Method for the dechlorination of polyvinyl chloride for the targeted production of high-value chlorine-containing chemicals and applications thereof
By reacting polyvinyl chloride (PVC) with aromatic alcohols under catalyst-free conditions, the problem of efficient conversion of chlorine in waste PVC has been solved, enabling the low-cost preparation of high-value chlorine-containing chemicals, which is suitable for the industrial production of various chlorine-containing aromatic compounds.
Patent Information
- Application Number
- CN202610789124.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-06-03
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2046-06-03
AI Technical Summary
Existing technologies are insufficient for efficiently and economically extracting and converting waste polyvinyl chloride into high-value chlorinated chemicals, especially aromatic chlorinated compounds. Furthermore, traditional methods require catalysts or electrocatalysis, resulting in high energy consumption and high costs.
Under catalyst-free conditions, the chlorine element in PVC is directionally converted into chlorinated aromatic compounds by reacting polyvinyl chloride with aromatic alcohols in a specific solvent, with controlled temperature and time. N-methylpyrrolidone and trace amounts of water are used as solvents, the reaction temperature is 100–300℃, and the time is more than 0.2 h.
It has achieved efficient and low-cost preparation of various chlorinated aromatic compounds from waste PVC, with a yield of up to 99%, simplified equipment requirements, reduced energy consumption, reduced side reactions, and has industrialization potential.