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. 05, 2026
Filed:
Oct. 27, 2021
Petrochina Company Limited, Beijing, CN;
Tong Liu, Beijing, CN;
Yuanyuan Cao, Beijing, CN;
Yulong Wang, Beijing, CN;
Libo Wang, Beijing, CN;
Xianming Xu, Beijing, CN;
Hongping Li, Beijing, CN;
Enhao Sun, Beijing, CN;
Xiuhui Wang, Beijing, CN;
Wei Sun, Beijing, CN;
Han Gao, Beijing, CN;
Hongling Chu, Beijing, CN;
Yongjun Zhang, Beijing, CN;
Yonggang Ji, Beijing, CN;
Kecun MA, Beijing, CN;
Yan Jiang, Beijing, CN;
Qian Chen, Beijing, CN;
Hongliang Huo, Beijing, CN;
Qi Yu, Beijing, CN;
PETROCHINA COMPANY LIMITED, Beijing, CN;
Abstract
The present invention provides a method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction. The method for separation and recovery of boron trifluoride and complexes thereof in an olefin polymerization reaction, comprising: 1) subjecting a mixture obtained after an olefin polymerization reaction to flash distillation separation to separate part of gaseous boron trifluoride; 2) subjecting the liquid phase obtained from the flash distillation separation to membrane separation to obtain complexes of boron trifluoride and a crude product of the olefin polymerization reaction; and 3) subjecting the crude product of the olefin polymerization reaction obtained in step 2) to gas stripping separation to separate the remaining gaseous boron trifluoride, so as to obtain a pure product of the olefin polymerization reaction The present invention designs a matching process based on the polymorphic characteristics of boron trifluoride and complexes thereof to achieve efficient separation of boron trifluoride and complexes thereof from polymerization intermediates.