Bridged Metallocene Catalyst for Poly-alpha-olefin Lubricant Synthesis
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Solution Overview
Problem
China lags in the research and development of poly-α-olefin (PAO) synthesis, particularly in using single active center metallocene catalysts, resulting in a gap in viscosity and temperature performance compared to products synthesized with non-single active center catalysts.
Innovation Solution
A metallocene compound comprising a substituted aryl group, a bridged atom, and a metal coordination group, specifically designed for use as a catalyst in the synthesis of poly-α-olefin as a lubricating base oil, with a formula including a 5H-indeno [1,2-b] pyridyl or 5H-indeno [1,2-b] thiopyranyl group, is developed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If non-single active center catalysts are used for PAO synthesis, then production cost and process complexity are reduced, but viscosity and temperature performance of the product are insufficient
Solution Approach 1:
The patent changes the chemical structure parameters of the catalyst by introducing specific bridged metallocene structures with controlled ligand configurations. This modifies the catalytic activity parameters to achieve single active center behavior, thereby improving product uniformity and viscosity-temperature performance while maintaining reasonable structural complexity through systematic ligand design
Solution Approach 2:
The patent creates a composite catalyst system by combining bridged metallocene structure with specific ligand components (indeno[1,2-b]pyridyl or indeno[1,2-b]thiopyranyl groups). This composite structure integrates multiple functional elements that work synergistically to provide single active center catalysis with enhanced product performance
2Manufacturing precision
If bridged metallocene catalysts are used for medium and high viscosity PAO synthesis, then product viscosity performance is improved, but catalytic activity and synthesis efficiency may be reduced
Solution Approach 1:
The patent applies local quality by creating specific active sites within the bridged metallocene structure through strategic ligand placement. The indeno[1,2-b]pyridyl or indeno[1,2-b]thiopyranyl groups provide localized electronic and steric properties that optimize both the viscosity control and catalytic activity, ensuring high synthesis efficiency while achieving desired viscosity performance
Solution Approach 2:
The patent optimizes the balance between viscosity performance and synthesis efficiency by adjusting catalytic parameters such as ligand substitution patterns, bridging atom types, and metal center selection. These parameter changes tune the catalyst to maintain high activity while producing medium and high viscosity PAO with controlled molecular architecture
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The metallocene compound provides structurally stable and high catalytic efficiency, facilitating the production of lubricating base oils with improved viscosity and temperature performance, suitable for high-critical applications.
Implementation Method 1
The metallocene compound comprises a substituted aryl group, a bridged atom, an unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] pyridyl group or unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] thiopyranyl group, and a metal coordination group, and the catalyst has a formula of: [formula shown]
Data Source
AI summary
The present invention relates to a metallocene compound, and preparation and use thereof, and the compound can be used as a catalyst for synthesis of poly-α-olefin as lubricating base oil. The metallocene compound includes a substituted aryl group, a bridged atom, an optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] pyridyl group or optionally unsubstituted, 3-mono-substituted or 3,6-disubstituted 5H-indeno [1,2-b] thiopyranyl group, and a metal coordination group. As a catalyst, the metallocene compound is shown to be structurally stable and high in catalytic efficiency, and the preparation of the catalyst is relatively easy in operation, high in yield, low in cost, low in pollution and easy to scale up for industrial production.