公开(公告)号：EP2864393A1

公开(公告)日：2015-04-29

申请号：EP13808905.7

申请日：2013-06-14

Applicant: Invista Technologies S.à.r.l.

Inventor： DORAI, Suri, N. ,  SUN, Qun

IPC: C08G65/30

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.

公开(公告)号：EP2864392A1

公开(公告)日：2015-04-29

申请号：EP13806916.6

申请日：2013-06-12

Applicant: Invista Technologies S.à.r.l.

Inventor： SUN, Qun ,  DORAI, Suri, N.

IPC: C08G65/00 ,  C08G65/30 ,  C08G65/32 ,  C07C41/00

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: 本发明提供了一种改进的用于在C1-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烷醇解成聚四亚烷基醚二醇的方法和装置，其中产物混合物的催化剂组分包括聚四亚烷基醚二醇，链烷醇 和催化剂，基本上不含乙酸烷基酯副产物，通过在特定的接触条件下，在没有添加水的情况下使混合物与某些离子交换树脂接触而除去。 本发明进一步提供了一种高效方法，用于在特定接触条件下通过使混合物在没有添加水的情况下与某些离子交换树脂接触而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，

公开(公告)号：EP2742082A1

公开(公告)日：2014-06-18

申请号：EP12745959.2

申请日：2012-07-31

Applicant: Invista Technologies S.à.r.l.

Inventor： DORAI, Suri, N.

IPC: C08G65/30

CPC classification number: C08G65/20 ,  C08G65/30

Abstract: A method for minimizing color growth in a polyether polyol product during storage and loading comprising the steps of providing a polyether polyol product to be stored and loaded for transport, wherein oxidation of the polyether polyol product would cause unwanted color growth and providing a system of storage and loading tanks and maintaining the storage and loading tanks below a set temperature to prevent oxidation of the polyether polyol product. Prior to filling the tanks with the polyether polyol product, substantially all of the air in the storage and loading tanks is replaced with an inert gas. After filling the tanks with the polyether polyol product, an anti-air intrusion system is provided to prevent additional air from entering the storage and loading tanks.

公开(公告)号：EP2807208A1

公开(公告)日：2014-12-03

申请号：EP13703240.5

申请日：2013-01-25

Applicant: Invista Technologies S.à.r.l.

Inventor： DORAI, Suri, N. ,  HAMILTON, Clive, Alexander ,  SUN, Qun

IPC: C08G65/20 ,  C08G65/30

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，用于将聚醚多元醇例如PTMEA的二酯连续地在反应区例如反应性蒸馏系统中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实际上完全转化为PTMEG，以及回收不含未反应或未转化的PTMEA和链烷醇酯副产物的PTMEG。