公开(公告)号：US20220251012A1

公开(公告)日：2022-08-11

申请号：US17606369

申请日：2020-11-23

Applicant: LG CHEM, LTD.

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Chi Hyun JANG

IPC: C07C37/72

Abstract: The present disclosure relates to a method of decomposing a phenolic by-product, including: a step of feeding and thermally cracking a phenolic by-product stream to and in a decomposition apparatus, recovering an active ingredient from a top discharge stream, and discharging a high-boiling substance through a bottom discharge stream; a step of pressurizing each of a side discharge stream of the decomposition apparatus and a bottom discharge stream of the decomposition apparatus; a step of mixing the pressurized side discharge stream of the decomposition apparatus and the pressurized bottom discharge stream of the decomposition apparatus with each other to form a mixed stream; and a step of passing a part of the mixed stream through a reboiler, circulating the part of the mixed stream to the decomposition apparatus, and discharging a residual mixed stream.

公开(公告)号：US20220106241A1

公开(公告)日：2022-04-07

申请号：US17422686

申请日：2020-08-11

Applicant: LG CHEM, LTD

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Chi Hyun JANG

IPC: C07C7/04 ,  C07C37/74 ,  C07C45/82 ,  B01D17/02

Abstract: The present disclosure provides a method for decomposing a phenolic by-product, the method including: a step S10 of feeding a phenolic by-product stream to a decomposition apparatus and thermally cracking the phenolic by-product stream; a step S20 of recovering an active ingredient from a top discharge stream of the decomposition apparatus and discharging a substance having a high boiling point through a bottom discharge stream of the decomposition apparatus; a step S30 of passing a part of the bottom discharge stream of the decomposition apparatus through a reboiler and then feeding the part of the bottom discharge stream of the decomposition apparatus to the decomposition apparatus and discharging a residual stream of the bottom discharge stream of the decomposition apparatus; and a step S40 of feeding a side discharge stream of the decomposition apparatus to the reboiler.

公开(公告)号：US20220009868A1

公开(公告)日：2022-01-13

申请号：US17413790

申请日：2020-08-11

Applicant: LG CHEM, LTD.

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Joon Ho SHIN

IPC: C07C37/76 ,  B01D17/02

Abstract: The present disclosure provides a method for decomposing a phenolic by-product, the method including: a step S10 of injecting and mixing a bisphenol A by-product produced in a bisphenol A production process, a mixed by-product stream of phenol by-products produced in a phenol production process, a decomposition apparatus side discharge stream, and a process water stream in a mixing apparatus; a step S20 of injecting a mixing apparatus discharge stream discharged from the mixing apparatus into a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil-phase stream and a liquid-phase stream; a step S30 of feeding the oil-phase stream, which is phase-separated in the step S20 and discharged from the phase separation apparatus, to a decomposition apparatus to decompose the oil-phase stream; and a step S40 of circulating the decomposition apparatus side discharge stream obtained by the decomposition in the step S30 to the mixing apparatus in the step S10.

公开(公告)号：US20210130256A1

公开(公告)日：2021-05-06

申请号：US16478802

申请日：2018-08-17

Applicant: LG CHEM, LTD.

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Sung Ho LEE ,  Joon Ho SHIN ,  Chul Han PARK

IPC: C07C1/20 ,  C07C37/52 ,  C07C45/82

Abstract: In a process of decomposing byproducts of a phenol production process using a reactive distillation column in which a reactor and a distillation column are integrated, since acetophenone is mixed with tar recovered to a lower part of the reactive distillation column and transferred, viscosity of the tar may be lowered so that the tar may be transferred at room temperature, and since the reactive distillation column may be operated at 0.5 to 3 bar, an operating temperature of the reactive distillation column is low as compared with a method of separating acetophenone by pressurization with high pressure, significantly reducing an operation cost of a heater required for a reaction. Also, since acetophenone is separately recovered at a position of 25 to 90% of a total number of stages in the reactive distillation column, recovery of an active ingredient may be enhanced.

公开(公告)号：US20220402837A1

公开(公告)日：2022-12-22

申请号：US17777256

申请日：2021-07-12

Applicant: LG CHEM, LTD.

