专利检索 ap:("Ved P. Gupta" OR "Louis A. DuPont") AND inv:"Louis A. DuPont" 第 1 页

1.

发明授权
Production of terephthalate esters by degradative transesterification of scrap or virgin terephthalate polyesters 失效
标题翻译：通过废料或原始对苯二甲酸酯聚酯的降解酯交换反应生产对苯二甲酸酯

公开(公告)号：US4929749A

公开(公告)日：1990-05-29

申请号：US323977

申请日：1989-03-15

申请人： Ved P. Gupta , Louis A. DuPont

发明人： Ved P. Gupta , Louis A. DuPont

IPC分类号： C08J11/24 , C07C67/03 , C07C67/48 , C07C69/82

CPC分类号： C07C67/48 , C07C67/03 , C08J11/24 , C08J2367/02 , Y02W30/706

摘要： A process for the production of terephthalate esters having the following general formula (I). ##STR1## Substituents R and R' are the same or different and represent a straight chain or branched alkyl group having from 6 to 15 carbon atoms. The process comprises reacting a terephthalate polyester with a high molecular weight alcohol or mixture of high molecular weight alcohols in the presence of a catalyst and recovering the desired compound according to formula (I). This process is particularly useful for recycling scrap terephthalate polyesters such as polyethylene terephthalate and polybutylene terephthalate.