Trap Column Dilution System Preventing Clogging
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Solution Overview
Problem
Preparative separation-purification systems using liquid chromatographs face clogging issues due to target compound deposition in trap columns, which impedes the flow of solutions.
Innovation Solution
A system that alternately supplies an eluting solvent and a diluting liquid through a trap column to capture and elute target components, with the diluting liquid preventing deposition by diluting the eluate and dissolving any deposits, using a liquid-sending system with pumps and selectors to manage solvent and diluent flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If target component is eluted from the trap column at a high concentration, then the collection efficiency is improved, but the target compound leaves deposits within the tube on the downstream side of the trap column, thereby clogging the passage
Solution Approach 1:
A diluting liquid supply passage is introduced as an intermediary element between the trap column outlet and the collection container. This intermediary supplies diluting liquid to the collection passage, preventing direct contact between high-concentration eluate and the passage walls, thereby eliminating the clogging problem while maintaining collection efficiency.
Solution Approach 2:
The concentration parameter of the eluate is dynamically changed by introducing diluting liquid. The system transitions from a high-concentration state (which causes clogging) to a controlled concentration state (which prevents deposition), allowing the target component to be collected efficiently without forming deposits in the passage.
2Reliability
If a diluting liquid is supplied into the collection passage, then the deposition of the target component in the collection passage is suppressed, but the system complexity increases due to additional passages and control mechanisms
Solution Approach 1:
The liquid-sending system is designed with multi-functionality, where a single system handles both the supply of eluting solvent to the trap column and the supply of diluting liquid to the collection passage. This integrated approach reduces the need for separate independent systems, thereby limiting the increase in overall system complexity while achieving the reliability benefit.
Solution Approach 2:
The diluting liquid is supplied in advance or concurrently with the eluate flow, before deposition can occur. This preliminary action prevents the formation of deposits rather than removing them afterward, simplifying the system requirements compared to post-cleaning mechanisms.
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
Effectively prevents clogging by maintaining a stable flow through the system, allowing for efficient collection and purification of target components without passage blockages.
Implementation Method 1
passing a solution containing a target component through a trap column to capture the target component in the trap column
Implementation Method 2
passing an eluting solvent through the trap column to elute the target component captured in the trap column
Implementation Method 3
supplying into the collection passage a diluting liquid for lowering the concentration of the target component in the eluate
Data Source
AI summary
In a preparative separation-purification system for passing a solution containing a target component through a trap column to capture the target component in the column, and for subsequently passing an eluting solvent through the column to elute the captured component and collect it in a container, a dilution passage is merged with a collection passage for sending an eluate from the outlet end of the trap column to the collection container, and a diluting liquid is intermittently introduced through the dilution passage into the collection passage. The diluting liquid lowers the concentration of the target component in the eluate and impedes the deposition of the target component. Thus, clogging of the passage due to the deposition of the target component eluted from the trap column is effectively prevented.