公开(公告)号：EP1174406A1

公开(公告)日：2002-01-23

申请号：EP00906676.2

申请日：2000-03-03

申请人： Asahi Kasei Kabushiki Kaisha

发明人： TOJO, Masahiro Asahi Kasei Ootaka ,  OONISHI, Kazuhiro

IPC分类号： C07C27/00 ,  C07C27/28

CPC分类号： C07C41/16 ,  C07C29/1285 ,  C07C68/065 ,  C07C69/96 ,  C07C43/11 ,  C07C31/20 ,  C07C31/202 ,  C07C31/205 ,  C07C31/207

摘要： A method for continuously producing a dialkyl carbonate and a diol, comprising: (1) continuously feeding a cyclic carbonate and an aliphatic monohydric alcohol to a continuous multi-stage distillation column, and continuously effecting a transesterification between the cyclic carbonate and the aliphatic monohydric alcohol in the presence of a transesterification catalyst in the distillation column, while continuously withdrawing a low boiling point mixture in a gaseous form containing the produced dialkyl carbonate and the unreacted aliphatic monohydric alcohol from an upper portion of the distillation column and continuously withdrawing a high boiling point mixture in a liquid form containing the produced diol and the unreacted cyclic carbonate from a lower portion of the distillation column, and (2) continuously feeding the high boiling point mixture withdrawn from the lower portion of the distillation column to a continuous etherification reactor, to thereby effect a continuous etherification reaction between the unreacted cyclic carbonate and a part of the produced diol and produce a chain ether and carbon dioxide, while continuously withdrawing the resultant etherification reaction mixture containing the remainder of the diol produced in step (1) and the produced chain ether from the continuous etherification reactor, wherein the etherification reaction mixture has a cyclic carbonate content of from 0 to 10 -2 in terms of the weight ratio of the cyclic carbonate to the diol.

摘要翻译： 一种连续生产碳酸二烷基酯和二醇的方法，包括：（1）连续将环状碳酸酯和脂族一元醇进料到连续多级蒸馏塔中，连续进行环状碳酸酯与脂肪族一元醇的酯交换反应 在蒸馏塔中存在酯交换催化剂的同时，从蒸馏塔的上部连续取出含有生成的碳酸二烷基酯和未反应的脂肪族一元醇的气态的低沸点混合物，并连续地抽出高沸点 含有生成的二醇的液体形式的混合物和来自蒸馏塔下部的未反应的环状碳酸酯，和（2）将从蒸馏塔的下部排出的高沸点混合物连续供给至连续醚化反应器， 从而实现连续的等级 在未反应的环状碳酸酯和一部分所生成的二醇之间进行裂解反应，并产生链状醚和二氧化碳，同时连续地将所得到的醚化反应混合物从步骤（1）中产生的剩余的二醇和所产生的链醚从 连续醚化反应器，其中醚化反应混合物的环状碳酸酯含量以环状碳酸酯与二醇的重量比计为0至10 -2。