Metathesis Catalyst Ligand Design for Natural Oil Conversion
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Solution Overview
Problem
There is a need for improved efficiency in metathesis catalysts used for manufacturing materials from natural oil feedstocks, as existing catalysts are expensive and inefficient, and current methods struggle to effectively convert natural oils into industrially useful chemicals like waxes, plastics, and biofuels.
Innovation Solution
The method involves reacting terminal olefin esters with internal olefin esters in the presence of a metathesis catalyst to form unsaturated dibasic esters, which can be further hydrogenated to produce saturated dibasic esters or converted into dibasic acids, using a process that incorporates natural oil feedstocks and optimized catalyst systems to enhance yield and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing metathesis catalysts are used for manufacturing materials from natural oil feedstocks, then the manufacturing process can be performed, but the catalyst efficiency is low and the cost is high
Solution Approach 1:
The patent modifies the metathesis catalyst structure by changing ligand parameters (using N-heterocyclic carbene ligands with specific electronic and steric properties) to optimize catalytic activity and selectivity, thereby improving productivity while reducing the amount of catalyst needed
Solution Approach 2:
The invention employs composite catalyst systems combining metal centers (Ru, Mo, or W) with N-heterocyclic carbene ligands and additional phosphine or carboxylic acid ligands, creating a multi-component composite catalyst that achieves superior efficiency and reduced cost compared to single-component catalysts
2Productivity
If natural oil feedstocks are converted into industrially useful chemicals through metathesis reactions, then environmentally friendly materials can be produced, but the conversion efficiency is insufficient
Solution Approach 1:
The patent optimizes reaction parameters including temperature (50-150°C), pressure, and solvent selection to maximize conversion efficiency of natural oils to dibasic esters and acids, reducing energy consumption while maintaining high productivity
Solution Approach 2:
The invention uses readily available, inexpensive natural oil feedstocks (vegetable oils, animal fats) as starting materials, replacing expensive petroleum-based feedstocks, and employs catalytic amounts of metal complexes that can be recovered and reused
3Quantity of substance
If terminal olefin esters are reacted with internal olefin esters to form unsaturated dibasic esters, then dibasic esters and acids can be produced, but the yield is insufficient
Solution Approach 1:
The patent employs selective metathesis reactions that specifically target the formation of dibasic esters and acids from terminal and internal olefin esters, extracting the desired products while minimizing byproduct formation through catalyst selectivity and controlled reaction conditions
Solution Approach 2:
The invention incorporates in-situ product removal and reaction monitoring mechanisms where the metathesis catalyst system continuously converts reactants to products, and unreacted starting materials are recycled back into the reaction, maintaining high yield through dynamic equilibrium control
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
This approach improves the yield of dibasic esters and acids, reduces catalyst requirements, and facilitates the production of environmentally friendly materials from natural oils, offering a more efficient and cost-effective route for manufacturing chemicals and fuels.
Implementation Method 1
Metathesis is a catalytic reaction that involves the interchange of alkylidene units among compounds containing one or more double bonds (e.g., olefinic compounds) via the formation and cleavage of the carbon-carbon double bonds
Implementation Method 2
which can be further hydrogenated to produce saturated dibasic esters
Data Source
AI summary
Methods and systems for making dibasic esters and/or dibasic acids using metathesis are generally disclosed. In some embodiments, the methods comprise reacting a terminal olefin ester with an internal olefin ester in the presence of a metathesis catalyst to form a dibasic ester and/or dibasic acid. In some embodiments, the terminal olefin ester or the internal olefin ester are derived from a renewable feedstock, such as a natural oil feedstock. In some such embodiments, the natural oil feedstock, or a transesterified derivative thereof, is metathesized to make the terminal olefin ester or the internal olefin ester.