The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2023
Filed:
Sep. 07, 2020
Avantgarde (Shanghai) Environmental Technology Co., Ltd., Shanghai, CN;
Huayu Fang, Shanghai, CN;
Enbin Zhu, Shanghai, CN;
Dubin Wang, Shanghai, CN;
Guoqing Yu, Shanghai, CN;
Jincheng Chen, Shanghai, CN;
Tianyuan Li, Shanghai, CN;
Jiantong Wu, Shanghai, CN;
Jianhua Chen, Shanghai, CN;
Shengyao Lin, Shanghai, CN;
Other;
Abstract
The invention present invention belongs to waste polyester recycling technology field and relates to a method and a device for recycling waste polyester, in particular to a method and a device for recycling waste polyester by modified chemical method to recover waste polyester to prepare dimethyl terephthalate (DMT). The recycling method of the present invention uses a process of continuous feeding, continuous alcoholysis and continuous transesterification. It can make the material undergo homogeneous alcoholysis in the melted state, and the required alcoholysis time is short. Because more than two alcoholysis tanks are used in series for continuous alcoholysis, the product quality of alcoholysis product is stable. When the alcoholysis product is continuously transesterified, it avoids the occurrence of side reactions and the unstable quality of the transesterified product, and the purity and yield of recycling product of waste polyester are greatly improved.