Enhanced lewis acid-base pair catalytic system and use thereof
By introducing cyclic anhydrides into a Lewis acid-base pair catalytic system to form quaternary onium carboxylate intermediates, the problems of low reactivity and poor controllability of existing catalytic systems are solved, achieving a copolymerization reaction of epoxides and C1 monomers with high activity and high selectivity, producing polycarbonate. The catalyst is resistant to high temperatures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEBEI UNIV OF TECH
- Filing Date
- 2025-03-16
- Publication Date
- 2026-06-05
AI Technical Summary
Existing Lewis acid-base pair catalytic systems suffer from low reactivity, poor controllability, and numerous byproducts in the copolymerization of epoxides and C1 monomers, especially under high temperature and high catalyst concentration conditions.
A novel enhanced Lewis acid-base pair catalytic system is formed by introducing cyclic anhydrides with Lewis bases and Lewis acids. By generating quaternary onion carboxylate intermediates in situ, the nucleophilicity and electrophilicity of the catalyst are enhanced, thereby improving the reaction activity and selectivity.
It achieves highly active and selective catalytic reactions with a conversion frequency (TOF) of up to 78,000 h⁻¹, reduces byproducts, exhibits excellent high-temperature resistance, produces mainly polycarbonate products, and has no metal residues.
Smart Images
Figure CN119978339B_ABST