公开(公告)号：US20220111351A1

公开(公告)日：2022-04-14

申请号：US17431527

申请日：2020-11-05

申请人： LG Chem, Ltd.

发明人： Kyu Pal Kim ,  Kyunghoon Min ,  Gicheul Kim ,  Yoon Jae Min ,  Ki Hyun Kim

IPC分类号： B01J20/26 ,  B01J20/30 ,  C08F220/06 ,  C08F222/10 ,  C08F2/48 ,  C08J3/24 ,  C08K5/053 ,  C08K5/1565 ,  C08K3/36 ,  C08K3/30

摘要： A method for preparing superabsorbent polymer is disclosed herein. In some embodiments, a method includes polymerizing a monomer composition to form a hydrogel polymer, wherein the monomer composition comprises a water soluble ethylenically unsaturated monomer and a polymerization initiator, drying and grinding the hydrogel polymer to prepare a base resin powder, surface cross-linking the base resin powder using a surface cross-linking agent to prepare surface cross-linked base resin powder, and hydrating the surface cross-linked base resin powder by pulse spraying water to prepare a superabsorbent polymer, wherein a scattering index of droplets generated during the pulse spraying is 5 to 10, and wherein the scattering index is calculated in accordance with the following Mathematical Formula 1. The superabsorbent polymer can have an improved moisture content to prevent surface property change of the superabsorbent polymer, and decreased amount of fine powder which improves processability during manufacture of articles using superabsorbent polymer.

公开(公告)号：US10287229B2

公开(公告)日：2019-05-14

申请号：US15752841

申请日：2016-10-17

申请人： LG CHEM, LTD.

发明人： Yoon Jae Min ,  Se Won Baek ,  Jong Hun Song ,  Sul Hee Yoo

IPC分类号： C07C51/44 ,  B01D3/00 ,  B01D3/32

摘要： A method of continuously recovering (meth)acrylic acid is provided. The method of continuously recovering (meth)acrylic acid according to the present disclosure enables use of a natural circulation type of reboiler which does not require an operating part in a destructive distillation process of recovering (meth)acrylic acid from a (meth)acrylic acid waste liquid, and therefore, stable operation of the continuous process may be achieved while simplifying equipment configuration.

公开(公告)号：US11033834B2

公开(公告)日：2021-06-15

申请号：US16737278

申请日：2020-01-08

申请人： LG CHEM, LTD.

发明人： Yoon Jae Min ,  Se Won Baek ,  Jong Hun Song ,  Jae Yul Kim

IPC分类号： C07C57/04 ,  B01D3/14 ,  B01D11/04 ,  C07C51/44 ,  C07C51/48 ,  B01D53/14 ,  B01D3/00 ,  C07C51/50 ,  B01L3/00

摘要： The present invention relates to a continuous recovery method of (meth)acrylic acid and an apparatus for use in the recovery method. A continuous recovery method of (meth)acrylic acid according to the present invention can ensure a high recovery rate of (meth)acrylic acid through a solvent recovering process in addition to enabling the stable recovery of (meth)acrylic acid and the operation of continuous processes.

公开(公告)号：US10035751B2

公开(公告)日：2018-07-31

申请号：US14914233

申请日：2014-08-26

申请人： LG CHEM, LTD.

发明人： Jong Hun Song ,  Se Won Baek ,  Sul Hee Yoo ,  Yoon Jae Min

IPC分类号： C07C51/43 ,  C07C51/44 ,  C07C51/48 ,  B01D11/04 ,  B01D3/14 ,  B01D3/00 ,  C07C51/47

CPC分类号： C07C51/44 ,  B01D3/00 ,  B01D3/143 ,  B01D11/04 ,  B01L3/00 ,  C07C51/43 ,  C07C51/47 ,  C07C51/48 ,  Y02P20/57 ,  C07C57/04

摘要： This disclosure relates to a method for continuous recovery of (meth)acrylic acid and an apparatus used for the recovery method. The method of continuous recovery of (meth)acrylic acid according to the present invention may minimize loss of (meth)acrylic acid particularly in the distillation process, and yet enables stable operation of the distillation process and energy reduction.

公开(公告)号：US09902679B2

公开(公告)日：2018-02-27

申请号：US15325687

申请日：2015-06-24

申请人： LG CHEM, LTD.

发明人： Sul Hee Yoo ,  Se Won Baek ,  Jong Hun Song ,  Yoon Jae Min

IPC分类号： C07C51/42 ,  C07C51/46 ,  B01D3/36

CPC分类号： C07C51/46 ,  B01D3/143 ,  B01D3/36 ,  C07B63/00 ,  C07C41/46 ,  C07C51/43 ,  C07C57/04

摘要： Provided are a method and an apparatus for recovering (meth)acrylic acid. The recovering method is used to save the energy required for a process of recovering (meth)acrylic acid because a process of separating high-boiling point by-products can be omitted, and to minimize a possibility of (meth)acrylic acid polymerization during the process of recovering (meth)acrylic acid. Therefore, the recovering method is used to obtain (meth)acrylic acid with less energy in a high yield.

