FIELD: industrial organic synthesis.;SUBSTANCE: invention provides a method for purifying 1,3-propanediol comprising: (a) optional removal of water from raw mix containing 1,3-propanediol; (b) distillation of raw mix containing 1,3-propanediol in distillation column under conditions favoring maximum separation of mix components, which are heavier than 1,3-propanediol, from 1,3-propanediol and components, which are lighter than 1,3-propanediol; (c) withdrawal of stream containing at least major part of 1,3-propanediol and at least some components, which are lighter than 1,3-propanediol; (d) separation of stream from step (c) from components, which are heavier than 1,3-propanediol; and (e) distillation of stream from step (c) in distillation column to separate 1,3-propanediol from components of stream, which are lighter than 1,3-propanediol, and any residual components heavier than 1,3-propanediol.;EFFECT: enhanced purification efficiency.;10 cl, 3 dwg, 2 ex
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机译：技术领域：本发明提供了一种纯化1，3-丙二醇的方法，该方法包括：（a）从含有1，3-丙二醇的原料混合物中任选地除去水;和（b）在有利于最大程度地从1,3-丙二醇和轻于1，的组分中分离出比1,3-丙二醇重的混合物组分的条件下，在蒸馏塔中蒸馏含1,3-丙二醇的原料混合物。 3-丙二醇; （c）抽出至少含有1,3-丙二醇的主要部分和至少一些比1,3-丙二醇轻的组分的物流; （d）将步骤（c）的料流与重于1,3-丙二醇的组分分离; （e）将来自步骤（c）的料流在蒸馏塔中蒸馏以从料流的组分中分离出1,3-丙二醇，所述组分比1,3-丙二醇轻，并且任何残留的组分比1,3-丙二醇重。效果：提高了净化效率。; 10 cl，3 dwg，2 ex
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