Zeolitic Catalyst Alkene Dimerization Selectivity
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Solution Overview
Problem
The existing dimerization of alkenes process using acidic resins and selectivity enhancers like methanol and 2-butanol results in non-optimized selectivities, particularly for highly branched products, and requires a more efficient and cost-effective catalyst regeneration method.
Innovation Solution
A catalytic process utilizing zeolitic materials with specific framework structures, such as MOR, BEA, and MFI, as catalysts for the dimerization of alkenes, which maintains high selectivity and conversion rates over extended reaction times and allows for effective regeneration without significant performance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If acidic resins and selectivity enhancers (methanol, 2-butanol) are used for alkene dimerization, then the reaction can proceed, but the selectivity towards highly branched products is not optimized
Solution Approach 1:
The patent changes the fundamental parameter of catalyst type from acidic resins to zeolitic materials with specific framework structures (MOR, BEA, MFI, FER, TON, or FAU). This parameter change inherently provides both the required catalytic activity and optimized selectivity towards highly branched dimerization products, eliminating the need for additional selectivity enhancers and simplifying the process.
2Reliability
If acidic resins are used as catalyst, then dimerization reaction occurs, but catalyst regeneration is complex and costly
Solution Approach 1:
The patent changes the catalyst material parameter from acidic resins to zeolitic materials, which possess inherent structural stability and resistance to deactivation. This parameter change enables simpler regeneration processes through standard calcination procedures, maintaining catalyst performance across multiple cycles without complex regeneration protocols.
3Productivity
If extended reaction times are used to improve conversion, then more alkene is converted, but selectivity may decrease and catalyst deactivation increases
Solution Approach 1:
The patent changes the catalyst material to zeolitic materials with specific framework structures that provide shape-selective catalysis. This parameter change enables the catalyst to maintain high selectivity towards highly branched dimerization products even during extended reaction times and at higher conversion levels, preventing catalyst deactivation and side reactions that plague conventional systems.
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 process achieves high selectivity and yield for highly branched dimerization products and maintains catalyst performance even after multiple regeneration cycles, ensuring economic viability and prolonged reaction efficiency.
Implementation Method 1
A catalytic process for the dimerization of alkenes using a zeolitic material as the catalyst
Data Source
AI summary
The present invention relates to a process for the dimerization of alkenes comprising (1) providing a gas stream comprising one or more alkenes; and (2) contacting the gas stream provided in (1) with a catalyst for obtaining a mixture M1 comprising one or more dimerization products of the one or more alkenes, wherein the catalyst in (2) comprises a zeolitic material having a framework structure type selected from the group consisting of MOR, BEA, FER, MFI, TON, FAU, and mixtures of two or more thereof, wherein the framework structure of the zeolitic material comprises YO2, wherein Y stands for one or more tetravalent elements.