Flow Reactor Solvent Selection via Trialkyl Amine Catalyst
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Solution Overview
Problem
In flow reactors, the precipitation of amine hydrochloride as a solid can clog lines and restrict the choice of solvents, limiting the scalability and efficiency of reactions involving chlorine-containing compounds, particularly due to the low solubility of tertiary amine hydrochlorides in common organic solvents.
Innovation Solution
Using a trialkyl amine with 9 to 40 carbon atoms as a catalyst to prevent the precipitation of amine hydrochloride, allowing for the selection of a broader range of organic solvents and maintaining reactivity by dissolving the by-product, thus avoiding line clogging in flow reactors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a tertiary amine is used as a catalyst in the reaction of a chlorine-containing compound with a heteroatom compound, then the reaction rate is accelerated, but amine hydrochloride precipitates out of the solvent forming a slurry that can clog flow reactor lines
Solution Approach 1:
The harmful by-product (amine hydrochloride) is extracted from the reaction system by using a flow reactor configuration that enables continuous removal of the solid precipitate through filtration devices integrated into the flow system, preventing line clogging while maintaining the catalytic function
Solution Approach 2:
A solid filtration medium or membrane is introduced as an intermediary component in the flow reactor system to capture and remove the amine hydrochloride precipitate, allowing the reaction to proceed with high productivity while maintaining flow stability
2Productivity
If a flow reactor is used to achieve high-speed mixing and precise temperature control, then reaction efficiency is improved, but the precipitation of solid amine hydrochloride causes line clogging
Solution Approach 1:
The solid amine hydrochloride by-product is continuously extracted from the reaction mixture using integrated filtration devices in the flow reactor system, maintaining high reaction efficiency while preventing line clogging and ensuring operational reliability
Solution Approach 2:
Filtration capability is built into the flow reactor system in advance, so that when amine hydrochloride precipitates, it is immediately captured and removed, preventing line clogging before it can occur
3Adaptability or versatility
If common organic solvents are used in the reaction, then solvent availability is improved, but amine hydrochloride has low solubility and precipitates out
Solution Approach 1:
The amine hydrochloride precipitate is continuously removed from the reaction system using flow reactor filtration, enabling the use of common organic solvents with limited solubility for amine hydrochloride, thus expanding solvent selection while maintaining reaction reliability
Solution Approach 2:
The solubility parameter is effectively changed by introducing continuous solid removal through filtration, allowing the use of solvents that would normally result in precipitation, thereby expanding solvent adaptability while controlling precipitation issues
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 enables stable and efficient production of organic compounds in flow reactors by preventing line occlusion and expanding the solvent options, enhancing the scalability and flexibility of chlorine-containing compound reactions.
Implementation Method 1
the reaction is often accelerated by using a tertiary amine as a catalyst
Implementation Method 2
a solid of the amine hydrochloride precipitates out of a generally often used general-purpose solvent
Data Source
AI summary
The present disclosure provides a reaction of a chlorine-containing compound using a flow reactor which is less restricted by a solvent to be used. In the present disclosure, an organic compound is produced by supplying a reaction substrate having at least one functional group which can react with chlorine and is selected from the group consisting of hydroxy group, a thiol group, an amino group, a carboxyl group, a thiocarboxyl group, and an acid amide group, and a chlorine-containing compound to a flow reactor together with a trialkyl amine having 9 to 40 carbon atoms and an organic solvent, and allowing the reaction substrate and the chlorine-containing compound to react with each other.