NON-AQUEOUS SOLVENT PURIFYING METHOD

• Main Authors: NUKUI IKU, SHIOTANI YUI, TAKADA TOMOKO, ITO YOSHIKAZU
• Format: Patent
• Language: English; Japanese
• Published: 07.01.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING

To provide a non-aqueous solvent purifying method that includes a pretreatment step of removing water from an ion exchange resin containing water by passing a non-aqueous solvent for dehydration treatment, the method being characterized in that the amount of the non-aqueous solvent used for dehydration treatment in the pretreatment step is small.SOLUTION: The non-aqueous solvent purifying method includes: a pretreatment step of removing water from a granular resin having an ion exchange group by passing a non-aqueous solvent for the dehydration treatment through a packed layer of the granular resin having the ion exchange group before the dehydration treatment; a purification step of purifying the non-aqueous solvent to be purified by passing the non-aqueous solvent to be purified through the packed layer of the granular resin having the ion exchange group after the dehydration treatment. The granular resin having the ion exchange group is a granular resin having a central portion in which the ion exchange group is not introduced and a surface layer portion in which the ion exchange group is introduced.SELECTED DRAWING: None 【解決課題】脱水処理用の非水溶媒を通液することにより、水分を含有しているイオン交換樹脂の水分を除去するための前処理工程を有する非水溶媒の精製方法において、前処理工程での脱水処理用の非水溶媒の使用量が少ない非水溶媒の精製方法を提供すること。【解決手段】脱水処理前のイオン交換基を有する粒状樹脂の充填層に、脱水処理用の非水溶媒を通液することにより、該イオン交換基を有する粒状樹脂の水分を除去する前処理工程と、脱水処理後の該イオン交換基を有する粒状樹脂の充填層に、精製対象の非水溶媒を通液することにより、精製対象の非水溶媒を精製する精製工程と、を有し、該イオン交換基を有する粒状樹脂は、イオン交換基が導入されていない中心部分と、イオン交換基が導入されている表層部分と、を有する粒状樹脂であること、を特徴とする非水溶媒の精製方法。【選択図】なし