PRODUCTION METHOD OF BISPHENOL A, PRODUCTION METHOD OF EPOXY RESIN, AND PRODUCTION METHOD OF EPOXY RESIN CURED PRODUCT

• Main Authors: TAMURA TAKAAKI, UCHIYAMA KAORU
• Format: Patent
• Language: English; Japanese
• Published: 09.04.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC CHEMISTRY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a production method of bisphenol A which can efficiently remove a coloring component derived from a thermosetting resin cured product, and can produce bisphenol A having a good color tone.SOLUTION: A production method of bisphenol A mixes bisphenol A obtained by chemical recycling of a thermosetting resin cured product with a mother liquid obtained by a production process of bisphenol A, and circulates the mixed liquid in a specific step.SELECTED DRAWING: Figure 1 【課題】熱硬化性樹脂硬化物由来の着色成分を効率的に除去でき、色調の良好なビスフェノールＡを製造することができる、ビスフェノールＡの製造方法を提供することを目的とする。【解決手段】熱硬化性樹脂硬化物のケミカルリサイクルで得られたビスフェノールＡを、ビスフェノールＡの製造プロセスで得られる母液と混合し、当該混合液を特定の工程に循環させることで、課題を解決する。【選択図】図１