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    • 31. 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。
    • 33. 发明授权
    • Process for preparing carbonate esters
    • 制备碳酸酯的方法
    • US5543546A
    • 1996-08-06
    • US443753
    • 1995-05-18
    • Hideaki TsunekiYoshiyuki OndaAtusi MoriyaHiroshi Yoshida
    • Hideaki TsunekiYoshiyuki OndaAtusi MoriyaHiroshi Yoshida
    • B01D3/00B01J19/18C07C68/06
    • C07C67/03B01D3/009B01J19/1862C07C68/06B01J2219/00029B01J2219/00094Y02P20/127
    • Carboxylate (1) of the formula R.sup.1 COOR.sup.2 (where each of R.sup.1 and R.sup.2 independently represents an alkyl group, an alicyclic hydrocarbon group or an aryl alkyl group), an aromatic hydroxy compound of the formula R.sup.3 OH (where R.sup.3 represents an aromatic group with or without a substituent), and a catalyst are supplied to a batch reactor 1, and a transesterification between the carboxylate (1) and the aromatic hydroxy compound is performed to produce carboxylate (3) of the formula R.sup.1 COOR.sup.3 (where R.sup.1 and R.sup.3 are as defined above). After distilling off the by-produced alcohol and unreacted compounds using a distillation column 2, carbonate ester (4) of the formula R.sup.4 O--COOR.sup.5 (where each of R.sup.4 and R.sup.5 independently represents an alkyl group, an alicyclic hydrocarbon group or an aryl alkyl group) is supplied to the batch reactor 1. Then, a transesterification between the carboxylate (3) and the carbonate ester (4) is performed to produce carbonate ester (5) of the formula R.sup.3 O--COOR.sup.6 (where R.sup.3 is as defined above, and R.sup.6 is a substituent selected from the group consisting of R.sup.3, R.sup.4 and R.sup.5). This process enables efficient preparation of carbonate esters.
    • 式R1COOR2的羧酸酯(1)(其中R 1和R 2各自独立地表示烷基,脂环族烃基或芳基烷基),式R 3 OH的芳族羟基化合物(其中R 3表示具有或不具有 取代基),将催化剂供给到间歇式反应器1中,并进行羧酸酯(1)与芳族羟基化合物之间的酯交换反应,生成式R 1 COOR 3的羧酸酯(3)(其中R 1和R 3如上所定义) )。 使用蒸馏塔2蒸馏出副产物醇和未反应化合物后,式R4O-COOR5(其中R4和R5各自独立地表示烷基,脂环族烃基或芳基烷基)的式(4) )供给到间歇反应器1.然后,进行羧酸酯(3)和碳酸酯(4)之间的酯交换以制备式R3O-COOR6的碳酸酯(5)(其中R3如上定义,和 R6是选自R3,R4和R5的取代基)。 该方法可有效制备碳酸酯。