US 12,391,639 B2
Membrane separation process for separating carbonate-containing diaminoalkane solution
Ho Bum Park, Seoul (KR); Tae Hoon Lee, Daejeon (KR); Jaehun Lee, Seoul (KR); Young Lyeol Yang, Seoul (KR); Changyub Oh, Seoul (KR); Jung Min Lee, Seoul (KR); and Jihyun Shin, Seoul (KR)
Assigned to CJ CHEILJEDANG CORPORATION, Seoul (KR)
Appl. No. 17/906,603
Filed by CJ CHEILJEDANG CORPORATION, Seoul (KR)
PCT Filed Mar. 10, 2021, PCT No. PCT/KR2021/002949
§ 371(c)(1), (2) Date Sep. 19, 2022,
PCT Pub. No. WO2021/187796, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 10-2020-0033955 (KR), filed on Mar. 19, 2020.
Prior Publication US 2023/0167049 A1, Jun. 1, 2023
Int. Cl. C07C 209/86 (2006.01); B01D 61/22 (2006.01); B01D 63/02 (2006.01); B01D 71/26 (2006.01); B01D 71/34 (2006.01); B01D 71/68 (2006.01); C07C 211/09 (2006.01)
CPC C07C 209/86 (2013.01) [B01D 61/22 (2013.01); B01D 63/02 (2013.01); B01D 71/262 (2022.08); B01D 71/34 (2013.01); B01D 71/68 (2013.01); C07C 211/09 (2013.01); B01D 2311/04 (2013.01); B01D 2311/06 (2013.01); B01D 2311/10 (2013.01); B01D 2311/14 (2013.01); B01D 2311/16 (2013.01); B01D 2311/22 (2013.01); B01D 2311/2669 (2013.01); B01D 2311/2688 (2013.01); B01D 2317/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of removing carbon dioxide from a carbonate-containing diaminoalkane solution, the method comprising passing the carbonate-containing diaminoalkane solution through a membrane module, wherein the membrane module is a hollow fiber membrane made of polysulfone (PSf), polyvinylidene fluoride (PVDF), or polypropylene (PP), thereby removing carbon dioxide from the carbonate-containing diaminoalkane solution.