(19)
(11) EP 4 361 199 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
12.06.2024 Bulletin 2024/24

(43) Date of publication:
01.05.2024 Bulletin 2024/18

(21) Application number: 22827638.2

(22) Date of filing: 23.06.2022
(51) International Patent Classification (IPC): 
C08G 73/10(2006.01)
B01D 69/08(2006.01)
 B01D 71/64(2006.01)
B01D 63/02(2006.01)
(52) Cooperative Patent Classification (CPC):
B01D 71/64; B01D 69/08; B01D 53/22; C08G 73/10; C01B 23/0047; B01D 71/76; B01D 71/642; B01D 71/48; B01D 71/38; B01D 71/72; B01D 53/228
(86) International application number:
PCT/CN2022/100611
(87) International publication number:
WO 2022/268146 (29.12.2022 Gazette 2022/52)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 23.06.2021 CN 202110699869
29.07.2021 CN 202110866371
29.07.2021 CN 202110864549

(71) Applicants:
  • China Petroleum & Chemical Corporation
    Beijing 100728 (CN)
  • Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
    Chaoyang District Beijing 100013 (CN)
  • Institute of Process Engineering, Chinese Academy of Sciences
    Beijing 100190 (CN)

(72) Inventors:
  • WU, Changjiang
    Beijing 100013 (CN)
  • ZHANG, Suojiang
    Beijing 100190 (CN)
  • WEI, Xin
    Beijing 100013 (CN)
  • LI, Hesheng
    Beijing 100013 (CN)
  • LUO, Shuangjiang
    Beijing 100190 (CN)
  • WANG, Yujie
    Beijing 100013 (CN)
  • ZHANG, Xinmiao
    Beijing 100013 (CN)
  • DING, Liming
    Beijing 100013 (CN)
  • MENG, Fanning
    Beijing 100013 (CN)
  • XI, Renjie
    Beijing 100013 (CN)
  • XU, Yixiao
    Beijing 100013 (CN)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) POLYIMIDE COPOLYMER AND FILM, PREPARATION METHODS THEREFOR AND APPLICATIONS THEREOF, AND SYSTEM AND METHOD FOR PURIFYING HELIUM


(57) The present application relates to a polyimide random copolymer having a structure represented by formula (I). The present application also relates to a method for preparing the polyimide random copolymer, a membrane made of the polyimide random copolymer, and a method for preparing a polyimide-based hollow fiber membrane. The present application further relates to a system for purifying helium gas and a method for purifying helium gas.