Chromium Catalyst System for Selective Olefin Oligomerization
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Solution Overview
Problem
Existing methods for producing linear alpha-olefins like 1-hexene and 1-octene require additional separation steps and lack selectivity in olefin oligomerization, leading to inefficiencies and increased energy consumption.
Innovation Solution
A novel ligand compound with a specific chemical structure, combined with an organic chromium compound, forms a catalyst system that exhibits high selectivity and catalytic activity for olefin oligomerization, allowing for efficient production of 1-hexene and 1-octene without the need for additional separation steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Shell Higher Olefin Process is used to produce linear alpha-olefins, then production capacity is achieved, but additional separation steps are required due to Schultz-Flory distribution
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by introducing a specific chromium-based catalyst with particular ligands (Formula 1 and Formula 2) to alter the product distribution from Schultz-Flory to a more selective oligomerization pattern, thereby reducing the need for separation steps while maintaining production capacity
Solution Approach 2:
The patent employs a composite catalyst system combining chromium compounds with specifically designed ligand structures (Formula 1 and Formula 2), creating a composite material that achieves both high productivity and selectivity for linear alpha-olefins without requiring additional separation equipment
2Manufacturing precision
If selective oligomerization catalyst system is used, then selectivity to specific alpha-olefins is improved, but catalytic activity may be reduced
Solution Approach 1:
The patent optimizes the chemical parameters of the catalyst by adjusting the ligand structure (Formula 1 and Formula 2) and chromium compound composition to achieve the right balance between selectivity and catalytic activity, ensuring both high manufacturing precision and productivity
Solution Approach 2:
The patent creates a composite catalyst system where the synergistic interaction between the chromium compound and the specifically designed ligands enhances both selectivity and catalytic activity simultaneously, resolving the trade-off between manufacturing precision and productivity
3Manufacturing precision
If additional separation steps are implemented to obtain specific alpha-olefins, then product purity is improved, but energy consumption increases
Solution Approach 1:
The patent changes the reaction parameters through catalyst design to produce high-purity linear alpha-olefins directly from the oligomerization reaction, eliminating or minimizing the need for energy-intensive separation and purification steps while maintaining product purity
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 catalyst system significantly enhances the selectivity and efficiency of alpha-olefin production, reducing by-products like high molecular weight solids and minimizing the need for energy-intensive separation processes.
Implementation Method 1
a catalyst system for olefin oligomerization according to any one of claims 1 to 3
Implementation Method 2
an organic chromium compound comprising the ligand compound and chromium (Cr)
Data Source
AI summary
The present invention relates to a ligand compound, catalyst system for olefin oligomerization, and a method for oligomerizing olefins using the same. The catalyst system for olefin oligomerization according to the present invention exhibits high selectivity to 1-hexene or 1-octene while having excellent catalytic activity, thus enabling more efficient preparation of alpha-olefins.