scholarly journals Process intensification in Desalination operation in mesoscale systems

2022 ◽  
Author(s):  
Abir Chakravorty
Keyword(s):  
Solvent Extraction ◽  
Theoretical Approach ◽  
Sea Water ◽  
Separation Efficiency ◽  
Energy Requirement ◽  
Process Intensification ◽  
Infrared Heating ◽  
Extraction Column ◽  
Air Suspension ◽  
Time Of Operation

Development of desalination technologies has been identified as vital to fulfilling future water demand. Directional solvent extraction is one of the promising membrane-less seawater desalination method. Membrane based desalination technologies incur a higher cost and are subjected to fouling after certain period of time of operation and needs regular maintenance and monitoring. It is believed that, overcoming these drawbacks is possible by working in the millimeter scale through the incorporation of pulsatile flow and air damper. This work presents a theoretical approach designed for a certain nominal length of an air damper, placed on the top of the extraction column, with the flow in the desalination unit being semi pulsatile combined with secondary pulsation generated due to air suspension during solvent extraction applied for desalination operation. Henceforth a theoretical approach based on the above stated parameters, it is found theoretically that with increase in flow pulsation amplitude and frequency the extracted salt concentration in solvent increases. The application of infra red radiation in preheating section with the help of a infrared heating device is the crucial part of DSE process, cooling is planned to achieve via a heat exchanger or atmospheric cooling. The total exergy and energy calculations will be conducted to see the energy requirement for the process. It is planned to calculate the salt separation efficiency of sea water (on the basis of WHO guidelines) to fresh water, alongwith flow rate and processing time.

scholarly journals Effect of Plate Wettability on Dispersed-Phase Holdup in a Pulsed Disc-and-Doughnut Solvent Extraction Column

2017 ◽  
Vol 35 (7) ◽  
pp. 573-585 ◽  
Author(s):  
Teobaldo Grabin ◽  
Kathryn H. Smith ◽  
Kathryn A. Mumford ◽  
Yong Wang ◽  
Geoffrey W. Stevens
Keyword(s):  
Solvent Extraction ◽  
Extraction Column ◽  
Dispersed Phase

scholarly journals Molecular Imprinted of Nylon 6 for Selective Separation of Procaine by Solid-Phase Extraction

2021 ◽  
Vol 21 (6) ◽  
pp. 1505
Author(s):  
Muhammed Emad Abood ◽  
Sumayha Muhammed Abbas
Keyword(s):  
Solid Phase Extraction ◽  
Recovery Rate ◽  
Separation Efficiency ◽  
Solid Phase ◽  
Nylon 6 ◽  
Extraction Column ◽  
Phase Extraction ◽  
Mixed Solution ◽  
Imprinted Polymer ◽  
Drug Compound

The study is based on the selective binding ability of the drug compound procaine (PRO) on a surface imprinted with nylon 6 (N6) polymer. Physical characterization of the polymer template was performed by X-ray diffraction and DSC thermal analysis. The imprinted polymer showed a high adsorption capacity to trap procaine (237 µg/g) and excellent recognition ability with an imprinted factor equal to 3.2. The method was applied to an extraction column simulating a solid-phase extraction to separate the drug compound in the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate more than the presence of tinoxicam and nucleosimide separately and in a mixture of them with a recovery rate of more than 82%. Separation efficiency and excellent selectivity for procaine were ensured using a mixed solution injected into an HPLC technique consisting of a C18 column with a mobile phase mixture of water-acetonitrile (75:25) at pH 3.3. The study of drug control using an imprinted polymer with procaine compound showed that the complete drug release process is faster at pH1 in a maximum period of 80 min. The proposed method was successfully applied on some of the available pharmaceuticals, and it showed high selectivity for the separation of PRO, RE % was < 1.18, and RSD was less than 0.447.

The selectivity of diglycolamide (TODGA) and bis-triazine-bipyridine (BTBP) ligands in actinide/lanthanide complexation and solvent extraction separation – a theoretical approach

2015 ◽  
Vol 44 (6) ◽  
pp. 2657-2666 ◽  
Author(s):  
Jerzy Narbutt ◽  
Artur Wodyński ◽  
Magdalena Pecul
Keyword(s):  
Charge Transfer ◽  
Solvent Extraction ◽  
Theoretical Approach ◽  
Extraction Separation

Charge transfer from the ligand to valence hybrid (mainly d) metal orbitals nearly equally stabilizes cationic EuIII and AmIII TODGA complexes.

Purification and characterization of the indicator calmagite

1981 ◽  
Vol 59 (16) ◽  
pp. 2539-2542 ◽  
Author(s):  
Byron Kratochvil ◽  
James Nolan ◽  
Frederick F. Cantwell ◽  
Robert B. Fulton
Keyword(s):  
Solvent Extraction ◽  
Azo Dye ◽  
Ion Pair ◽  
Ionization Constants ◽  
Extraction Column ◽  
Partition Chromatography ◽  
Purification And Characterization ◽  
Acid Base ◽  
Layer Chromatography

A scheme for the purification of the azo dye calmagite is described which involves solvent extraction, column partition chromatography, and adsorption chromatography on a nonpolar adsorbent. The final product, analyzed by thin-layer chromatography and by acid–base and ion-pair titrations, is of >99% purity. Molar absorptivities and acid ionization constants are reported for the conjugate species.

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