Lg Chem, Ltd

Wits Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Korea Institute of Science and Technology

Gwangju Institute of Science and Technology

Other

Electronics and Telecommunications Research Institute

Kt Corporation

Lg Chern, Ltd.

Sang Beom Lee

Joon Ho Shin

Min Suk Kang

Sung Ho Lee

Jae Hyoung Cho

Jae Suk Sung

Yong Jong Park

Seung Won Park

Hyung Wook Cho

Chang Ik Kim

Chi Hyun Jang

Ki Won Chang

Dae Ki Lim

Yu Jin Lee

Sang Ho Cho

Youn Soo Sohn

Eun Young Shin

Si Hyung Kim

Soo-Chang Song

Seung Hun Ryu

In Yong Jeong

Jun Seung Yi

Wang Mo Jung

Sung Kyu Lee

Sang Hwan Cho

Donghun Lee

Minsuk Kang

Yo Sung Ho

Hyelim Jeon

Eunsol Lho

Sangeun Kim

Jin Woong Kim

Ji Hoon Kim

Ju Hyoung Park

Chul Gyun Park

Jong Ku Lee

Chul Han Park

Seul Ki Kim

Ji Hun Cha

Chang Soo Kang

Sung Heum Park

Jeong Seok Kim

Hee Sun Han

Tae Seok Ko

Seung Jun Yang

Dong Yeol Lee

Kwan Jung Oh

In Seop Kim

Ji Hyang Son

Dae Ung Ahn

Sa Eun Park

Young Hee Joung

Tae Moon Park

Si Nae Lee

Dae Chul Jung

Do Il Choi

Yong Hee Jang

Moon Kyoon Chun

Hyun Jik Yi

Bae Hoon Lee

Man Woo Son

Doo Wook Kim

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.

Method for decomposing phenol-based by-product

A method of washing an ion exchange resin, including washing an ion exchange resin with deionized water (DI water) one or more times to prepare a washed ion exchange resin; and storing the washed ion exchange resin in dionized water. A method for producing bisphenol A using the method of washing an ion exchange resin. The resulting bisphenol A has improved purity, thermal stability, color, and the like.

Method for washing ion exchange resin and method for preparing bisphenol A

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.

Method of decomposing phenolic by-products

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.

Method for decomposing phenolic by-product

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.

Method for preparing 1-butene and propylene

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.

Method of decomposing phenolic by-product

A method of decomposing a phenol by-product produced in a phenol preparation process, in which acetophenone separated from a distillation column is mixed with tar separated and collected in a decomposition reactor, thereby significantly decreasing viscosity of tar. The decomposition method according to the present invention allows tar to have sufficient viscosity for flowability even at room temperature, whereby transfer and storage of tar may be more smoothly done without using any heating device for transfer of tar.

Method of decomposing by-product in phenol preparation process

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.

Method for decomposing phenolic by-products

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.

Method for decomposing byproducts in phenol production process

A method for decomposing a phenolic by-product generated in a phenol preparation process, the method including: adding a phenolic by-product stream, a decomposition apparatus side discharge stream, and process water to a mixing apparatus and mixing the phenolic by-product stream, the decomposition apparatus side discharge stream, and the process water; adding a mixing apparatus discharge stream discharged from the mixing apparatus to a phase separation apparatus and phase-separating the mixing apparatus discharge stream into an oil phase and an aqueous phase; feeding an oil phase stream discharged from the phase-separation apparatus and discharged to a decomposition apparatus and decomposing the oil phase stream; and circulating the decomposition apparatus side discharge stream discharged from the decomposition apparatus to the mixing apparatus.

The present disclosure relates to a method and an apparatus for decomposing a phenolic by-product generated in a bisphenol A preparation process, the method including: a step (S) of feeding the phenolic by-product to a multistage reactive distillation column; a step (S) of separating the phenolic by-product into an upper discharge stream containing an active component, a side discharge stream containing acetophenone, and a bottom discharge stream containing tar by the multistage reactive distillation column; and a step (S) of mixing the side discharge stream discharged from the multistage reactive distillation column and the bottom discharge stream discharged from the multistage reactive distillation column to form a mixed discharge stream.

Method and apparatus for decomposing phenolic by-product

A double loop antenna includes a source loop comprising: a spiral-shaped conductive source coil pattern disposed on a top surface of a board, and a source capacitor pattern comprising symmetrical conductive patterns disposed on the top surface and a bottom surface of the board; and a resonance loop comprising: a spiral-shaped conductive resonance coil pattern disposed on the bottom surface of the board, and a resonance capacitor pattern comprising symmetrical conductive patterns disposed on the top surface and the bottom surface of the board, wherein the source coil pattern and the resonance coil pattern are formed on different surfaces of the board.

Double loop antenna

Disclosed are a cathode additive of a lithium secondary battery which may have improved crystallinity and a method for preparing the same. The cathode additive may be provided to suppress generation of oxygen gas or gelation of an electrode slurry composition, which may occur due to reduction in the content of residual by-products containing lithium oxide.

Additive for cathode, method for preparing the same, cathode including the same, and lithium secondary battery including the same

A mobile terminal includes a communication controller configured to detect a wireless tag in a mobile environment and a wireless charging controller configured to receive power wirelessly, and control the communication controller to determine whether the wireless tag is in the mobile environment, in response to receiving a wake-up power signal from a wireless power transfer apparatus.

Mobile terminal, communications module and control method of mobile terminal

Growing community of inventors

Daejeon, South Korea

Sang Beom Lee