Study of Mass Transfer Characteristics of Membrane Extraction of p-Hydroxy Benzoic Acid Aqueous Solution Using Non-Porous Silicone Rubber Membrane

2013 ◽  
Vol 798-799 ◽  
pp. 227-230
Author(s):  
Wei Li Zhang ◽  
Sen Qiao ◽  
Ai Li Zhang ◽  
Ji Ti Zhou
Keyword(s):  
Aqueous Solution ◽  
Mass Transfer ◽  
Benzoic Acid ◽  
Silicone Rubber ◽  
Mass Transfer Process ◽  
Membrane Extraction ◽  
Rubber Membrane ◽  
System Temperature ◽  
In Series ◽  
Acid Aqueous Solution

A kind of modules with single tubular silicone rubber membranes was combined into membrane osmosis extraction for the treatment of p-hydroxy benzoic acid aqueous solution. Mass transfer process of p-hydroxy benzoic acid through membranes was studied. Based on the resistance-in-series model, the overall mass transfer coefficient (Kov) across membrane was calculated. The effects of feed liquid flow status, system temperature and additional salt on Kov were discussed, from which the mathematical model between flow status and system temperature was obtained.

scholarly journals Enhancement of Solubility and Mass Transfer Coefficient of Benzoic Acid Through Hydrotropy

2013 ◽  
Vol 15 (1) ◽  
pp. 46-50 ◽  
Author(s):  
D. Gnana Prakash ◽  
S. Thenesh Kumar ◽  
N. Nagendra Gandhi
Keyword(s):  
Mass Transfer ◽  
Benzoic Acid ◽  
Transfer Coefficient ◽  
Mass Transfer Coefficient ◽  
Enhancement Factor ◽  
Sodium Salicylate ◽  
Maximum Enhancement ◽  
Wide Range ◽  
System Temperature ◽  
Solubility Studies

The effect of hydrotropes such as sodium salicylate, sodium benzoate, and nicotinamide on the solubility and mass transfer coefficient of benzoic acid has been investigated. The solubility studies were carried out under a wide range of hydrotrope concentrations (0 to 3.0 mol/L) and different system temperatures (303K to 333K). It has been observed that the solubility and mass transfer coefficient of benzoic acid increases with an increase in hydrotrope concentration and also with system temperature. A Minimum Hydrotrope Concentration (MHC) was found essential to initiate a significant increase in the solubility and the mass transfer coefficient. The maximum enhancement factor (φs), which is the ratio of the solubility value in the presence and absence of a hydrotrope, has been determined for all sets of experimentations. The solubility of benzoic acid has been enhanced to 19.98 times in the presence of 2.5 mol/L concentration of sodium salicylate hydrotrope at 333K.The effectiveness of hydrotropes was measured in terms of Setschenow constant Ks and the highest value has been observed as 0.502 for sodium salicylate.

scholarly journals Separation and Recovery of Iodine from Aqueous Solution by Permeation and Chemical Desorption (PCD) Using a Silicone Rubber Membrane

2012 ◽  
Vol 02 (04) ◽  
pp. 508-513 ◽  
Author(s):  
Jun Sawai ◽  
Hitomi Tomizuka ◽  
Naoki Hatanaka ◽  
Tamotsu Minami ◽  
Mikio Kikuchi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silicone Rubber ◽  
Rubber Membrane ◽  
Silicone Rubber Membrane

scholarly journals Recovery of Pentachlorophenol from Aqueous Solution via Silicone Rubber Membrane

2012 ◽  
Vol 02 (03) ◽  
pp. 372-378 ◽  
Author(s):  
Jun Sawai ◽  
Ko-Ichi Sahara ◽  
Tamotsu Minami ◽  
Mikio Kikuchi
Keyword(s):  
Aqueous Solution ◽  
Silicone Rubber ◽  
Rubber Membrane ◽  
Silicone Rubber Membrane

A New Approach to Measure Diffusion Coefficients at Different Temperatures – A Simple Experiment

2008 ◽  
Vol 273-276 ◽  
pp. 789-795
Author(s):  
João M.P.Q. Delgado
Keyword(s):  
Mass Transfer ◽  
Benzoic Acid ◽  
Molecular Diffusion ◽  
Plane Surface ◽  
Mass Transfer Process ◽  
Packed Bed ◽  
Accurate Method ◽  
New Approach ◽  
Wide Range ◽  
Different Temperatures

The present work describes the mass transfer process between a moving fluid and a slightly soluble plane surface buried in a packed bed, in alignment with the direction of flow. The bed of inert particles is taken to have uniform voidage. The elliptic equation resulting from a differential mass balance was solved numerically over a wide range of the relevant parameters and the resulting values of Sherwood number are seemed to depend only of the Peclet number. Experiments measurements of mass transfer in water were performed on the dissolution of plane surfaces of 2-naphthol and benzoic acid at temperatures that differ significantly from ambient value. The soluble plane surfaces used in the experiments were made of either 2-naphthol or benzoic acid and the range of temperatures covered were 278 to 368 K, for the dissolution of 2-naphthol, and 278 to 338 K, for benzoic acid in water. The results illustrate a simple and accurate method for the measurement of the coefficient of molecular diffusion of slightly soluble solutes.

Simulation of volumetric heating of a moist medium with allowance for fluid mobility

2012 ◽  
Vol 9 (1) ◽  
pp. 91-93
Author(s):  
U.R. Ilyasov ◽  
A.V. Dolgushev
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Numerical Solution ◽  
Heat And Mass Transfer ◽  
Transfer Process ◽  
Thermal Action ◽  
Mass Transfer Process ◽  
Low Permeability ◽  
Volumetric Heating ◽  
Drying Regime

The problem of volumetric thermal action on a moist porous medium is considered. Numerical solution, the influence of fluid mobility on the dynamics of the heat and mass transfer process is analyzed. It is established that fluid mobility leads to a softer drying regime. It is shown that in low-permeability media, the fluid can be assumed to be stationary.

Mass transfer into the liquid in turbulent flow at high Schmidt numbers. Dissolution of benzoic acid into aqueous solutions of glycerol from internal surface of the pipe

1981 ◽  
Vol 46 (7) ◽  
pp. 1566-1576
Author(s):  
František Vašák ◽  
Václav Kolář ◽  
Zdeněk Brož
Keyword(s):  
Mass Transfer ◽  
Benzoic Acid ◽  
Aqueous Solutions ◽  
Cross Section ◽  
Circular Cross Section ◽  
Internal Surface ◽  
Theoretical Relation ◽  
Acid Dissolution ◽  
Schmidt Numbers ◽  
Unified Description

Theoretical relation derived in the last study for calculation of the mass transfer coefficient in the region of not fully developed concentration profile at high Schmidt numbers has been verified experimentally. This experimental study has been devoted to measurements of the rate of benzoic acid dissolution into aqueous solutions of glycerol from the internal surface of the pipe of circular cross section in the range 933 ⪬ Sc ⪬ 225 000 and 5 000 ⪬ Re ⪬ 50 000. It has been possible to explain on basis of the theoretical model, the differences between the data of various authors and to obtain a unified description of the phenomena.

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