Abstract: A method of preparing isopropyl alcohol including: supplying a feed stream including a propylene monomer and water to a reaction unit and reacting the propylene monomer and water to produce a reaction product including isopropyl alcohol, the propylene monomer, and the water; supplying a first discharge stream including a gaseous reaction product and a second discharge stream including a liquid reaction product from the reaction unit to a stripper; and in the stripper, circulating an upper discharge stream including the propylene monomer to the reaction unit and supplying a lower discharge stream including water and isopropyl alcohol to an isopropyl alcohol purification unit, where the first discharge stream is condensed by a first heat exchanger and supplied as a liquid phase to the stripper.

Abstract: A method for preparing isopropyl alcohol including: feeding a feed stream containing a propylene monomer and water to a reaction unit, where the propylene monomer and the water react to form a reaction product containing isopropyl alcohol, the propylene monomer, and the water; feeding each of a first discharge stream and a second discharge stream discharged from the reaction unit to a stripper, where the first discharge stream contains a vapor-phase reaction product, which is condensed through a first heat exchanger and fed to the stripper in a liquid-phase, and wherein the second discharge stream contains a liquid-phase reaction product; and separating a top discharge stream and a bottom discharge stream from the stripper, wherein the top discharge stream contains the propylene monomer and the bottom discharge stream contains the water and the isopropyl alcohol.

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.

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.

Abstract: Provided is a method for preparing ethylene with improved energy efficiency which can reduce energy due to direct heat exchange between processes.

Abstract: Provided is a method for preparing ethylene with improved energy efficiency which can reduce energy due to direct heat exchange between processes.

Abstract: Provided is a method for preparing ethylene with improved energy efficiency which can reduce energy due to direct heat exchange between processes.

Abstract: A logistics support method of a logistics support system for supporting online shopping includes: receiving a usable range for a waybill number from at least one delivery service company system; receiving product order information, except for personal information, from a sales company server selling a product; receiving a request for waybill output information containing the product order information from a supply company system supplying the product or the delivery service company system delivering the product; receiving and encrypting the personal information corresponding to the product order information from the sales company server; generating the waybill output information containing the encrypted personal information, the product order information, and a waybill number belong to the usable waybill number range; and transmitting the waybill output information to the supply company system or the delivery service company system.