Continuous Flow Reactor with Pressure-Controlled Volume Adjustment
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Solution Overview
Problem
Existing continuous flow reactors face challenges in managing mass and volume changes during reactions, leading to inefficiencies and reduced yields, particularly in solid phase peptide synthesis, due to issues with pressure and reagent wastage, and difficulties in scaling up.
Innovation Solution
A continuous flow reactor with a moveable wall controlled by a drive system and a controller that adjusts pressure and volume dynamically, using sensors to maintain a set-point pressure range and adjust volume based on fluid pressure differentials, ensuring optimal reaction conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous flow reactor uses large excesses of reagents and wash solvents to ensure complete reaction in a non-packed bed configuration, then reaction completeness is improved, but reagent waste and operational cost increase significantly
Solution Approach 1:
The reactor employs a packed bed configuration where the solid support forms a porous matrix that allows reagents to flow through while maintaining intimate contact with the reaction sites. This porous structure enables complete reactions with stoichiometric or near-stoichiometric amounts of reagents, eliminating the need for large excesses and thereby reducing reagent waste significantly.
Solution Approach 2:
The solid support is pre-loaded with reactive groups or catalysts before the continuous flow reaction begins. This preliminary preparation ensures that reagents flowing through the reactor can immediately engage in complete reactions without requiring excess amounts, thus improving reaction completeness while minimizing reagent consumption.
2Adaptability or versatility
If a pre-loaded end of the reactor slides relative to other parts to allow volume increase during synthesis, then reaction volume adaptability is improved, but pressure control accuracy and data measurement precision deteriorate due to friction and sealing issues
Solution Approach 1:
The reactor incorporates a moveable wall that can dynamically adjust the reaction chamber volume in response to changing reaction conditions. This dynamic adjustment capability allows the reactor to accommodate volume changes during synthesis while maintaining accurate pressure control through feedback mechanisms, thus achieving both volume adaptability and measurement precision without the friction and sealing problems of sliding mechanisms.
Solution Approach 2:
The reactor system includes pressure sensors and control mechanisms that continuously monitor pressure conditions and adjust the moveable wall position accordingly. This feedback control ensures accurate pressure measurement and control even as the reaction volume changes, eliminating the measurement precision problems associated with simple sliding mechanisms.
3Loss of time
If batch reactors are used for solid phase peptide synthesis, then reaction time is reduced and consistent results are achieved, but reaction yield is insufficient due to repeated coupling steps magnifying losses
Solution Approach 1:
The reactor transitions from batch processing to continuous flow processing, where reagents continuously flow through the packed bed containing the solid support. This continuous action allows multiple coupling steps to occur simultaneously in different zones of the reactor, maintaining consistent results while achieving high yields by preventing material losses that accumulate in repeated batch operations.
Data Source
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AI summary
A continuous flow reactor, a method of performing a continuous flow reaction, and a method of controlling a moveable wall of a reaction chamber of a continuous flow reactor. The reactor comprising: an inlet; an outlet; and a reaction chamber, between the inlet and the outlet and providing a flow path therebetween, the reaction chamber having a moveable wall; the reactor further comprising: a pressure sensor configured to monitor a fluid pressure in the continuous flow reactor; and a controller, operable to adjust the position of the moveable wall, and thereby change a volume of the reaction chamber, based on the monitored fluid pressure.