scholarly journals Comparison of various column packing materials efficiency for hydrocarbons and aqueous mixtures

2019 ◽  
Vol 33 (2) ◽  
pp. 183-190
Author(s):  
Jiří Zbytovský ◽  
Tomáš Sommer ◽  
Martin Zapletal ◽  
Jiří Trejbal
Keyword(s):  
Acetic Acid ◽  
Aqueous Solutions ◽  
Binary Mixtures ◽  
Separation Efficiency ◽  
Reflux Ratio ◽  
Aqueous Mixtures ◽  
Distillation Columns ◽  
Future Design ◽  
Relative Separation ◽  
Column Packings

The efficiency of industrial column packings is commonly tested by standard hydrocarbon mixtures. However, a reduced efficiency value is often observed, particularly during distillation of aqueous mixtures. In this paper, distillation experiments with various binary mixtures were carried out on different column packings to evaluate relative separation efficiencies of mixtures for each packing material. Each of the binary mixtures, which comprised heptane–methylcyclohexane, ethanol–water, morpholine–water, and acetic acid–water, was distilled under atmospheric pressure and total reflux ratio on column packings that were made of PTFE, ceramic, zirconium metal, and inox steel 316. According to the results, aqueous solutions of morpholine and acetic acid generally exhibited low relative separation efficiency (in comparison with standard mixture of heptane–methylcyclohexane), ranging between 40 % and 80 %. The highest relative efficiencies were observed with packings made of steel and ceramic. These observations will be useful for the future design of distillation columns, especially for aqueous solutions.

Valorization of a natural residue (sawdust) as adsorbent to remove the acetic acid in aqueous solutions

2015 ◽  
Vol 56 (10) ◽  
pp. 2731-2738 ◽  
Author(s):  
Kamel Rida ◽  
Atika Bouanika ◽  
Meriem Boudellal ◽  
Ali Boukhemkhem
Keyword(s):  
Acetic Acid ◽  
Aqueous Solutions

scholarly journals Molecular Interactions of First and Second Tier Dendrimers, Anticancer Molecules, Analyzed with Densities and Viscosities of Their Aqueous Mixtures

2012 ◽  
Vol 27 ◽  
pp. 46-52 ◽  
Author(s):  
Man Singh ◽  
Ajaya Bhattarai ◽  
R. K. Kale ◽  
Shalini Gutpa ◽  
Sujeet Kumar Chatterjee ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Molecular Interactions ◽  
Aqueous Mixtures ◽  
Second Tier

Densities and viscosities of Tridiethymalonatetriazine (2,4,6) (TDEMTA) 1st (G1) and Hexadiethylmalonatetriazine (2,4,6) (HDEMTA) 2nd (G2) tier dendrimers for 0.62 to 10 mg % aqueous solutions are reported at 298.15 K and 303.15 K temperatures. Their data were compared with those of Trichlorotriazine (TCT), Triacetotrizine (TAT) and Trihydroxytrizine (THT) used as markers in the study. The densities for G2 are higher values than of G1 but both the dendrimers showed higher densities than those of the solvent with stronger heteromolecular forces due to stronger solvation and Intramolecular multiple force theory (IMMFT).DOI: http://dx.doi.org/10.3126/jncs.v27i1.6440 J. Nepal Chem. Soc., Vol. 27, 2011 46-52Uploaded date: 16 July, 2012

scholarly journals Effect of Two Liquid Phases on the Separation Efficiency of Distillation Columns

2013 ◽  
Vol 03 (01) ◽  
pp. 1-8 ◽  
Author(s):  
Gardênia Marinho Cordeiro ◽  
Stephanie Rolim Dantas ◽  
Luís Gonzaga Sales Vasconcelos ◽  
Romildo Pereira Brito
Keyword(s):  
Separation Efficiency ◽  
Distillation Columns ◽  
Liquid Phases

scholarly journals Synthesis of Mn(II)-containing paratungstate B from aqueous solutions acidified by acetic acid

2021 ◽  
pp. 39-48
Keyword(s):  
Thermal Analysis ◽  
Acetic Acid ◽  
Aqueous Solutions ◽  
Equilibrium Constants ◽  
Background Electrolyte ◽  
Equilibrium Processes ◽  
Transformation Processes ◽  
Paratungstate B ◽  
Solution Acidity ◽  
Tungstate Anion

The method of pH-potentiometric titration and mathematical simulation were used to study the equilibrium processes in aqueous solutions of the WO42––CH3COOH–H2O system in the acidity range Z=(CH3COOH)/(Na2WO4)=0.8–1.7 at СW=0.01 mol L–1 and T=2980.1 K, a constant ionic strength being maintained by sodium nitrate as a background electrolyte ((NaNO3)=0.10 mol L–1). We developed the models of polyoxotungstate anions formation and the equilibrium transformation processes, which adequately describe experimental pH vs. Z dependences. It was found that acetic acid using to create the solution acidity that is necessary for the formation of isopoly tungstate anion contributes only to the formation of protonated paratungstate B anions Нх[W12O40(ОН)2](10–х)– (where x=0–4). We calculated the logarithms of the concentration equilibrium constants of the polyanion formation and plotted the distribution diagrams. Double sodium-manganese(II) paratungstate B Na8(H2O)28Mn(H2O)2[H2W12O42]4H2O was synthesized at Z=1.00 to confirm the results of the mathematical modeling. The chemical composition of the prepared salt was established by chemical elemental analysis, thermal analysis, FTIR spectroscopy, and single crystal X-ray analysis. The stepwise process of salt dehydration was studied by means of differential thermal analysis.

scholarly journals Measurement and Prediction of Densities of Ternary Aqueous Mixtures Involving Sodium Polyacrylate

2004 ◽  
Vol 4 (1) ◽  
pp. 64
Author(s):  
Z. A. Noor Fadzlina ◽  
T. T. Teng ◽  
M. Abdul Rahman
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Percentage Error ◽  
Sodium Polyacrylate ◽  
Aqueous Systems ◽  
Aqueous Mixtures ◽  
Density Prediction ◽  
Density Values ◽  
Good Agreement

The densities of the binary aqueous solutions of sodium polyacrylate (NaPM) at 20°C, 25°C, and 300C up to 0.17 m and LiCI at 25°C and 300C up to 3.13 m were measured using a vibrating tube digital densitimeter. The measured experimental data were then fitted to the polynomial d = do + IA;m'. The densities of the ternary aqueous systems NaPM-NaCI, NaPM-LiCI, and NaPM-sucrose were also =1 measured from 20°C to 30°C. The isopycnotic equation, Imi / moi was used to predict the densities of the ternary aqueous systems mentioned. The results show that predicted and observed density values are in good agreement. The overall percentage error of density prediction for the system NaPM-NaCI-H20 is 0.067. For the system NaPM-LiCI-HP,the overall percentage error is 0.074; and, for the system NaPM-sucrose-H20, the overall percentage error is 0.065.

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