Integrated Mobile Phase Preheating in Preparative LC Column Ovens

Solution Overview

Problem

Chromatography systems at semi-preparative and preparative scales require separate and dedicated mobile phase heaters, adding cost and complexity, and elevated temperature conditions are seldom used due to this setup.

Innovation Solution

An integrated mobile phase pre-heating apparatus within a liquid chromatography column oven uses a heat transfer assembly with thermally conductive materials to pre-heat the mobile phase before injection, utilizing a single heat source for both conductive and convective heating, minimizing tubing length and eliminating the need for a separate heater.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a separate dedicated mobile phase heater is used, then mobile phase pre-heating capability is achieved, but device complexity and cost increase

Engineering Contradiction:

Improvemobile phase temperatureVSAvoidsystem complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The patent merges the mobile phase pre-heating function with the existing column oven by integrating a heat transfer assembly that includes tubing positioned within the column oven chamber. This allows the column oven to simultaneously heat both the column and the mobile phase, eliminating the need for a separate dedicated heater and reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The column oven is designed to perform multiple functions: heating the chromatography column and pre-heating the mobile phase simultaneously. The heat transfer assembly with its strategically positioned tubing enables the single heating source to serve dual purposes, improving system efficiency and reducing component count.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If a separate dedicated mobile phase heater is used, then mobile phase pre-heating capability is achieved, but cost increases

Engineering Contradiction:

Improvemobile phase temperatureVSAvoidsystem cost

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent merges the mobile phase pre-heating function with the existing column oven by integrating a heat transfer assembly that includes tubing positioned within the column oven chamber. This allows the column oven to simultaneously heat both the column and the mobile phase, eliminating the need for a separate dedicated heater and reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The column oven is designed to perform multiple functions: heating the chromatography column and pre-heating the mobile phase simultaneously. The heat transfer assembly with its strategically positioned tubing enables the single heating source to serve dual purposes, improving system efficiency and reducing component count.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Use of energy by moving object

If elevated temperature conditions are used, then heat transfer efficiency improves, but system complexity increases

Engineering Contradiction:

Improveheat transfer efficiencyVSAvoidsystem complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent merges the mobile phase pre-heating function with the existing column oven by integrating a heat transfer assembly that includes tubing positioned within the column oven chamber. This allows the column oven to simultaneously heat both the column and the mobile phase, eliminating the need for a separate dedicated heater and reducing overall system complexity.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mobile phase is pre-heated before entering the column using the heat transfer assembly, ensuring that the mobile phase reaches the desired temperature prior to chromatography. This preliminary heating action improves subsequent heat transfer efficiency and reduces the energy burden on the column heating system.

Inventive Principle:

Principle #10Preliminary action

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 integration reduces system cost and complexity while enabling elevated temperature conditions, improving heat transfer and reducing extra column band broadening, facilitating efficient semi-preparative and preparative applications.

Implementation Method 1

uses a heat transfer assembly with thermally conductive materials to pre-heat the mobile phase before injection

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

utilizing a single heat source for both conductive and convective heating

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS20250334553A1Liquid Chromatography Integrated Mobile Phase Pre-Heating Apparatus and Associated Systems and Methods

Publication Date: 2025.10.30 CEM CORP

AI summary

A liquid chromatography column oven capable of heating a mobile phase at a preparative scale prior to sample injection in the mobile phase can include a heat source configured to generate heat; and a heat transfer assembly. The heat transfer assembly can include a heat transfer structure formed of a thermally conductive material in a conductive heat transfer relationship with the heat source and including a recessed pathway in a surface of the heat transfer structure. The heat transfer assembly can further include tubing also formed of a thermally conductive material. A first portion of an exterior surface of the tubing is in a conductive heat transfer relationship with the recessed pathway of the heat transfer structure, and a second portion of the exterior surface of the tubing is in a conductive heat transfer relationship with the heat source.