公开(公告)号：US20220089469A1

公开(公告)日：2022-03-24

申请号：US17420339

申请日：2020-06-09

Applicant: LG CHEM, LTD

Inventor： Sung Woo JEONG ,  In Yong JEONG ,  Sang Ho LEE ,  Eun Jung JOO ,  Dae Young SHIN

IPC: C02F11/127 ,  B01D53/26

Abstract: A centrifugal dehydrator according to an embodiment of the present disclosure for solving the above problems includes: a slurry flow tube through which slurry, in which polymers and water are mixed, flows; a gas flow tube through which a gas flows; a mixture flow tube which is connected from the slurry flow tube and the gas flow tube and through which a mixture of the slurry and the gas flows; a basket into which the mixture is injected from the mixture flow tube and which rotates to apply centrifugal force to the slurry in the mixture; a driving part that allows the basket to rotate; and a porous plate disposed on a peripheral portion of the basket to discharge the water from the slurry to the outside of the basket.

公开(公告)号：US20220402229A1

公开(公告)日：2022-12-22

申请号：US17628020

申请日：2021-07-09

Applicant: LG CHEM, LTD.

Inventor： In Yong JEONG ,  Sung Woo JEONG ,  Eun Jung JOO

IPC: B30B9/06 ,  B30B9/26 ,  B30B7/02 ,  C08F6/22 ,  C08F6/00

Abstract: Disclosed is a compression type dehydrator including: an upper plate that includes a pressurizing portion and a first guide adjacent to the pressurizing portion and spaced apart from the pressurizing portion, and performs a vertical movement by a hydraulic cylinder; a feed plate that includes a hollow portion and a first guide groove surrounding the hollow portion and guiding the vertical movement of the first guide, and is positioned on a lower portion of the upper plate; a slurry supply line connected to the feed plate; a lower plate positioned on a lower portion of the feed plate and having a plurality of holes formed therein; and a dehydration means including a filtration belt positioned in close contact with an upper portion of the lower plate.

公开(公告)号：US20200206726A1

公开(公告)日：2020-07-02

申请号：US16634787

申请日：2019-01-22

Applicant: LG CHEM, LTD.

Inventor： Sung Ho Lee ,  Sang Beom Lee ,  Joon Ho Shin ,  In Yong JEONG ,  Min Suk KANG

IPC: B01J47/016 ,  C07C37/82 ,  C07C37/20 ,  B01J39/04

Abstract: Provided are a method for washing an ion exchange resin and a method for producing bisphenol A using an ion exchange resin washed by the washing method, which may provide bisphenol A having improved purity, thermal stability, color, and the like.

公开(公告)号：US20220388014A1

公开(公告)日：2022-12-08

申请号：US17770417

申请日：2021-08-20

Applicant: LG CHEM, LTD.

Inventor： Sung Woo JEONG ,  Kee Sung CHO ,  In Yong JEONG ,  Sang Hyeon KANG ,  Eun Jung JOO

IPC: B04B3/02 ,  B04B1/12 ,  B04B15/12 ,  B04B7/16 ,  F26B5/08

Abstract: Disclosed is a continuous centrifugal dewatering device including an external case having an internal space, a feed supply pipe to which a slurry as a mixture of a solid and a liquid is supplied, a basket provided inside the external case, a plurality of holes formed in the basket, a pusher plate provided inside the basket and configured to discharge a slurry cake attached to an inner circumferential surface of the basket to the outside of the external case, a non-contact seal configured to prevent the first gas from flowing into a space between the external case and the basket, and a gas inlet to which a second gas, which flows in a reverse direction with respect to a flow direction of the first gas flowing to the space between the external case and the basket, is supplied.

公开(公告)号：US20190315671A1

公开(公告)日：2019-10-17

申请号：US16073294

申请日：2018-01-04

Applicant: LG CHEM, LTD.

Inventor： Sung Ho LEE ,  Sang Beom LEE ,  Joon Ho SHIN ,  In Yong JEONG

IPC: C07C41/06 ,  B01D3/00 ,  B01J31/06

Abstract: The present invention relates to a method of preparing methyl tert-butyl ether including a reaction step of reacting methanol with iso-butene in the presence of an acid catalyst to generate methyl tert-butyl ether; and a purification step of purify the reaction product obtained by the reaction step by introducing the reaction product into a reaction distillation column including a packing stage containing an acid catalyst, wherein a flow ratio of a recycle to a fresh feed is different per the volume of each reactor. Accordingly, the amount of unreacted iso-butene and the amount of impurities included in the reactor may be reduced, resulting in reduction of the amount of thermal energy used in a reaction distillation column.

公开(公告)号：US20190225567A1

公开(公告)日：2019-07-25

申请号：US16329087

申请日：2017-11-28

Applicant: LG CHEM, LTD.

Inventor： Sang Beom LEE ,  Sung Kyu LEE ,  Joon Ho SHIN ,  Sung Ho LEE ,  Sa Eun PARK ,  In Yong JEONG

IPC: C07C39/16 ,  C07C39/04 ,  C07C37/20 ,  C07C37/88 ,  C07C37/74

Abstract: A system for producing phenol and bisphenol A comprising: a first production unit for producing phenol comprising a decomposition reaction unit and a purification unit; a second production unit for producing bisphenol A comprising a reaction unit and a concentration unit; and a removal unit for removing methanol and acetone during the production of phenol and bisphenol A. The removal unit includes a removal column comprising an overhead purge part, a bottom recirculation part and a supply part. The supply part comprises a purification unit discharge part to supply methanol, acetone, and water discharged from the purification unit to the removal column and a concentration unit discharge part to supply phenol, acetone, and water discharged from the concentration unit to the removal column, and is provided to the midsection of the removal column.