专利名称：Method for manufacturing diaryl carbonates
from dialkyl carbonates
发明人：GÜRTLER, CHRISTOPH,MÜLLER, THOMAS
ERNST,OOMS, PIETER,RISSE,
FRIEDHELM,RECHNER, JOHANN,DORO,FRANCO,PROKOFIEVA, ANGELINA
申请号：EP11183820.7申请日：20111004公开号：EP2457891B1公开日：20150401
摘要：Preparing at least a diaryl carbonate, comprises (a) preparing an alkylenecarbonate by reacting an alkylene oxide with carbon dioxide; (b) reacting the alkylenecarbonate with at least an alkyl alcohol to obtain at least a dialkyl carbonate andalkylene glycol; (c) separating and reconditioning at least a portion of the dialkylcarbonate; (d) separating and optionally purifying at least a portion of the dialkylcarbonate; and (e) oxidative carbonylation of at least a portion of separated alkyleneglycol with carbon monoxide to alkylene carbonate. Preparing at least a diaryl carbonatefrom 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 acatalyst, and optionally an organic solvent to obtain at least a dialkyl carbonate andalkylene glycol; (c) separating and reconditioning at least a portion of the dialkylcarbonate; (d) separating and optionally purifying at least a portion of the dialkyl
carbonate; (e) oxidative carbonylation of at least a portion of separated alkylene glycolwith carbon monoxide to alkylene carbonate under the formation of water; (f) separatingand optionally purifying least a portion of the alkylene carbonate; (g) recycling at least aportion of the separated alkylene carbonate in the preparation of dialkyl carbonate inthe step (b); (h) reacting at least a portion of the dialkyl carbonate with a monophenol toobtain alkyl aryl carbamate and/or diaryl carbonate and alkyl alcohol, where the alkylalcohol is optionally used in the step (b); (i) disproportionating at least a portion of alkylaryl carbonate to diaryl carbonate and dialkyl carbonate; and (j) transesterifying at least aportion of the diaryl carbonate with a bisphenol to oligo-/polycarbonate and themonophenol, where the monophenol is optionally used in the step (h). An independentclaim is included for a polycarbonate obtained by the above process.
申请人：BAYER INTELLECTUAL PROPERTY GMBH,BAYER IP GMBH,BAYERINTELLECTUAL PROPERTY GMBH
地址：DE
国籍：DE
代理机构：BIP Patents
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