Extraction separation of the components of leach liquors of batteries

Theoretical Foundations of Chemical Engineering - Waste batteries contain toxic metals (Pb, Ni, Zn, Fe, etc.) in high concentrations. In order to prevent harmful effects on human health and...     

Extractive denitrogenization of liquid model fuel using polyethylene glycol methyl ether 350

In the present study, we studied the effectiveness of the water-soluble polymer polyethylene glycol methyl ether 350 (PEG ME-350) on the extraction of nitrogen-containing heterocyclic compounds—quinoline and indole—from n-hexane. The dependences of the quantitative characteristics of the extraction of N-compounds on the contact time of the phases, the content of PEG ME-350 in the n-hexane–water system, the initial concentration of nitrogen-containing heterocyclic compounds in the organic phase, and the volumetric ratio of the phases were obtained. It has been established that PEG ME-350 is an effective extractant in the process of stepwise extraction of quinoline and indole, and the mechanisms of their extraction have also been proposed and proven. The results can be further used in the purification of light hydrocarbon fractions from nitrogen-containing heterocyclic compounds.     

Column miniextractors with a vibrating nozzle

Vibrating minicolumns with low and high-frequency drives are suggested for the laboratory investigation of extraction processes. It has been experimentally determined that these apparatuses of up to 1 m in height and 20–50 ml in volume, depending on the physicochemical properties of fluid systems, can provide an efficiency of mass exchange corresponding to 5–10 theoretical steps.     

Pulsed cyclic device for liquid countercurrent chromatography

Theoretical Foundations of Chemical Engineering - A new apparatus for the chromatographic separation of liquid mixtures is investigated. The apparatus contains a number of vertical columns...     

Extraction of uranyl,ytterbium, and lanthanum nitrates in a three-compartment multiphase extractor

Multiphase extraction and separation processes in a three-chamber apparatus are analyzed. Results of experimental investigations of the extraction and separation of uranium and rare-earth elements in such extractors are presented.     

Extraction of Thiophene with Methyl Ether of Polyethylene Glycol 350

Theoretical Foundations of Chemical Engineering - The efficiency of polyethylene glycol methyl ether 350 (PEG ME-350) in the process of extracting thiophene from model motor fuel has been studied...     

Extraction of Lactic Acid Using the Polyethylene Glycol–Sodium Sulfate–Water System

Theoretical Foundations of Chemical Engineering - An extraction system based on polyethylene glycol 1500 and sodium sulfate for extracting lactic acid from aqueous solutions is proposed. The...     

A Deep Eutectic Solvent Based on Choline Chloride and Sulfosalicylic Acid: Properties and Applications

Theoretical Foundations of Chemical Engineering - The results of studying the physical properties of a deep eutectic solvent based on choline chloride and sulfosalicylic acid have been presented. A...     

Liquid–Liquid Equilibrium And Extraction Capacity of the PPG 425–NaNO3–H2O System

Theoretical Foundations of Chemical Engineering - In this work, we study the liquid–liquid phase equilibrium for a new extraction system with polypropylene glycol 425 (PPG 425) and sodium...     

Dynamics of Mass Transfer through the Interface between Immiscible Liquids under the Resonance Effect of Ultrasound

Theoretical Foundations of Chemical Engineering - The specific features of the resonance behavior of the radial vibrations of a droplet of liquid placed into an immiscible liquid have been...