公开(公告)号：US20150166497A1

公开(公告)日：2015-06-18

申请号：US14407637

申请日：2013-06-14

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

Inventor： Suri N. Dorai ,  Qun Sun

IPC: C07D307/08

CPC classification number: C07D307/08 ,  C08G65/20 ,  C08G65/30 ,  C08G2650/12

Abstract: The present invention provides an improved process for preparing a narrow molecular weight distributed polytetramethylene ether glycol (PTMEG). The product polytetramethylene ether glycol has an increased number average molecular weight, a lowered polydispersity and a reduced molecular weight ratio when compared to the polytetramethylene ether glycol in the corresponding feedstock.

Abstract translation: 本发明提供了制备窄分子量分布的聚四亚甲基醚二醇（PTMEG）的改进方法。 与相应原料中的聚四亚甲基醚二醇相比，产物聚四亚甲基醚二醇具有增加的数均分子量，降低的多分散性和降低的分子量比。

公开(公告)号：US20150158976A1

公开(公告)日：2015-06-11

申请号：US14407296

申请日：2013-06-12

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

Inventor： Suri N. Dorai ,  Qun Sun

IPC: C08G65/48 ,  B01J19/24

CPC classification number: C08G65/48 ,  B01J19/24 ,  B01J2219/24 ,  C08G65/30 ,  C08G65/3311

Abstract: The present invention provides an improved process and apparatus for alkanolysis of polytetramethylene ether diacetate to polytetraalkylene ether glycol in the presence of a C1 to C4 alkanol and an alkali or alkaline earth metal catalyst wherein the catalyst component of the product mixture comprising polytetraalkylene ether glycol, alkanol and catalyst, essentially free of the alkanol acetate by-product, e.g., methyl acetate is removed by contacting the mixture in the absence of added water with certain ion exchange resin at specified contact conditions. The invention further provides a highly efficient method for removing the catalyst component of a mixture comprising polytetraalkylene ether glycol, alkanol and alkali or alkaline earth metal catalyst by contacting the mixture in the absence of added water with certain ion exchange resin at specified contact conditions,

Abstract translation: 本发明提供了在C1至C4链烷醇和碱金属或碱土金属催化剂存在下将聚四亚甲基醚二乙酸酯分解成聚四亚乙基醚二醇的改进方法和装置，其中产物混合物的催化剂组分包含聚四亚烷基醚二醇，链烷醇 和催化剂，基本上不含链烷醇乙酸酯副产物，例如，在特定接触条件下，通过在不加入水的情况下将某些离子交换树脂与混合物接触来除去乙酸甲酯。 本发明还提供了一种用于通过在不存在加入水的情况下将混合物与某些离子交换树脂在规定的接触条件下接触来除去包含聚四亚烷基醚二醇，链烷醇和碱金属或碱土金属催化剂的混合物的催化剂组分的高效方法，

公开(公告)号：US20140378712A1

公开(公告)日：2014-12-25

申请号：US14372933

申请日：2013-01-25

Applicant: INVISTA North America S.a.r.l.

Inventor： Suri N. Dorai ,  Clive Alexander Hamilton ,  Qun Sun

IPC: C08G65/00

CPC classification number: C08G65/00 ,  C08G65/20 ,  C08G65/30 ,  C08G65/32 ,  Y02P20/127

Abstract: The present invention provides an improved process for converting a diester of polyether polyol, e.g., PTMEA, to the corresponding dihydroxy product, e.g., polytetramethylene ether glycol (PTMEG) continuously in a reaction zone, such as, for example, a reactive distillation system, for achieving virtually complete conversion of PTMEA to PTMEG, and recovery of PTMEG free of unreacted or unconverted PTMEA and alkanol ester by-product.

Abstract translation: 本发明提供了一种改进的方法，其将聚醚多元醇例如PTMEA的二酯在反应区（例如反应蒸馏系统）中连续转化成相应的二羟基产物，例如聚四亚甲基醚二醇（PTMEG） 用于实现PTMEA到PTMEG的几乎完全转化，以及没有未反应或未转化的PTMEA和链烷醇酯副产物的PTMEG的回收。