Reactant Mixture Design for Low-Coke Olefin Upgrading
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Solution Overview
Problem
Existing sustainable chemistry processes for synthesizing larger molecules face challenges with high polyaromatic hydrocarbon content, uncontrolled by-product formation, and impurities, leading to inefficiencies and additional purification steps, and coke formation in reactors, which limits their use in continuous flow reactors.
Innovation Solution
A reactant mixture comprising a first compound with a carbon-carbon double bond, a heat transfer fluid, and a stabilizer is used to conduct multistep reactions, minimizing polyaromatic hydrocarbons and impurities, and reducing coke formation, enabling high selectivity and yield production of monocyclic aromatic hydrocarbons and alicyclic hydrocarbons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If sustainable chemistry processes are used for synthesizing larger molecules, then atom economy and use of renewable sources are improved, but polyaromatic hydrocarbon content and by-product formation increase
Solution Approach 1:
The patent changes reaction parameters including temperature (50-500°C), pressure, and reaction time to optimize the balance between atom economy and polyaromatic hydrocarbon formation. Different temperature ranges are used for different reaction stages to control selectivity and minimize harmful by-products while maintaining efficient atom utilization.
Solution Approach 2:
The patent introduces intermediates such as heat transfer fluids and stabilizers that mediate the reaction process. These intermediaries help control the reaction pathway to favor desired products while minimizing polyaromatic hydrocarbon formation, acting as buffers between reactants and final products to reduce harmful by-product generation.
2Manufacturing precision
If multistep synthesis processes are used, then product selectivity can be improved, but process complexity and purification steps increase
Solution Approach 1:
The patent combines multiple reaction steps into a single continuous flow reactor system. By merging oligomerization, cyclization, and other transformation steps into one integrated process, the patent achieves high product selectivity through controlled reaction conditions while reducing overall process complexity and eliminating intermediate purification steps.
Solution Approach 2:
The patent implements continuous flow processing where reactants continuously flow through the reactor system undergoing multiple transformations. This continuous action maintains optimal reaction conditions throughout the process, improving selectivity while simplifying operation compared to batch processing with multiple discrete steps and purification interventions.
3Productivity
If reactions are conducted at high temperature, then reaction rate and productivity are improved, but coke formation in reactors increases
Solution Approach 1:
The patent introduces heat transfer fluids as intermediaries that facilitate high-temperature reactions while preventing direct contact between reactants and reactor walls. This mediation allows maintaining high reaction temperatures for improved productivity while the heat transfer fluid prevents coke deposition on reactor surfaces, reducing maintenance requirements.
Solution Approach 2:
The patent carefully controls temperature parameters within optimal ranges (50-500°C) and adjusts other parameters such as residence time and pressure to maintain high reaction rates. By optimizing the combination of parameters rather than simply maximizing temperature, the patent achieves high productivity while minimizing coke formation through precise parameter management.
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 of sustainable aviation fuels with controlled by-products and reduced reactor maintenance, enhancing efficiency and sustainability.
Implementation Method 1
A reactant mixture comprising a first compound with a carbon-carbon double bond, a heat transfer fluid, and at least one stabilizer is used to conduct multistep reactions
Implementation Method 2
at least one stabilizer
Data Source
AI summary
The invention provides a reactant mixture for conducting multistep reactions to produce products with high selectivity and yields. The mixture comprises a first compound comprising at least one carbon-carbon double bond or a precursor therefor; a heat transfer fluid; and at least one stabilizer. The reactant mixture has been found to enable synthesis of target compounds with high selectivity and yields, and improves catalyst performance by reduced coke formation. Thus, reactions spanning longer periods of time can be run, and the reagents can be recycled a number of times without compromising on yields and selectivity.