scholarly journals Lignosulfonate, anionic surfactants and their mixtures influence on water solutions surface tension and zinc concentrate pressure leaching

2019 ◽  
Vol 525 ◽  
pp. 012023 ◽  
Author(s):  
E B Kolmachikhina ◽  
E A Ryzhkova ◽  
D V Dmitrieva ◽  
V V Sviridov ◽  
S S Naboichenko
Keyword(s):  
Surface Tension ◽  
Anionic Surfactants ◽  
Pressure Leaching ◽  
Water Solutions ◽  
Zinc Concentrate

scholarly journals STUDY OF LIGNOSULFONATE, ANIONIC SURFACTANTS AND THEIR MIXTURE EFFECT ON ZINC CONCENTRATE PRESSURE LEACHING

2018 ◽  
Vol 22 (8) ◽  
pp. 143-150
Author(s):  
Elvira Kolmachikhina ◽  
◽  
Ekaterina Ryzhkova ◽  
Darya Dmitrieva ◽  
Kirill Vakula ◽  
...  
Keyword(s):  
Anionic Surfactants ◽  
Pressure Leaching ◽  
Mixture Effect ◽  
Zinc Concentrate

Aqueous Solution of Anionic Surfactants Mixed with Soils Show a Synergistic Reduction in Surface Tension

2009 ◽  
Vol 209 (1-4) ◽  
pp. 3-13 ◽  
Author(s):  
Kerstin Hagenhoff ◽  
Jingfeng Dong ◽  
Babur Z. Chowdhry ◽  
Stephen Anthony Leharne
Keyword(s):  
Aqueous Solution ◽  
Surface Tension ◽  
Anionic Surfactants

scholarly journals Physicochemical, thermodynamic and thermal properties of linalyl acetate-ethanol-water system

2020 ◽  
Vol 207 ◽  
pp. 01022
Author(s):  
Vanya Gandova ◽  
Stanislava Tasheva ◽  
Krasimira Dobreva ◽  
Vanya Prodanova-Stefanova ◽  
Krasimira Marinova ◽  
...  
Keyword(s):  
Surface Tension ◽  
Thermal Properties ◽  
Linear Regression ◽  
Regression Model ◽  
Linear Regression Model ◽  
Water System ◽  
Linalyl Acetate ◽  
Water Solutions ◽  
Experimental Surface ◽  
The Stability

Some physicochemical, thermodynamic and thermal properties of linalyl acetate - ethanol - water solutions with different ethanol concentrations (70%, 75%, 80%, 85%, 90%, and 95%) in three ratios (1:5, 1:6, and 1:7) were determined. The properties were calculated to describe the stability of the system. Multiply linear regression model was obtained for surface tension prediction. Good correlation was observed between calculated and experimental surface tension values.

Properties of ethanol and ethanol-water solutions – Tables and Equations

2010 ◽  
pp. 607-613 ◽  
Author(s):  
Pavel Kadlec ◽  
Svatopluk Henke ◽  
Zdenek Bubník
Keyword(s):  
Thermal Conductivity ◽  
Surface Tension ◽  
Heat Capacity ◽  
Vapor Pressure ◽  
Chemical Properties ◽  
Normal Pressure ◽  
Pure Ethanol ◽  
Water Solutions ◽  
Pressure Surface ◽  
Physico Chemical

This paper deals with the physico-chemical properties of ethanol and ethanol-water solutions. The data of ethanol properties and its water solutions, which were obtained from literature, are presented in the form of Equations and Tables.Extended properties include data for pure ethanol (density, vapor pressure, surface tension, viscosity, molar and specific heat capacity, enthalpy of evaporation, thermal conductivity and static relative permittivity) and tabled data for ethanol-water solutions (0–100% ethanol) as well: concentrative properties, surface tension and thermal conductivity at20 °C, density, viscosity, boiling point and equilibrium liquid-vapor at normal pressure.

