scholarly journals Effect of Temperature and Electrolytic Concentration on Density and Viscosity of Ethanol-Water Mixed Solvent Systems

2019 ◽  
pp. 01-05
Author(s):  
Anis Ahmed Sheikh ◽  
Syed U.K. Asema ◽  
Mohamad Asif ◽  
Shaukat Patel
Keyword(s):  
Constant Temperature ◽  
Mixed Solvent ◽  
Solvent System ◽  
Effect Of Temperature ◽  
Water Mixture ◽  
Mixed Solvent System ◽  
Solvent Interaction ◽  
Solvent Systems ◽  
Solvent Solvent

The density and Viscosity of Ethanol-Water mixed solvent systems (5%, 10%, 20% ,40% v/v ) has been determined at 298,303,308 and 313 K. The same parameters has been determined for the KCl-Ethanol-Water mixture (2%, 4%, 6%, 8%, 10% w/v)The results obtained from these determinations were discussed. The effect of temperature and KCl electrolyte on density and viscosity of mixed solvent systems and mixture has been studied. The increase in temperature of mixed solvent system results in decrease in density and Viscosity. But with the addition of KCl electrolyte in mixed solvent system results in increase in density and viscosity at constant temperature but the same parameters decrease when temperature increases. The variation of these parameters is due to solute-solvent and solvent-solvent interaction.

Lanasol dyes and wool fibres. Part I: model studies on the mechanism of dye fixation in a mixed solvent system

1998 ◽  
Vol 39 (4) ◽  
pp. 291-312 ◽  
Author(s):  
J.S. Church ◽  
A.S. Davie ◽  
P.J. Scammells ◽  
D.J. Tucker
Keyword(s):  
Mixed Solvent ◽  
Solvent System ◽  
Mixed Solvent System ◽  
Model Studies

Statistical Optimization and Kinetic Modeling of Lipase-Catalyzed Synthesis of Diacylglycerol in the Mixed Solvent System of Acetone/tert-Butanol

2021 ◽  
Vol 60 (39) ◽  
pp. 14026-14037
Author(s):  
Nurul Nadiah Abd Razak ◽  
Lai Ti Gew ◽  
Yolande Pérès ◽  
Patrick Cognet ◽  
Mohamed Kheireddine Aroua
Keyword(s):  
Kinetic Modeling ◽  
Mixed Solvent ◽  
Solvent System ◽  
Statistical Optimization ◽  
Mixed Solvent System ◽  
Tert Butanol

scholarly journals Thin Layer Chromatographic Analysis of Food Colorants from Three Morphotypes of Annatto (Bixa orellana L.)

2013 ◽  
Vol 2 (1) ◽  
pp. 7-12
Author(s):  
Hari Pada Seal ◽  
Mohammad Amdad Ali ◽  
Md Usuf Ali ◽  
Mosammat Hasina Akhter ◽  
Fowzia Sultana
Keyword(s):  
Thin Layer ◽  
Chromatographic Analysis ◽  
Mixed Solvent ◽  
Solvent System ◽  
Bixa Orellana ◽  
Solvent Extraction Method ◽  
Solvent Systems ◽  
Carrier Solvent ◽  
Thin Layer Chromatographic Analysis ◽  
Layer Chromatography

This article describes a simple solvent extraction method for the extraction of colorants from the three morphotypes such as, (Morphotype-1 (M1), Morphotype-2 (M2), and Morphotype- 3 (M3) of Annatto (Bixa orellana L.) seeds, and their separation, vivid, and qualitative demonstration by thin-layer chromatography. Several solvent systems (hexane, chloroform, acetone, ethanol, and a mixed-solvent having composition of CHCl3/C2H5OH/CH3COOH (80:2:1)) were applied for extraction of colored components. It was observed that a large portion of colorants was extracted by chloroform. Its effluent was deep brick red in color and transparent. Furthermore, various carrier solvent systems (Benzene-Ethyl acetate) were used to separate the components from the extracts. Carrier solvent system with the ratio of 7:3 was found as superior solvent for chloroform extracts. Three colored-spots were observed for all morphotypes. Among them, the first one was yellow colored having very low polarity and the second and third spots were both redbrick colored having medium and higher polarity respectively. In addition, for M1 no colorless-spot was observed in low and medium polar systems, revealing that the amount of wax and gum were minimum in the extract and superior morphotype among the three. DOI: http://dx.doi.org/10.3329/ijarit.v2i1.13987 Int. J. Agril. Res. Innov. & Tech. 2 (1): 7-12, June, 2012

Metal-Assisted Reactions. Part XXX. Control of Rates of Heterogeneously Catalyzed Transfer Hydrogenolysis through Changes in Solvent Composition

2003 ◽  
Vol 56 (5) ◽  
pp. 423 ◽  
Author(s):  
José A. C. Alves ◽  
Amadeu F. Brigas ◽  
Robert A. W. Johnstone
Keyword(s):  
Liquid Phase ◽  
Adsorption Isotherms ◽  
Mixed Solvent ◽  
Phase Transfer ◽  
Catalyst Surface ◽  
Solvent System ◽  
Solvent Composition ◽  
Phase Solubility ◽  
Mixed Solvent System ◽  
Rate Of Reaction

Adsorption isotherms in the liquid phase can be used to determine the relative strengths of adsorption of reactants and solvent at a catalyst surface. Such isotherms can then be used to indicate which type of solvent would be most suitable for a heterogeneously catalyzed reaction in the liquid-phase. Solubility in any chosen solvent is also important. As examples, rates of heterogeneously catalyzed liquid-phase transfer hydrogenolyzes of aryl tetrazolyl ethers (1) have been shown to be highly dependent on both the nature of the solvent and on the solution concentrations of the reactants. The rate of reaction can be varied from zero to a maximum and then back to zero simply by adjusting the solubility of the reductant through changes in the proportion of water in a mixed-solvent system.

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