US 12,076,714 B2
Method for separating organozinc catalyst from polyalkylene carbonate polymerization solution
Kyung Min Min, Daejeon (KR); Seung Young Park, Daejeon (KR); Sung Kyoung Kim, Daejeon (KR); Sang Cheol Shin, Daejeon (KR); Won Seok Kim, Daejeon (KR); and Won Hee Woo, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/437,907
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 28, 2020, PCT No. PCT/KR2020/013223
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2021/066459, PCT Pub. Date Apr. 8, 2021.
Claims priority of application No. 10-2019-0120841 (KR), filed on Sep. 30, 2019.
Prior Publication US 2022/0143589 A1, May 12, 2022
Int. Cl. B01J 31/12 (2006.01); C08F 6/02 (2006.01); C08G 64/40 (2006.01)
CPC B01J 31/12 (2013.01) [C08F 6/02 (2013.01); C08G 64/40 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for separating an organozinc catalyst from a polyalkylene carbonate polymerization solution, the method comprising:
stirring and aging a polymerization solution comprising a polyalkylene carbonate resin, an organozinc catalyst, an alkylene oxide and a polymerization solvent; and
filtering the polymerization solution after completing the aging.