Article

1998 ◽  
Vol 76 (2) ◽  
pp. 152-157
Author(s):  
Catherine E Drennan ◽  
Rachelle J Hughes ◽  
Vincent C Reinsborough ◽  
Oladega O Soriyan
Keyword(s):  
Surface Tension ◽  
Critical Micelle Concentration ◽  
Mixed Micelles ◽  
Anionic Surfactants ◽  
Sodium Dodecyl ◽  
Surfactant Solution ◽  
Kinetic Studies ◽  
Stopped Flow ◽  
Dilute Solution ◽  
Surfactant Micelles

Kinetic studies through stopped-flow spectroscopy were undertaken in the dilute solution range of anionic surfactants where pronounced rate enhancement or inhibition of Ni2+-ligand complexations is often observed at surfactant concentrations much below the critical micelle concentration (CMC). The results are interpreted in terms of Ni-surfactant micelles as the agents responsible for the rate changes in dilute surfactant solution. At higher surfactant concentrations these micelles are transformed into mixed micelles (counterion and size changes), eventually becoming normal surfactant micelles close to the CMC. Surface tension, dye solubility, conductivity, and fluorescent probe investigations support this interpretation.Key words: micellar catalysis, sodium dodecyl sulfate, micelles, critical micelle concentration, premicelles, Ni2+-ligand complexations.

scholarly journals Pattern Formation upon Evaporation of Sessile Droplets of Polyelectrolyte/Surfactant Mixtures on Silicon Wafers

2021 ◽  
Vol 22 (15) ◽  
pp. 7953
Author(s):  
Lionel Perrin ◽  
Andrew Akanno ◽  
Eduardo Guzman ◽  
Francisco Ortega ◽  
Ramon G. Rubio
Keyword(s):  
Surface Tension ◽  
Surfactant Concentration ◽  
Chemical Nature ◽  
Anionic Surfactants ◽  
Phase Contact ◽  
Surfactant Mixtures ◽  
Diallyldimethylammonium Chloride ◽  
Coffee Ring ◽  
Three Phase ◽  
Surface Active

The formation of coffee-ring deposits upon evaporation of sessile droplets containing mixtures of poly(diallyldimethylammonium chloride) (PDADMAC) and two different anionic surfactants were studied. This process is driven by the Marangoni stresses resulting from the formation of surface-active polyelectrolyte–surfactant complexes in solution and the salt arising from the release of counterions. The morphologies of the deposits appear to be dependent on the surfactant concentration, independent of their chemical nature, and consist of a peripheral coffee ring composed of PDADMAC and PDADMAC–surfactant complexes, and a secondary region of dendrite-like structures of pure NaCl at the interior of the residue formed at the end of the evaporation. This is compatible with a hydrodynamic flow associated with the Marangoni stress from the apex of the drop to the three-phase contact line for those cases in which the concentration of the complexes dominates the surface tension, whereas it is reversed when most of the PDADMAC and the complexes have been deposited at the rim and the bulk contains mainly salt.

Sodium Lingo-Sulfonate and Sodium Dodecyl-Sulfate Mixtures Influence on Zinc Concentrate Pressure Leaching and Zinc Electro-Winning

2020 ◽  
Vol 299 ◽  
pp. 1121-1127
Author(s):  
E.B. Kolmachikhina ◽  
E.A. Ryzhkova ◽  
D.V. Dmitrieva
Keyword(s):  
High Temperature ◽  
Sodium Dodecyl Sulfate ◽  
Current Efficiency ◽  
Sodium Dodecyl ◽  
Pressure Leaching ◽  
Leaching Tests ◽  
Zinc Extraction ◽  
Zinc Surface ◽  
Dodecyl Sulfate ◽  
Zinc Concentrate

This paper is describing an investigation of sodium lingo-sulfonate and sodium dodecyl-sulfate mixtures influence on zinc concentrates high temperature oxidative pressure leaching and zinc electro-winning. For this purpose, surfactants concentration at leaching tests was varied from 200 to 800 mg∙l-1. It was established that the maximum zinc extraction (99 %) at leaching was achieved in the presence of mixture containing 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate. Therefore, this mixture can be recommended for high temperature oxidative pressure leaching of zinc concentrates. Sulfur-sulfide pellets formation also was observed at a low lingo-sulfonate concentration (200 mg∙l-1) in a mixture with sodium dodecyl-sulfate. This phenomenon can lead to emergency shut down of autoclave. It was observed that the mixture usage of 800 mg∙l-1 lignosulfonate and 200 mg∙l-1 sodium dodecyl-sulfate had no significant impact on zinc current efficiency, it was in the rage of 92-93 %. The mixture usage of 200 mg∙l-1 lignosulfonate and 600 mg∙l-1 sodium dodecyl-sulfate allowed to increase current efficiency up to 95 %. Increasing sodium dodecyl-sulfate concentration in mixtures with lignosulfonates leads to decrease of current efficiency, to formation of deep pores and defects on cathode zinc surface.

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