METHOD FOR PRODUCING HIGHLY POLYMERIZABLE N-VINYL CARBOXYLIC ACID AMIDE MONOMER

• Main Authors: KOBAYASHI TAKAMITSU, TANAKA NAOYUKI
• Format: Patent
• Language: English; Japanese
• Published: 26.07.2021
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY

To provide a method that can efficiently purify an N-vinyl carboxylic acid amide and produce a highly polymerizable N-vinyl carboxylic acid amide monomer.SOLUTION: A method for producing a highly polymerizable N-vinyl carboxylic acid amide monomer includes the step in which N-vinyl carboxylic acid amide monomer crude crystals containing an N-vinyl carboxylic acid amide monomer of 85-99 mass% are dissolved in a solvent mixture of toluene and a C6-7 aliphatic hydrocarbon, and then solvent crystallization is performed for solid-liquid separation, recovering an N-vinyl carboxylic acid amide monomer purified product.SELECTED DRAWING: None 【課題】効率的にＮ−ビニルカルボン酸アミドを精製して、高い重合性のＮ−ビニルカルボン酸アミド単量体を製造しうる方法を提供する。【解決手段】Ｎ−ビニルカルボン酸アミド単量体を８５〜９９質量％で含む粗Ｎ−ビニルカルボン酸アミド単量体結晶に、トルエンと炭素数６〜７の脂肪族炭化水素との混合溶媒に溶解させたのち、溶媒晶析を行い、固液分離して、Ｎ−ビニルカルボン酸アミド単量体精製物を回収する工程を含む、高重合性Ｎ−ビニルカルボン酸アミド単量体の製造方法。【選択図】 なし