A method and plant for recycling polymethyl methacrylate
EP4766687A1Pending Publication Date: 2026-07-01SULZER MANAGEMENT AG
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- SULZER MANAGEMENT AG
- Filing Date
- 2024-08-21
- Publication Date
- 2026-07-01
AI Technical Summary
Technical Problem
The recycling of polymethyl methacrylate (PMMA) via pyrolysis to produce high-purity methyl methacrylate is challenging due to the presence of impurities, which require energy-intensive distillation processes with high operational and capital costs.
Method used
A method involving pyrolysis of PMMA followed by at least one distillation step and at least one melt crystallization step to separate and remove impurities, achieving a methyl methacrylate composition with 99.8% purity and minimal impurities.
Benefits of technology
The method achieves high-purity methyl methacrylate with a yield of over 90% while significantly reducing operational and capital expenditures, making it suitable for producing high-quality PMMA for various applications.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure EP2024073435_27022025_PF_FP_ABST
Abstract
The present invention relates to a method for preparing a purified methyl methacrylate composition from a crude composition containing methyl methacrylate comprising the steps of: a) providing as crude composition a pyrolyzed composition obtained by pyrolysis of a polymethyl methacrylate composition, b) subjecting the pyrolyzed composition to at least one distillation step so as to obtain a methyl methacrylate enriched composition and c) then subjecting the methyl methacrylate enriched composition to at least one melt crystallization step so as to obtain the purified methyl methacrylate composition.
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