A Comparative Study of Non-ionic Detergent Adsorption by Radiotracer, Spectrophotometric and Surface Tension Methods

1955 ◽  
Vol 59 (4) ◽  
pp. 362-366 ◽  
Author(s):  
Lun Hsiao ◽  
H. N. Dunning
Keyword(s):  
Surface Tension ◽  
Comparative Study ◽  
Ionic Detergent ◽  
Tension Methods

Effects of Non-Ionic Surfactant on the Deep Temperature Flotation Agents of Hematite

2012 ◽  
Vol 538-541 ◽  
pp. 2354-2357 ◽  
Author(s):  
Xiao Jun Jiang ◽  
Yun Jin Wang ◽  
Hong Bo Xu ◽  
Jian Wang
Keyword(s):  
Surface Tension ◽  
Fatty Acid ◽  
Polyethylene Glycol ◽  
Sodium Oleate ◽  
Ionic Surfactant ◽  
Low Carbon ◽  
Optimal Composition ◽  
Different Temperatures ◽  
Deep Temperature ◽  
Tension Methods

This investigation involves the effects of non-ionic surfactant materials on the industrial sodium oleate, sodium naphthenate and their mixtures at different temperatures by the surface tension methods. The effects on the critical micelle concentration (CMC) of sodium oleate were assessed by the Toween 80(T-80) presence, polyethylene glycol, polyether and other non-ionic surfactant. T-80 was proved more effective than other non-surfactant in increasing the sodium oleate CMC at same concentration. Using the optimal composition of sodium fatty acid and the surfactant can reduce the temperature of separation hematite from 43°C to 23°C, achieve the purpose of low carbon and energy saving.

Assessment of Surface Tension and Viscosity of In-Zn melt

2017 ◽  
pp. 15-19 ◽  
Author(s):  
R. P. Koirala ◽  
S. K. Yadav ◽  
B. P. Singh ◽  
I. S. Jha ◽  
D Adhikari
Keyword(s):  
Surface Tension ◽  
Thermodynamic Properties ◽  
Comparative Study ◽  
Concentration Dependence ◽  
Layered Structure ◽  
Association Model ◽  
Structure Approach ◽  
Self Association ◽  
Zn Alloy ◽  
Zn Alloys

A comparative study of the concentration dependence of surface tension and viscosity of molten In-Zn alloys at 700 K has been performed using energetics, obtained from thermodynamic analysis in the framework of self-association model. The surface tension of the alloys has been calculated from the two methods, layered structure approach and self associating mixture method, and viscosity from Moelwyn-Hughes equation and Kaptay equation. The theoretically computed results for the thermodynamic properties of the alloys are found in excellent agreement with the corresponding experimental results showing that the alloy is segregating in nature. Both surface tension and viscosity of the In-Zn alloy are found to increase with the addition of Zn atoms.The Himalayan Physics Vol. 6 & 7, April 2017 (15-19)

Comparative study of mass-conserving interface capturing frameworks for two-phase flows with surface tension

2014 ◽  
Vol 61 ◽  
pp. 37-47 ◽  
Author(s):  
Fabian Denner ◽  
Duncan R. van der Heul ◽  
Guido T. Oud ◽  
Millena M. Villar ◽  
Aristeu da Silveira Neto ◽  
...  
Keyword(s):  
Surface Tension ◽  
Comparative Study ◽  
Two Phase Flows ◽  
Two Phase ◽  
Interface Capturing

scholarly journals A tentative statistical theory of Macleod’s equation for surface tension, and the parachor

1937 ◽  
Vol 159 (897) ◽  
pp. 229-246 ◽  
Keyword(s):  
Molecular Weight ◽  
Surface Tension ◽  
Statistical Theory ◽  
Critical Temperature ◽  
Comparative Study ◽  
Intermolecular Forces ◽  
Wide Range ◽  
Internal Pressures ◽  
The Comparative Study ◽  
Reasonable Model

