (b) reacting the phosgene with at least one monophenol in the presenceof a catalyst, and optionally an organic solvent to form diaryl carbonate and hydrogenchloride; (c) separating and processing the diaryl carbonate; (d) separating and optionalpurifying the hydrogen chloride formed; (e) preparing an aqueous solution of hydrogenchloride; (f) optionally purifying the aqueous solution of hydrogen chloride; (g)
electrochemically oxidizing at least a portion of the aqueous hydrogen chloride solutionto chlorine under the formation of water; and (h) recycling at least part of producedchlorine in the step (a), where the step (g) is carried out using a gas diffusion electrode as
oxygen depolarized cathode.
申请人：BAYER MATERIALSCIENCE AG
地址：51368 Leverkusen DE
国籍：DE
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