公开(公告)号：US20150191567A1

公开(公告)日：2015-07-09

申请号：US14407492

申请日：2013-06-04

Applicant: INVISTA NORTH AMERICA S.A.R.L.

Inventor： George Malcom Williamson

IPC: C08G65/30 ,  B01D3/36 ,  C08G65/20

CPC classification number: C08G65/30 ,  B01D3/36 ,  C08G65/20 ,  C08J11/02

Abstract: The present invention provides a tetrahydrofuran purge stream treatment process, and a process for manufacturing polyether glycol comprising same. The process for treating a tetrahydrofuran stream purged from a polyether glycol manufacturing process comprises steps of neutralizing acidic substances in a tetrahydrofuran stream purged from the polyether glycol manufacturing process with an aqueous base solution, feeding the neutralized effluent to an azeotropic distillation column, and distilling tetrahydrofuran and water overhead from the azeotropic distillation column. The process can further comprise a step of disposing of the neutralized salts and excess base in the aqueous bottoms stream from the azeotropic distillation column. The process can further comprise steps of recovering THF from the overhead of the azeotropic distillation column, and recycling the recovered THF to a polyether glycol manufacturing process.

Abstract translation: 本发明提供了一种四氢呋喃清洗流处理方法及其制备包含其的聚醚二醇的方法。 用于处理从聚醚二醇制造方法清洗的四氢呋喃流的方法包括以下步骤：用碱水溶液中和从聚醚二醇制造过程中清除的四氢呋喃流中的酸性物质，将中和的流出物进料到共沸蒸馏塔，并蒸馏四氢呋喃 和来自共沸蒸馏塔的塔顶馏出物。 该方法还可以包括在来自共沸蒸馏塔的水性塔底物流中处理中和的盐和过量的碱的步骤。 该方法还可以包括从共沸蒸馏塔的塔顶馏出物回收THF并将回收的THF循环到聚醚二醇制造方法的步骤。