Inventor： In Seop KIM ,  Sang Beom LEE ,  Doo Wook KIM ,  Man Woo SON

IPC: C07C5/05 ,  C07C7/08 ,  C07C6/04 ,  B01D3/14

Abstract: Provided is a method for preparing 1-butene and propylene including: supplying a C4 mixture stream to a first hydrogenation reactor to convert 1,3-butadiene into 1-butene; supplying a discharge stream from the first hydrogenation reactor to a first distillation column, supplying a lower discharge stream from the first distillation column including 2-butene and n-butane to a metathesis reactor, and supplying an upper discharge stream from the first distillation column including 1-butene and i-butane to a second distillation column; recovering an upper discharge stream the second distillation column including i-butane and recovering 1-butene from a lower discharge stream from the second distillation column; and producing propylene in the metathesis reactor, supplying a discharge stream from the metathesis reactor to a purification unit to recover propylene, and recycling an unreacted material to the metathesis reactor.

公开(公告)号：US20220281791A1

公开(公告)日：2022-09-08

申请号：US17619211

申请日：2021-05-31

Applicant: LG CHEM, LTD.

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Chi Hyun JANG

IPC: C07C37/74 ,  C07C45/82 ,  C07C37/72 ,  C07C37/56 ,  C07C7/04 ,  C07C1/20 ,  C07C37/52

Abstract: Provided is a method of decomposing phenol-based by-product, and more particularly, a method of decomposing phenol-based by-product including: introducing a phenol-based by-product stream, a first stream of a side discharge stream from a decomposition device, and a process water stream to a mixing device and mixing the streams; introducing a discharge stream from the mixing device to a layer separation device to phase-separate the discharge stream into an oil phase and an aqueous phase; passing an oil stream discharged from the layer separation device through any one or more of a first heat exchanger and a second heat exchanger and introducing the oil stream to the decomposition device to carry out decomposition; and supplying the first stream of the side discharge stream from the decomposition device to the mixing device, forming a mixed stream of a second stream of the side discharge stream with a lower discharge stream and discharging the mixed stream, and recovering effective components from an upper discharge stream.

公开(公告)号：US20220259125A1

公开(公告)日：2022-08-18

申请号：US17629319

申请日：2021-06-15

Applicant: LG CHEM, LTD.

Inventor： Min Suk KANG ,  Sang Beom LEE ,  Ji Hyang SON ,  Chi Hyun JANG

IPC: C07C37/86 ,  C07C37/68 ,  C07C15/085 ,  C07C15/46

Abstract: Provided is a method of decomposing phenolic by-products, and more particularly, a method of decomposing phenolic by-products including: supplying a phenolic by-product stream to a decomposition device to perform thermal decomposition; separating an upper discharge stream including effective components and a lower discharge stream including materials having a high boiling point in the decomposition device; supplying the lower discharge stream from the decomposition device, a side discharge stream from the decomposition device, and a process water stream to a mixing device and mixing these streams; and supplying a discharge stream from the mixing device to a layer separation device to separate the discharge stream from the mixing device into an oil phase and an aqueous phase.

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.

公开(公告)号：US20180178141A1

公开(公告)日：2018-06-28

申请号：US15563772

申请日：2016-04-01

Applicant: LG CHEM, LTD.

Inventor： Si Nae LEE ,  Sung Kyu LEE ,  Sang Beom LEE ,  Sung Ho LEE ,  Jeong Seok KIM ,  Joon Ho SHIN ,  Dae Chul JUNG ,  Yong Hee JANG ,  Tae Moon PARK ,  Hyun Jik YI

IPC: B01D3/14 ,  B01D3/32 ,  B01D5/00 ,  G03F7/42

CPC classification number: B01D3/141 ,  B01D3/32 ,  B01D3/4261 ,  B01D5/0063 ,  G03F7/425 ,  H01L27/1288

Abstract: By using the distillation device of the present application, energy loss occurring in a purification process of a solution including a waste stripper and a stripped photoresist resin used in a stripping process of a photoresist can be minimized and the installation cost of the distillation device can be reduced compared to the case in which dual distillation columns are used, thereby increasing the economic feasibility of a process.