公开(公告)号：US11034642B2

公开(公告)日：2021-06-15

申请号：US16553733

申请日：2019-08-28

申请人： LG CHEM, LTD.

发明人： Yoon Jae Min ,  Se Won Baek ,  Jong Hun Song ,  Jae Yul Kim

IPC分类号： C07C57/04 ,  B01D3/14 ,  B01D11/04 ,  C07C51/44 ,  C07C51/48 ,  B01D53/14 ,  B01D3/00 ,  C07C51/50

摘要： The present invention relates to a continuous recovery method of (meth)acrylic acid and an apparatus for use in the recovery method. A continuous recovery method of (meth)acrylic acid according to the present invention can ensure a high recovery rate of (meth)acrylic acid through an acetic acid separation process in addition to enabling the stable recovery of (meth)acrylic acid and the operation of continuous processes.

公开(公告)号：US10894867B2

公开(公告)日：2021-01-19

申请号：US16478890

申请日：2018-12-03

申请人： LG Chem, Ltd.

发明人： Sung Soo Park ,  Jeong Kug Cho ,  Yoon Jae Min ,  Gicheul Kim ,  Se Won Baek ,  Kwang Hyon Kim

IPC分类号： C08J3/07 ,  C08J3/075 ,  C08J3/12 ,  C08J3/24

摘要： The present invention relates to a manufacturing method of a super absorbent polymer. More specifically, the present invention relates to a manufacturing method of a super absorbent polymer capable of reducing energy, reducing a process cost, and reducing a load on a device, at the time of drying due to reduction in an amount of water used during reassembly of fines, while manufacturing a super absorbent polymer exhibiting a reduced generation amount of re-fines and having excellent physical properties.

公开(公告)号：US09861908B2

公开(公告)日：2018-01-09

申请号：US14914218

申请日：2014-08-13

申请人： LG CHEM, LTD.

发明人： Jong Hun Song ,  Se Won Baek ,  Sul Hee Yoo ,  Yoon Jae Min

IPC分类号： B01D3/00 ,  B01D11/04 ,  C07C51/44 ,  B01D3/40 ,  B01D3/14

CPC分类号： B01D11/0488 ,  B01D3/00 ,  B01D3/143 ,  B01D3/40 ,  B01D11/04 ,  C07C51/44 ,  C07C57/04

摘要： This disclosure relates to a method of continuous recovery of (meth)acrylic acid and an apparatus used for the recovery method. The method of continuous recovery of (meth)acrylic acid according to the present invention may effectively remove scum, thus enabling stable operation of the continuous process.

公开(公告)号：US12024577B2

公开(公告)日：2024-07-02

申请号：US17612429

申请日：2021-01-20

申请人： LG CHEM, LTD.

发明人： Yoon Jae Min ,  Gicheul Kim ,  Young Cheol Jung ,  Wonchan Park

IPC分类号： C08K5/11 ,  C08F290/06

CPC分类号： C08F290/062 ,  C08K5/11

摘要： The present disclosure relates to a preparation method of a super absorbent polymer. More specifically, it relates to a preparation method of a super absorbent polymer capable of significantly reducing the amount of fine powder generated during the process by mixing a hydrogel polymer with an additive having a specific structure, pulverizing it, and then drying it with a paddle-type dryer.

公开(公告)号：US20240100740A1

公开(公告)日：2024-03-28

申请号：US18270310

申请日：2022-07-08

申请人： LG Chem, Ltd.

发明人： Seokhyeon Baek ,  Gicheul Kim ,  Yoon Jae Min

IPC分类号： B29B13/10 ,  B29B7/58 ,  B29B9/12 ,  C08F120/06 ,  C08J3/075 ,  C08J3/12

CPC分类号： B29B13/10 ,  B29B7/588 ,  B29B9/12 ,  C08F120/06 ,  C08J3/075 ,  C08J3/12 ,  B29K2105/251 ,  C08J2333/02

摘要： A roll mill for super absorbent polymer that grinds introduced super absorbent polymer particles and discharges them. The roll mill for super absorbent polymer includes at least one pair of rollers that have plural corrugations formed on each outer perimeter surface of the roller, and are arranged parallel to each other while being spaced by a roll gap, and the number of corrugations per unit circumference of the roller may be 0.89/mm˜1.15/mm. Also disclosed is a method for preparing super absorbent polymer using the roll mill.