-
公开(公告)号:US20120223270A1
公开(公告)日:2012-09-06
申请号:US13040550
申请日:2011-03-04
申请人: Abdullah M. Alabdulrahman , Hamid A. Almegren , Fares D. Alsewailem , Phillip Joe Brock , Daniel Joseph Coady , Kazuki Fukushima , James Lupton Hedrick , Hans Werner Horn , Julia Elizabeth Rice
发明人: Abdullah M. Alabdulrahman , Hamid A. Almegren , Fares D. Alsewailem , Phillip Joe Brock , Daniel Joseph Coady , Kazuki Fukushima , James Lupton Hedrick , Hans Werner Horn , Julia Elizabeth Rice
IPC分类号: C07C67/333 , C09K3/00
摘要: A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.
摘要翻译: 一种方法包括形成包含对苯二甲酸酯聚酯,含有2-5个碳原子的二醇和脒有机催化剂的反应混合物; 在约120℃以上的温度下加热反应混合物以使对苯二甲酸酯聚酯解聚,从而形成包含单体二羟基对苯二酸酯二酯的对苯二甲酸酯反应产物; 其中对苯二甲酸酯反应产物含有对苯二甲酸酯低聚物的量小于由i)用等摩尔量的胍催化剂代替脒有机催化剂而产生的对苯二甲酸酯低聚物的量,和ii)在其它相同的反应条件下使对苯二甲酸酯聚酯解聚。