METHOD FOR USING SEPARATION DEVICE AND SEPARATION DEVICE

• Main Authors: MORI NOBUHIKO, NAGAI FUMIYASU, INOUE TAKAMITSU, HYODO ATSUSHI
• Format: Patent
• Language: English; Japanese
• Published: 15.06.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

PROBLEM TO BE SOLVED: To stop membrane separation and more suppress deterioration in permeation flux when the membrane separation is reopened.SOLUTION: A method for using a separation device that treats a liquid to be treated, which is discharged from a step of producing a phenol resin and contains water and phenol, with a membrane separation section having a zeolite membrane that selectively permeates water therethrough includes: a membrane separation step of performing a membrane separation treatment of separating water from the liquid to be treated using the membrane separation section; and a liquid discharge step of discharging a liquid from the membrane separation section until the next membrane separation treatment starts after the stop of the membrane separation treatment. In the liquid discharge step, a pressure in the membrane separation section is preferably reduced.SELECTED DRAWING: None 【課題】膜分離を停止し再開する際の透過流束の低下をより抑制する。【解決手段】本発明の分離装置の使用方法は、フェノール樹脂の製造工程から排出された、水及びフェノールを含む処理対象液を、水を選択的に透過させるゼオライト膜を備えた膜分離部で処理する分離装置の使用方法であって、膜分離部を用いて処理対象液から水を分離する膜分離処理を行う膜分離工程と、膜分離処理の停止後、次回の膜分離処理を開始するまでの間に、膜分離部からの液の排出を行う液排出工程を含む。液排出工程では、さらに、膜分離部内の減圧を行うことが好ましい。【選択図】なし