Method for counter-current liquid-liquid extraction in sub-millimetre conduit

JP2023093389A5Pending Publication Date: 2025-12-01COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
0 Cites 0 Cited by

Patent Information

Application Number
JP2022202894
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2021-12-22
Filing Date
2022-12-20
Publication Date
2025-12-01

AI Technical Summary

Technical Problem

Existing liquid-liquid extraction methods in sub-millimeter conduits face challenges in achieving efficient countercurrent extraction due to limitations in membrane performance and the difficulty in maintaining liquid phase separation, especially with miniaturization, leading to reduced extraction efficiency and increased pressure differentials.

Method used

A method involving alternating pressure gradients to induce visco-inertial and visco-capillary flows in sub-millimeter conduits, displacing droplet streams of immiscible liquids in countercurrent fashion, ensuring stable interface maintenance and enhanced surface exchange.

Benefits of technology

This method achieves high extraction performance with stable liquid phase separation and increased surface area-to-volume ratio, minimizing mechanical complexity and pressure differentials, thus optimizing miniaturized extraction efficiency.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

To provide a method for counter-current liquid-liquid extraction in a sub-millimeter conduit.SOLUTION: The method is implemented from an initial liquid drop stream in a conduit. The initial liquid drop stream is constituted of alternating drops of a first liquid (LB) and a second liquid (LNM) less wetting than the first liquid and immiscible with the first liquid, one of the two liquids comprising a component to be extracted toward the other of the two liquids. The method comprises the steps of: (a) applying a first pressure gradient along the conduit to generate a visco-inertial flow displacing a first volume of drop stream according to a first gradient and generating a film of first liquid displaced along an opposite orientation to the first gradient (the film being located between the drops of second liquid and the conduit); (b) stopping the application of the first pressure gradient; (c) applying a second pressure gradient along the conduit, in the opposite orientation to the first pressure gradient applied to generate a viscous-capillary flow displacing a second volume of drop stream; and (d) stopping the application of the second pressure gradient.SELECTED DRAWING: Figure 3
Need to check novelty before this filing date? Find Prior Art