Method for preparing polypenylene oxide
By integrating alkylation and oxidative coupling with controlled separation, the method addresses the separation challenge of ortho-cresol in polyphenylene oxide production, achieving high-yield and cost-effective polyphenylene oxide with enhanced properties.
Patent Information
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- LG CHEM LTD
- Filing Date
- 2021-07-02
- Publication Date
- 2026-07-15
AI Technical Summary
The production of polyphenylene oxide is hindered by the difficulty and cost of separating and purifying ortho-cresol byproducts due to their close boiling points with 2,6-xylenol, necessitating energy-intensive methods like multi-stage column distillation.
A method involving alkylation of phenol with methanol to produce a mixture of 2,6-xylenol and ortho-cresol, followed by oxidative coupling with a copper-based catalyst and secondary amine compound, then separating ortho-cresol under controlled conditions to obtain polyphenylene oxide.
This method reduces energy costs by eliminating the need for separate separation and purification of ortho-cresol, enabling high-yield production of polyphenylene oxide with improved molecular weight distribution and thermal properties.
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