公开(公告)号：EP3257886A1

公开(公告)日：2017-12-20

申请号：EP16175029.4

申请日：2016-06-17

Applicant: Sasa Polyester Sanayi A.S.

Inventor： BAGCIVAN, Bülent ,  KALPAKLI, Esin ,  KAYA, Güven

IPC: C08G63/183 ,  C08J5/18 ,  C08G63/85 ,  D01F6/62 ,  B29C49/00

CPC classification number: C08G63/85 ,  B29C49/0005 ,  B65D1/00 ,  C08G63/183 ,  C08J5/18 ,  D01D5/26 ,  D01F6/62

Abstract: The present invention relates to a process for production of polyethylene terephthalate comprising the steps of, providing a terephthalic acid monomer, providing ethylene glycol; providing a titanium based catalyst; esterification of a mixture of the monomer, ethylene glycol and titanium based catalyst in at least two steps, wherein the esterification temperature is in a range of 250°C to 280°C and increased, within the range, in each subsequent step; polymerisation at a temperature in a range of 260°C to 290°C in at least two steps and is increased or kept constant, within the range, in each subsequent step to obtain the polyethylene terephthalate.

Abstract translation: 本发明涉及生产聚对苯二甲酸乙二醇酯的方法，其包括以下步骤：提供对苯二甲酸单体，提供乙二醇; 提供钛基催化剂; 在至少两个步骤中将单体，乙二醇和钛基催化剂的混合物进行酯化，其中酯化温度在250℃至280℃的范围内并且在每个后续步骤中在该范围内增加; 在至少两个步骤中在260℃至290℃范围内的温度下聚合，并在每个后续步骤中增加或保持在该范围内以获得聚对苯二甲酸乙二醇酯。