This study aims to investigate the extraction of formic acid by a high molecular-weight aliphatic amine, tridodecylamine (TDA), and phosphorus-bonded, oxygen-containing extractant, tributyl phosphate (TBP), dissolved in five different diluents (ethyl valerate, diethyl adipate, sebacate, 1-octanol, heptane) each. The experiments were carried out at 298.15 K. Comparisons results made using distribution coefficient, loading factor, separation percentage yield. demonstrated that combination TDA...

The aim of this study was to compare the adsorption efficiency lactic acid onto activated carbon and Amberlite IRA-67, define isotherms. Activated is a well-known industrial adsorbent used in study; IRA-67 weakly basic polyacrylic resin with tertiary amine functional group. Adsorption efficiencies were compared respect their percentage removal acid. result comparison that more efficient than carbon. Each these adsorbents compliance both Freundlich Langmuir

Amberlite LA-2 (a secondary amine mixture) has been studied for its ability to extract acrylic acid at different concentrations. The extraction of by dissolved in seven single solvents (cyclohexane, 2-octanone, toluene, methyl isobutyl ketone (MIBK), iso-octane, hexane, and 1-octanol) investigated with respect concentrations 298.15 K. In the extraction, two acid−amine complexes, (HO):(R2N) (HO):(R2N)2, have assumed exist organic phase case proton-donating diluents, while complexes...

The removal of acetic acid and glycolic from aqueous solution by the weakly basic adsorbent Amberlite IRA-67 has been studied at three different temperatures. removed both acids very well solution. maximum adsorption efficiency found to be 86.29 % 61.36 for acid, respectively. Langmuir Freundlich isotherms have applied experimental data. isotherm fitted data better than acids. Thermodynamic parameters ΔG, ΔH, ΔS were calculated.

In this work, extraction of glycolic acid was investigated from aqueous solutions by different organic containing Amberlite LA-2, a secondary amine mixture. The with LA-2 dissolved in six individiual solvents has been measured at 298.15 K. used were 1-octanol, cyclohexane, isooctane, toluene, 2-octanone, and methyl isobutyl ketone (MIBK). effect parameters on recovery investigated. selected as solvent type, concentration, initial concentration. To show the these parameters, distribution...

The adsorption capabilities of multiwall carbon nanotubes (MWCNTs) for acetic acid have been investigated experimentally and theoretically. Carbon (CNTs) are an important new material in the family. Adsorption time required to attain steady state influences quantities alumina, effects temperature, initial values concentrations determined experimentally. most common used isotherms drawn by using experimental results. These selected as Langmuir, Freundlich, Temkin. In works, equilibrium is...

The aim of this study is to investigate the extraction succinic acid from aqueous solutions by different organic containing Amberlite LA-2, a secondary amine mixture. Extraction equilibria in solution LA-2 seven individual diluents at temperature 298.15 K have been measured. Using Bizek's approach, two acid−amine complexes, (HO)·(R2N) and (HO)·(R2N)2, are assumed exist phase case proton-donating diluents, while complexes (HO)2·(R2N)3 suggested nonproton-donating diluents. Important data for...

The purpose of this study is to investigate the partitioning glycolic acid from aqueous solutions by trioctyl methylammonium chloride, also known as Aliquat 336. Extraction equilibria in solution chloride mixtures three individual diluting solvents and two solvent at a temperature 298.15 K have been measured. effect initial concentration on has investigated. were propanol, cyclohexane, isooctane, butanol, toluene, methyl isobutyl ketone, ethyl acetate. distribution coefficients, D, loading...

Carboxylic acids like citric acid are produced by fermentation. They have been used in many industrial fields as intermediate and starting materials, their importance is still growing. It important to separate them from the fermentation broth. In this sense, comparison of different types solvents amines for extraction carboxylic broth most effective amine-solvent composition sought. Studies performed on tridodecylamine (TDA) (a long chain tertiary amine), Amberlite LA-2 secondary amine...

The adsorption equilibria of l-(+)-tartaric acid onto alumina from wastewaters wineries were studied, and it has been found that the equilibrium fits Langmuir Freundlich isotherms. Adsorption experiments carried out at three different temperatures (298, 310, 325) K. is dependent on concentration amount alumina. maximum percentage removal was 22 % by 298 constants have to be 0.023 g·g−1 0.014 (g·g−1)/(L·g−1)−1/n, respectively, thermodynamic parameters ΔHads0 ΔSads0 for tartaric calculated...

Investigation of adsorption parameters such as effect initial acid concentration, amount adsorbent, temperatures, contact time, fitting data to isotherms, and kinetic models for propionic tartaric by using Amberlite IRA-67 adsorbent was studied. The maximum efficiencies were found be 97.18% 84.46% acid, respectively. best fitted isotherm determined Langmuir acid. better than the Frundlich both acids. Elovich model equation applied each kinetics acids pseudo-second-order model.

Attempts were made to recover succinic acid (IUPAC systematic name as ethane 1,2-dicarboxylic acid) from aqueous solutions by alumina adsorption. Experimental adsorption works conducted with containing in four different concentrations: (0.13, 0.22, 0.32, and 0.45) mol·kg–1. Alumina used 10 amounts: (0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2) g. Also experiments carried out at three temperatures: (298, 308, 318) K. The equilibrium distributions of determined. minimum concentration was...

Equilibrium and kinetic studies for the extraction of succinic acid from aqueous solution with tridodecylamine diluted in MIBK are reported. All measurements were carried out at 298.15 K. The extent to which organic phase may be loaded is expressed as a loading ratio, Z. equilibrium data also interpreted by proposed mechanism three reactions complexation (1:1) (2:1) acid-amine complexes formed. Kinetics has been determined. Kinetic using stirred cell studies. results liquid-liquid correlated...

The extraction of L(+) tartaric acid from aqueous solutions by amberlite LA‐2 is a secondary amine mixture in different diluent solvents. Extraction equilibria 1‐octanol, cyclohexane, isooctane, hexane, methyl isobutyl ketone (MIBK) solvents at temperature 298.15 K have been measured. batch experiments distribution coefficients ( D ), loading factors Z ) and efficiency E were calculated. maximum removal 91 % with MIBK 0.92 mol.L -1 initial concentration Amberlite LA‐2.