公开(公告)号：US3844976A

公开(公告)日：1974-10-29

申请号：US8113970

申请日：1970-10-15

Applicant: M & T CHEMICALS INC

Inventor： VENTURA J ,  RAVENSCROFT P

IPC: C08F4/20 ,  C08G63/85 ,  C08F21/04 ,  C08G17/013 ,  C08G17/015

CPC classification number: C08G63/85

Abstract: A process for preparing polyethylene terephthalate wherein dimethyl terephthalate is reacted with ethylene glycol to form an ester of ethylene glycol and terephthalic acid or where terephthalic acid is reacted with ethylene glycol to form an ester of terephthalic acid and ethylene glycol where the resulting ester is polycondensed in the presence of a polycondensation catalyst, the improvement comprising carrying out the condensation or polymerization of the ester in the presence of a catalytic amount of a novel catalyst mixture comprising (1) an antimony compound and (2) an arsenic compound. The antimony compounds are Sb(Y)n or Y3Sb O and the arsenic compounds are As(Y)n or Y3As O wherein Y is R, -OOCR, halogen, OR, -SR, -OOCRSH, -SRCOOR'' or WHEREIN R and R'' are alkyl, alkenyl, cycloalkyl, aralkyl, aryl or alkaryl and n is 3 or 5.

Abstract translation: 一种制备聚对苯二甲酸乙二醇酯的方法，其中将对苯二甲酸二甲酯与乙二醇反应形成乙二醇和对苯二甲酸的酯，或者使对苯二甲酸与乙二醇反应形成对苯二甲酸和乙二醇的酯，其中所得酯缩聚在 存在缩聚催化剂，其改进包括在催化量的催化剂混合物的存在下进行酯的缩合或聚合，所述催化剂混合物包含（1）锑化合物和（2）砷化合物。