US 12,115,516 B2
Method for manufacturing carboxymethyl cellulose particles, carboxymethyl cellulose particles manufactured thereby, and absorbent article comprising same
Soo Hee Park, Ulsan (KR); Hee Soo Kim, Hwaseong-Si (KR); and Sang Yob Kim, Goyang-Si (KR)
Assigned to LOTTE FINE CHEMICAL CO., LTD., Ulsan (KR)
Appl. No. 17/436,147
Filed by LOTTE FINE CHEMICAL CO., LTD., Ulsan (KR)
PCT Filed Mar. 4, 2020, PCT No. PCT/KR2020/003085
§ 371(c)(1), (2) Date Sep. 3, 2021,
PCT Pub. No. WO2020/180117, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10-2019-0024793 (KR), filed on Mar. 4, 2019; and application No. 10-2019-0024794 (KR), filed on Mar. 4, 2019.
Prior Publication US 2022/0126269 A1, Apr. 28, 2022
Int. Cl. B01J 20/24 (2006.01); A61L 15/28 (2006.01); A61L 15/60 (2006.01); B01J 20/28 (2006.01); B01J 20/30 (2006.01); C08B 1/08 (2006.01); C08B 11/12 (2006.01); C08B 15/00 (2006.01); C08J 3/12 (2006.01); C08J 3/24 (2006.01)
CPC B01J 20/24 (2013.01) [A61L 15/28 (2013.01); A61L 15/60 (2013.01); B01J 20/28011 (2013.01); B01J 20/28016 (2013.01); B01J 20/3021 (2013.01); B01J 20/3071 (2013.01); B01J 20/3085 (2013.01); C08B 1/08 (2013.01); C08B 11/12 (2013.01); C08B 15/005 (2013.01); C08J 3/126 (2013.01); C08J 3/245 (2013.01); B01J 2220/44 (2013.01); B01J 2220/68 (2013.01); C08J 2301/28 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for manufacturing carboxymethyl cellulose particles, comprising:
(1) a step of obtaining alkalized cellulose by reacting a cellulose raw material with an alkalizer;
(2) a step of obtaining carboxymethyl cellulose by reacting the alkalized cellulose with a carboxy methylating agent;
(3) a primary cross-linking step of obtaining a slurry-phase carboxymethyl cellulose cross-linked body by reacting the carboxymethyl cellulose with a core cross-linker;
(4) a step of washing and dehydrating after filtering the slurry-phase carboxymethyl cellulose cross-linked body;
(5) a secondary cross-linking step of obtaining carboxymethyl cellulose having a core-shell structure by reacting the carboxymethyl cellulose cross-linked body having undergone Step (4) with a surface cross-linker; and
(6) a step of obtaining carboxymethyl cellulose particles having a core-shell structure by drying and pulverizing the carboxymethyl cellulose having a core-shell structure.