Macleod’s (1923) empirical formula for the surface tension σ of a liquid in equilibrium with its own vapour, namely σ = const. ( ρ liq . ─ ρ vap ) 4 , (1) where the ρ ’s are densities in g./c. c., must impress everyone with the feeling that such a simple and successful relation must have some equally simple foundation in thermodynamic or statistical theory. This feeling is only intensified when one realizes the wide use to which this formula has been put by Sugden and his followers. Sugden (1930) writes M *σ ¼ / ρ liq . ─ ρ vap . = P , (2) where M * is the (chemical) molecular weight of the substance, and calls P the parachor . The comparative study of the parachors for various liquids seems to have proved fruitful. This study is described by Sugden as the comparative study of molecular volumes at equal surface tensions, and therefore, to the best of our opportunities, at equal “internal pressures”. We need not here enquire into the precise significance (if any) of the phrase ‘‘internal pressure”. It is sufficient to recognize that the quantity P defined by (2) is in fact a constant (very nearly) for any given substance, independent of the temperature over a wide range, from the critical temperature T c downwards—and having recognized this important empirical fact, to attempt to derive it as a theorem in statistical mechanics applied to a reasonable model, and to give a formula for P in terms of molecular diameters and (or) intermolecular forces.

scholarly journals Comparative study of the main flotation frothers using a new HYDROMESS adapted technique

2014 ◽  
Vol 67 (1) ◽  
pp. 87-92 ◽  
Author(s):  
Moacir Medeiros Veras ◽  
Carlos Adolpho Magalhães Baltar ◽  
João Bosco de Araújo Paulo ◽  
José Yvan Pereira Leite
Keyword(s):  
Surface Tension ◽  
Comparative Study ◽  
Bubble Size ◽  
Drop Size ◽  
New Technique ◽  
Methyl Isobutyl ◽  
Flotation Process ◽  
Selective Action ◽  
Froth Stability ◽  
A New Technique

Stability of bubble size in the pulp zone and froth control is an important parameter for a successful flotation process. The present study compares the action of the main frothers in terms of: mean bubble size in the pulp zone, froth stability, surface-tension-lowering ability and reagent participation in flotation of a naturally hydrophobic mineral. Bubble size was determined using a new technique adapted from HYDROMESS, a device designed to measure drop size. The remaining indicators were obtained by determining surface tension and conducting flotation tests with the addition of hydrophobic (graphite) and hydrophilic (calcite) particles. The results indicate that methyl isobutyl carbinol (MIBC) is the most efficient frother in controlling coalescence, with critical coalescence concentration (CCC) reached at 20 ppm. Moreover, this frother has greater potential for selective action, since it increased calcite entrainment by only 2.3% at a concentration of 30 ppm. In flotation tests with a sample of graphite, MIBC produced higher recoveries.

scholarly journals Tomato Quality from Organic and Conventional Production in the Selected Area of Dharan, Sunsari, Nepal

2017 ◽  
Vol 5 (1) ◽  
pp. 91-97
Author(s):  
Pramod Kumar Yadav
Keyword(s):  
Surface Tension ◽  
Refractive Index ◽  
Vitamin C ◽  
Comparative Study ◽  
Storage Capacity ◽  
Tomato Quality ◽  
Conventional Production ◽  
C Value ◽  
Index Value ◽  
The Comparative Study

From the selected area of Dharan, Sunsari, Nepal, conventional and organic tomatoes were grown and tested with different parameters. Conventional tomatoes contained less value of Mg, Ca, K, Cu and Mn, but more value of Fe than organic tomatoes, where as Pb and Ni were not detected.The Zn was found to be same in both tomatoes sample. The sizes of conventional tomatoes were reportedly bigger than organic tomatoes. The viscosity and surface tension of organic tomatoes juice were reported to be higher than in conventional tomatoes juice. The refractive index value was found to be lower in conventional tomatoes juice than in organic tomatoes juice. The vitamin C value was found to be higher in conventional tomatoes juice than in organic tomatoes juice. The comparative study of color, juice containing capacity, storage capacity and firmness of organic and conventional tomatoes of Dharan,Sunsari,Nepal has also been included.Int. J. Appl. Sci. Biotechnol. Vol 5(1): 91-97

Comparative Study of the Effect of Tail Corrections on Surface Tension Determined by Molecular Simulation

2007 ◽  
Vol 111 (22) ◽  
pp. 6198-6207 ◽  
Author(s):  
Vincent K. Shen ◽  
Raymond D. Mountain ◽  
Jeffrey R. Errington
Keyword(s):  
Surface Tension ◽  
Comparative Study ◽  
Molecular Simulation
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