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    • 4. 发明授权
    • Process for preparing aromatic carbonic ester
    • 制备芳香族碳酸酯的方法
    • US5874605A
    • 1999-02-23
    • US465
    • 1998-02-03
    • Hiroshi YoshidaHideaki TsunekiAtusi MoriyaHiroki WakayamaKenichi WatanabeYoshiyuki Onda
    • Hiroshi YoshidaHideaki TsunekiAtusi MoriyaHiroki WakayamaKenichi WatanabeYoshiyuki Onda
    • B01J31/12C07B61/00C07C68/06C07C68/08C07C69/96
    • C07C68/06Y02P20/127
    • An aromatic carbonate ester is continuously and efficiently prepared by the transesterification of an aromatic carboxylate with an aliphatic carbonate ester and/or aromatic.aliphatic carbonate ester. A raw material including an aromatic carboxylate, aliphatic carbonate ester and/or aromatic.aliphatic carbonate ester, and a catalyst are continuously fed to a first stage of a reactive distillation column (1) through a raw material feeding pipe (5). Meanwhile, an aliphatic carbonate ester (a) whose boiling point is lower than that of a reactant liquid that is present in a second stage lower than the first stage is continuously fed to the second stage through an aliphatic carbonate ester (a) feeding pipe (6). The second stage is preferably a column bottom section of the reactive distillation column (1). The amount of aliphatic carbonate ester (a) fed is preferably 0.001 to 5 times, by weight, more than the amount of the raw material fed.
    • PCT No.PCT / JP97 / 02000 Sec。 371日期1998年2月3日 102(e)1998年2月3日PCT 1997年6月10日PCT公布。 WO97 / 47586 PCT公开号 日期1997年12月18日芳族羧酸酯与脂族碳酸酯和/或芳族脂族碳酸酯的酯交换连续有效地制备芳族碳酸酯酯。 包含芳族羧酸酯,脂族碳酸酯和/或芳香族脂肪族碳酸酯的催化剂和催化剂通过原料输送管(5)连续供给至反应蒸馏塔(1)的第一阶段。 同时,通过脂肪族碳酸酯(a)进料管(a)向第二阶段连续供给沸点低于第一阶段的第二阶段的反应液的沸点的脂肪族碳酸酯(a) 6)。 第二阶段优选为反应蒸馏塔(1)的塔底部分。 进料的脂肪族碳酸酯(a)的量优选为进料原料量的0.001〜5倍。