公开(公告)号：US08987521B2

公开(公告)日：2015-03-24

申请号：US13164677

申请日：2011-06-20

申请人： Chungu Xia ,  Heyuan Song ,  Jing Chen ,  Zhen Li

发明人： Chungu Xia ,  Heyuan Song ,  Jing Chen ,  Zhen Li

IPC分类号： C07C41/14 ,  C07C41/56 ,  C07C41/58

CPC分类号： C07C41/56 ,  B01J31/0284 ,  B01J2231/14 ,  B01J2231/42 ,  C07C41/58 ,  Y02P20/582 ,  Y02P20/584 ,  C07C43/30

摘要： It is disclosed a method for preparing polyoxymethylene dimethyl ethers by continuous polymerization and acetalation reactions. The method may include two steps: performing a polymerization reaction of an aqueous formaldehyde solution under catalysis of an ionic liquid IL I to obtain a mixed aqueous solution of trioxymethylene and formaldehyde; and an acetalation reaction of the mixed aqueous solution of trioxymethylene and formaldehyde with methanol is performed under catalysis of an ionic liquid IL II to prepare polyoxymethylene dimethyl ethers. The method may use an aqueous formaldehyde solution as a starting material to prepare polyoxymethylene dimethyl ethers by continuous polymerization and acetalation reactions, achieving a high use ratio of formaldehyde. A film evaporator is used in the invention, realizing a rapid separation and recycling of the light components, with a high separation efficiency. The separation of the catalyst is simple, thereby realizing recycling of the catalyst.

摘要翻译： 公开了通过连续聚合和缩醛化反应制备聚甲醛二甲醚的方法。 该方法可以包括以下两个步骤：在离子液体IL I的催化下进行甲醛水溶液的聚合反应，得到三甲基甲醛和甲醛的混合水溶液; 并且在离子液体IL II的催化下进行三甲醛和甲醛与甲醇的混合水溶液的缩醛化反应，以制备聚甲醛二甲醚。 该方法可以使用甲醛水溶液作为起始原料，通过连续聚合和缩醛化反应制备聚甲醛二甲醚，实现甲醛的高使用比例。 在本发明中使用薄膜蒸发器，以高分离效率实现轻组分的快速分离和再循环。 催化剂的分离是简单的，从而实现催化剂的再循环。

公开(公告)号：US08816131B2

公开(公告)日：2014-08-26

申请号：US13154359

申请日：2011-06-06

申请人： Jing Chen ,  Heyuan Song ,  Chungu Xia ,  Zhen Li

发明人： Jing Chen ,  Heyuan Song ,  Chungu Xia ,  Zhen Li

IPC分类号： C07C41/58 ,  C07C41/50 ,  C07C41/56

CPC分类号： C07C41/50 ,  B01J31/0279 ,  B01J31/0281 ,  B01J31/0284 ,  B01J31/0288 ,  B01J31/40 ,  B01J2231/40 ,  C07C41/14 ,  C07C41/56 ,  Y02P20/126 ,  Y02P20/584 ,  C07C43/30 ,  C07C43/10

摘要： It is related to a method for preparing polyoxymethylene dimethyl ethers by a continuous acetalation reaction of trioxymethylene and methanol or methylal catalyzed by an ionic liquid. The processing apparatus used in the method includes a reaction zone, a separation zone, a catalyst regeneration zone and a product dehydration zone. A manner of circulating tubular reaction is used, resulting in a high external heat exchange efficiency, a simple structure of design and a low investment. A film evaporator is used, realizing a rapid separation and recycling of the light component, with a high separation efficiency. The separation of the catalyst solution from the crude product is simple, thereby realizing the regeneration and recycling of the catalyst.

摘要翻译： 它涉及一种通过三氯甲烷和甲醇或甲缩醛通过离子液体催化的连续缩醛反应制备聚甲醛二甲醚的方法。 该方法中使用的处理装置包括反应区，分离区，催化剂再生区和产物脱水区。 使用循环管状反应的方式，导致外部热交换效率高，设计结构简单，投资少。 使用薄膜蒸发器，实现轻组分的快速分离和再循环，分离效率高。 催化剂溶液与粗产物的分离是简单的，从而实现催化剂的再生和再循环。