[EN] PURIFICATION OF 1,3-PROPANEDIOL BY DISTILLATION<br/>[FR] PURIFICATION DE 1,3-PROPANEDIOL PAR DISTILLATION
申请人:SHELL INT RESEARCH
公开号:WO2004076392A1
公开(公告)日:2004-09-10
The present invention is a process for purification of 1,3-propanediol (PDO) by an inverted distillation sequence which comprises: (a) optionally removing water or other solvents from the crude 1,3-propanediol mixture; (b) distilling the crude 1,3-propanediol mixture under conditions which maximize the separation of components of the mixture which are heavier than 1,3-propanediol from the 1,3-propanediol and the components which are lighter than 1,3-propanediol; (c) drawing off a stream which contains at least most of the 1,3-propanediol and at least some of the components of the mixture which are lighter than 1,3-propanediol; and (d) distilling the stream of (c) to separate the 1,3-propanediol from components in the stream which are lighter than 1,3-propanediol and any residual components which are heavier than 1,3-propanediol.
本发明涉及一种通过倒置蒸馏序列纯化1,3-丙二醇(PDO)的方法,包括:(a)可选地从原始的1,3-丙二醇混合物中除去水或其他溶剂;(b)在最大化混合物中比1,3-丙二醇重的组分与1,3-丙二醇及比1,3-丙二醇轻的组分分离的条件下蒸馏原始的1,3-丙二醇混合物;(c)抽出一条流,其中包含至少大部分1,3-丙二醇和至少一些比1,3-丙二醇轻的混合物组分;以及(d)蒸馏(c)的流以将1,3-丙二醇与流中比1,3-丙二醇轻的组分和任何比1,3-丙二醇重的残留组分分离。