A process for the cyclization polymerization of butadiene, catalysts used and methods of preparation
Heterogeneous catalysts were prepared by supporting titanium compounds on modified EMM-23 macroporous molecular sieves and combined with sesquiethyl aluminum chloride co-catalysts. This solved the solid waste problem of homogeneous catalysts and achieved high selectivity for butadiene cyclization polymerization and catalyst regeneration.
Patent Information
- Application Number
- CN202111238119.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-10-25
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2041-10-25
AI Technical Summary
Existing homogeneous catalysts require quenching and removal after butadiene cyclopolymerization, generating solid waste. Furthermore, the catalysts cannot be recycled, leading to environmental pollution and resource waste.
Heterogeneous catalysts were prepared by supporting titanium compounds on modified EMM-23 macroporous molecular sieves and using sesquiethylaluminum chloride as a co-catalyst to catalyze the cyclization polymerization of 1,3-butadiene. After the reaction, the catalysts were recovered by simple filtration or centrifugation for reuse.
It improves the selectivity of butadiene cyclotrimerization and cyclodimerization products, reduces solid waste generation, realizes the recycling of catalysts, and reduces environmental pollution and resource waste.