申请人:THE DOW CHEMICAL COMPANY
公开号:EP0335274A2
公开(公告)日:1989-10-04
Disclosed is a novel process for effecting an ether interchange reaction by heating together in the presence of a basic catalyst, a nitroaromatic ether or thioether and an organic compound containing at least one hydroxyl or mercapto group. The novelty resides particularly in carrying out the interchange in an inert solvent while sparging the heated reactants thereby to remove at least a portion of solvent along with an evolving alcohol or thiol.
The process is particularly adapted to the capping of organic polyols with nitroaromatic ether groups. The capped products are useful as intermediates for the preparation of high molecular weight polyamines which in turn find utility in various polymer applications.
本发明公开了一种新工艺,在碱性催化剂存在下,将硝基芳香族醚或硫醚和含有至少一个羟基或巯基的有机化合物一起加热,从而进行醚互换反应。新颖之处尤其在于在惰性溶剂中进行交换反应,同时对加热的反应物进行喷射,以除去至少一部分溶剂和挥发的醇或硫醇。
该工艺特别适用于有机多元醇与硝基芳香族醚基团的封端。封端的产品可用作制备高分子量多胺的中间体,而高分子量多胺又可用于各种聚合物应用。