A cyclization polymerization method, a catalyst and a preparation method of the catalyst
By using a catalyst supported on carbon dot CDs with titanium compounds and alkyl aluminum chloride, the problem of low product selectivity in the existing 1,3-pentadiene cyclization catalytic system was solved, achieving a highly selective 1,3-pentadiene cyclization polymerization reaction, simplifying the catalyst preparation process and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2023-10-30
- Publication Date
- 2026-07-14
AI Technical Summary
Existing catalytic systems for the cyclopolymerization of 1,3-pentadiene are mainly homogeneous systems, and the selectivity of the trimerized products is low, especially for the cyclic trimer 3,7,11-trimethyl-1,5,9-cyclododecanetriene, which requires further improvement.
A titanium-based catalyst composed of carbon dot CDs-supported titanium compounds and alkyl aluminum chloride was prepared by mixing and reacting with light aromatics under anhydrous and oxygen-free conditions. This catalyst was used for the cyclization polymerization of 1,3-pentadiene, simplifying the catalyst preparation process and improving the selectivity of the cyclic trimer product.
It significantly improved the selectivity of the cyclic trimer 3,7,11-trimethyl-1,5,9-cyclododecanetriene in the cyclization polymerization of 1,3-pentadiene, simplified the catalyst preparation process, and reduced costs.