Solvent extraction–sequential injection without segmentation and phase separation based on the wetting film formed on a Teflon tube wall

The Analyst ◽  
1996 ◽  
Vol 121 (5) ◽  
pp. 601-606 ◽  
Author(s):  
Yongyi Luo ◽  
Rashed Al-Othman ◽  
Jaromir Ruzicka ◽  
Gary D. Christian
Keyword(s):  
Phase Separation ◽  
Solvent Extraction ◽  
Tube Wall ◽  
Sequential Injection ◽  
Teflon Tube ◽  
Wetting Film

scholarly journals Durability and Recoverability of Soft Lithographically Patterned Hydrogel Molds for the Formation of Phase Separation Membranes

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 108
Author(s):  
Asad Asad ◽  
Masoud Rastgar ◽  
Hadi Nazaripoor ◽  
Mohtada Sadrzadeh ◽  
Dan Sameoto
Keyword(s):  
Phase Separation ◽  
Solvent Extraction ◽  
Cold Treatment ◽  
Porous Membranes ◽  
Separation Processes ◽  
Separation Membranes ◽  
Membrane Fabrication ◽  
Phase Separation Process ◽  
Continuous Use ◽  
Recovery Result

Hydrogel-facilitated phase separation (HFPS) has recently been applied to make microstructured porous membranes by modified phase separation processes. In HFPS, a soft lithographically patterned hydrogel mold is used as a water content source that initiates the phase separation process in membrane fabrication. However, after each membrane casting, the hydrogel content changes due to the diffusion of organic solvent into the hydrogel from the original membrane solution. The absorption of solvent into the hydrogel mold limits the continuous use of the mold in repeated membrane casts. In this study, we investigated a simple treatment process for hydrogel mold recovery, consisting of warm and cold treatment steps to provide solvent extraction without changing the hydrogel mold integrity. The best recovery result was 96%, which was obtained by placing the hydrogel in a warm water bath (50 °C) for 10 min followed by immersing in a cold bath (23 °C) for 4 min and finally 4 min drying in air. This recovery was attributed to nearly complete solvent extraction without any deformation of the hydrogel structure. The reusability of hydrogel can assist in the development of a continuous membrane fabrication process using HFPS.

Flow-injection solvent extraction with and without phase separation

2001 ◽  
Vol 447 (1-2) ◽  
pp. 211-217 ◽  
Author(s):  
A. Alonso ◽  
M.J. Almendral ◽  
M.J. Porras ◽  
Y. Curto ◽  
C. Garcı́a de Marı́a
Keyword(s):  
Phase Separation ◽  
Solvent Extraction ◽  
Flow Injection

Microfluidic Solvent Extraction of Copper for Mineral Processing

2009 ◽  
Author(s):  
Jingfang Zhou ◽  
Craig Priest ◽  
Rossen Sedev ◽  
John Ralston ◽  
Arata Aota ◽  
...  
Keyword(s):  
Phase Separation ◽  
Solvent Extraction ◽  
Microfluidic Chip ◽  
Mineral Processing ◽  
Silica Particles ◽  
Transfer Efficiency ◽  
Instantaneous Phase ◽  
High Particle ◽  
Conventional Extraction ◽  
Conventional Methods

Solvent extraction of copper has been explored in a microfluidic chip (μSX). The transfer efficiency and rate of phase separation in μSX were compared to that achieved using conventional methods (bulk dispersion) both with and without fine silica particles present. Using the microfluidic approach, transfer efficiency was comparable to that achieved in conventional extraction. Phase separation is slow or totally arrested in bulk extraction, while instantaneous phase separation was achieved in μSX, even at high particle concentrations.

Sequential Injection Photometric Determination of Molybdenum Using Organic Wetting Film Extraction

1997 ◽  
Vol 55 (3) ◽  
pp. 392-398 ◽  
Author(s):  
Shigenori Nakano ◽  
Yongyi Luo ◽  
David Holman ◽  
Jaromir Ruzicka ◽  
Gary D. Christian
Keyword(s):  
Photometric Determination ◽  
Sequential Injection ◽  
Wetting Film
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