scholarly journals Mass transfer analysis and kinetic modeling for process design of countercurrent membrane supported reactive extraction of carboxylic acids

2021 ◽  
pp. 100119
Author(s):  
Angelo Gössi ◽  
Wolfgang Riedl ◽  
Boelo Schuur
Keyword(s):  
Mass Transfer ◽  
Carboxylic Acids ◽  
Kinetic Modeling ◽  
Process Design ◽  
Reactive Extraction

Carboxylic acids production using residual glycerol as a substrate in anaerobic fermentation: A kinetic modeling study

2020 ◽  
Vol 143 ◽  
pp. 105874
Author(s):  
Milena Maciel Holanda Coelho ◽  
Naassom Wagner Sales Morais ◽  
Tasso Jorge Tavares Ferreira ◽  
Francisco Schiavon Souza Silva ◽  
Erlon Lopes Pereira ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Kinetic Modeling ◽  
Anaerobic Fermentation ◽  
Modeling Study

The kinetic modeling of cumene oxidation taking into account oxygen mass transfer

2020 ◽  
Vol 392 ◽  
pp. 123811
Author(s):  
Kh.E. Kharlampidi ◽  
К.A. Tereshchenko ◽  
T.Sh. Nurmurodov ◽  
D.A. Shiyan ◽  
N.P. Miroshkin ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Kinetic Modeling ◽  
Oxygen Mass Transfer ◽  
Cumene Oxidation

scholarly journals Reactive Extraction of Lactic Acid, Formic Acid and Acetic Acid from Aqueous Solutions with Tri-n-octylamine/1-Octanol/n-Undecane

2019 ◽  
Vol 3 (2) ◽  
pp. 43 ◽  
Author(s):  
Nuttakul Mungma ◽  
Marlene Kienberger ◽  
Matthäus Siebenhofer
Keyword(s):  
Mass Transfer ◽  
Acetic Acid ◽  
Lactic Acid ◽  
Formic Acid ◽  
Fermentation Broth ◽  
Lactic Acid Production ◽  
Mass Action ◽  
Reactive Extraction ◽  
Technical Application ◽  
Pka Value

The present work develops the basics for the isolation of lactic acid, acetic acid and formic acid from a single as well as a mixed feed stream, as is present, for example, in fermentation broth for lactic acid production. Modelling of the phase equilibria data is performed using the law of mass action and shows that the acids are extracted according to their pka value, where formic acid is preferably extracted in comparison to lactic and acetic acid. Back-extraction was performed by 1 M NaHCO3 solution and shows the same tendency regarding the pka value. Based on lactic acid, the solvent phase composition, consisting of tri-n-octylamine/1-octanol/n-undecane, was optimized in terms of the distribution coefficient. The data clearly indicate that, compared to physical extraction, mass transfer can be massively enhanced by reactive extraction. With increasing tri-n-octylamine and 1-octanol concentration, the equilibrium constant increases. However, even when mass transfer increases, tri-n-octylamine concentrations above 40 wt%, lead to third phase formation, which needs to be prevented for technical application. The presented data are the basis for the transfer to liquid membrane permeation, which enables the handling of emulsion tending systems.

scholarly journals REACTIVE EXTRACTION OF DICARBOXYLIC ACIDS I. MECHANISM, LIMITING STEPS AND KINETICS

1997 ◽  
Vol 5 (5) ◽  
pp. 97-110
Author(s):  
Dan Cascaval ◽  
Radu Tudose ◽  
Comeliu Oniscu
Keyword(s):  
Mass Transfer ◽  
Oxalic Acid ◽  
Succinic Acid ◽  
Transfer Process ◽  
Adipic Acid ◽  
Glutaric Acid ◽  
Butyl Acetate ◽  
Dicarboxylic Acids ◽  
Mass Transfer Process ◽  
Reactive Extraction

In this paper the reactive extraction of some dicarboxylic acids (oxalic acid, malonic acid, succinic acid, glutaric acid, and adipic acid) have been studied. These acids have been extracted by Amberlite LA-2 in butyl acetate using a modified extraction cell of the Lewis type. Mechanism, limiting steps, and kinetic of the mass transfer process have been settled.

scholarly journals Equilibrium Study on Reactive Extraction of Lactic Acid with Tri-n – Butyl Phosphate in n - Hexane

2013 ◽  
Vol 12 (2) ◽  
pp. 1
Author(s):  
Panut Mulyono ◽  
Anita Pardah
Keyword(s):  
Aqueous Solution ◽  
Lactic Acid ◽  
Ambient Temperature ◽  
Carboxylic Acids ◽  
Distribution Ratio ◽  
Equilibrium Constants ◽  
Reactive Extraction ◽  
Extraction Temperature ◽  
Process Selection ◽  
Initial Concentration

Extraction of carboxylic acids from dilute aqueous solution using traditional solvents such as ketones, alcohols, ethers, and ester is inefficient because the distribution ratio is rather low. Reactive extraction which exploits reversible chemical complexation is an effective separation process for extraction of carboxylic acids from aqueous streams such as fermentation broths and wastewaters. In the extraction process, selection of the solvent is an important aspect to be considered. Considering its solubility in water, cost and availability, tri-n-butyl phosphate (TBP) seems to be an attractive solvent for the extraction of lactic acid from aqueous solution. The purpose of this experiment is to study the equilibrium of the reactive extraction of lactic acid in aqueous solution with TBP in n-hexane. The parameters studied in this experiment were initial concentration of lactic acid in the aqueous phase, TBP concentration in n-hexane phase, and the extraction temperature. The experiments at ambient temperature were carried out using a separatory funnel, while the experiments at other than ambient temperature were carried out using erlenmeyer flask and water bath shaker to adjust the temperature. In this experiment, the initial concentration of lactic acid was varied from 0.1 to 0.5 gmol/dm3. The range of initial TBP concentrations in n-hexane was 0.1 to 1.0 gmol/dm3 and the extraction temperature range was 283 to 313 K. The experimental results showed that the higher the initial concentration of lactic acid in aqueous solution, the higher the distribution ratio for a fixed TBP concentration and extraction temperature. For a fixed initial concentration of lactic acid in aqueous solution and extraction temperature, the distribution ratio of lactic acid is increased by increasing TBP concentration. The overall equilibrium constants (Kpq) for the experiments using TBP concentration ranging from 0.1 to 1.0 gmol/dm3 at the extraction temperature of 293 K are calculated to be 0.0668 to 0.5144. Kpq for the experiments at the temperature ranging from 283 to 313 K at the initial concentration of lactic acid of 0.2 gmol/L are found to be 0.0122 to 0.8856. The Kpq as a function of temperature (T) in K can be expressed as ln Kpq = 10,596/T - 38.08 with sum of square of error of 0.14.

Application of reactive extraction to recovery of carboxylic acids

2001 ◽  
Vol 6 (6) ◽  
pp. 386-394 ◽  
Author(s):  
Yeon Ki Hong ◽  
Won Hi Hong ◽  
Dong Hoon Han
Keyword(s):  
Carboxylic Acids ◽  
Reactive Extraction
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