Rückgewinnung von Bisphenol A aus Wärmehärtbaren Epoxidharzen mittels Alkoholyse und Zugehörige Verfahren

Details

Veröffentlichungs-Nr.

EP4796524

Anmeldetag

24. Februar 2025

Veröffentlichung

26. August 2026

Rechtsraum

EP

Abstract

The method involves recovering Bisphenol A (BPA) monomer from a thermoset BPA-epoxy resin through alcoholysis using a C1-C3 alcohol and a hydroxide as a reaction promoter. This process is conducted under an inert atmosphere at a pressure of at least 10 bar and a temperature between 200-225°C for a minimum of 5 hours. The method allows for high yields of BPA monomer with reduced reaction times and less base usage compared to existing methods. The process includes loading 2-10 wt.% of the resin in the alcohol and can involve further steps such as crystallization and recrystallization for purification.

Anmelder

Firma

VITO NV

Land

🇧🇪 Belgien