公开(公告)号：US20070203373A1

公开(公告)日：2007-08-30

申请号：US11678009

申请日：2007-02-22

申请人： Evert Van Der Heide ,  Cornelis Vrouwenvelder

发明人： Evert Van Der Heide ,  Cornelis Vrouwenvelder

IPC分类号： C07C29/10

CPC分类号： C07C29/12 ,  C07C68/065 ,  C07C31/202 ,  C07C31/205 ,  C07C69/96

摘要： The invention provides a process for the preparation of alkanediol comprising the steps: (i) contacting alkylene oxide with carbon dioxide in the presence of a carbonation catalyst to obtain a reaction mixture containing alkylene carbonate at a reaction temperature of from 100 to 200° C.; (ii) contacting the reaction mixture obtained in step (i) with R—OH, in which R is hydrogen or an alkyl group in the presence of a catalyst to obtain a second reaction mixture containing alkanediol and R2CO3; (iii) subjecting the second reaction mixture containing alkanediol and R2CO3 to a separation step to yield a crude alkanediol stream, which is subjected to distillation to yield a purified stream of alkanediol as the bottom stream; (iv) subjecting the purified stream of alkanediol obtained in step (iii) to further distillation to obtain a second bottom stream containing a mixture of alkanediol, heavy components, and optionally carbonation catalyst, and a top stream containing high purity alkanediol; wherein at least part of the reaction mixture obtained in step (i) is used for heat exchange with at least part of the crude alkanediol stream and/or with at least part of the purified alkanediol stream.

摘要翻译： 本发明提供一种制备链烷二醇的方法，包括以下步骤：（i）在碳酸化催化剂存在下使环氧烷与二氧化碳接触，得到反应温度为100-200℃的含有碳酸亚烷基酯的反应混合物 ; （ii）在催化剂存在下使步骤（i）中获得的反应混合物与R-OH（其中R是氢或烷基）接触，得到含有链烷二醇和R 2的第二反应混合物 > CO 3 3; （iii）将含有链烷二醇和R 2 CO 3的第二反应混合物进行分离步骤以产生粗链烷二醇流，将其进行蒸馏以产生纯化的流 的链烷二醇作为底部流; （iv）使步骤（iii）中获得的纯化的烷烃二醇进一步蒸馏，得到含有链烷二醇，重组分和任选碳酸化催化剂的混合物的第二塔底料流和含有高纯度链烷二醇的顶流; 其中步骤（i）中获得的至少部分反应混合物用于与至少部分粗链烷二醇流和/或至少部分纯化的链烷二醇流进行热交换。