Influence of Organic Phase Polarity on Interfacial Mechanism and Efficiency of Reactive Extraction of Acetic Acid with Tri-n-octylamine

2011 ◽  
Vol 56 (5) ◽  
pp. 2521-2526 ◽  
Author(s):  
Dan Caşcaval ◽  
Lenuţa Kloetzer ◽  
Anca-Irina Galaction
Keyword(s):  
Acetic Acid ◽  
Organic Phase ◽  
Reactive Extraction

Collaborative Study of a Column Chromatographic Method for Chlorothiazide, Methyclothiazide, and Polythiazide

1973 ◽  
Vol 56 (3) ◽  
pp. 677-680
Author(s):  
F Raymond Fazzari
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Determination ◽  
Organic Phase ◽  
Chromatographic Method ◽  
Collaborative Study ◽  
Standard Deviations ◽  
Column Chromatographic

Abstract Chlorothiazide is eluted from a K2HPO4 column with acetic acid-ether solvent and extracted from the organic phase into HCl for the Spectrophotometric determination. Methyclothiazide and polythiazide are eluted from a NaHCO3 column with CHCl3 and measured directly. The method was collaboratively studied by 10 analysts. The average per cent recovered and standard deviations for preparations of chlorothiazide and methyclothiazide were 100.2±0.67 and 99.8±1.64, respectively. The method for chlorothiazide and methyclothiazide has been adopted as official first action.

Extraction and Spectrophotometry Determination of Benzthiazide, Hydrochlorothiazide, and Hydroflumethiazide in Pharmaceuticals

1970 ◽  
Vol 53 (3) ◽  
pp. 582-584
Author(s):  
F Raymond Fazzari
Keyword(s):  
Acetic Acid ◽  
Spectrophotometric Determination ◽  
Organic Phase ◽  
Active Ingredient ◽  
Separation Techniques

Abstract A method has been developed for the determination of benzthiazide, hydrochlorothiazide, and hydroflumethiazide in pharmaceuticals. The procedure is rapid and specific and employs established separation techniques. The active ingredient is eluted from a basic Celite column with an acetic acid-ether solvent and extracted from the organic phase into NaOH for the spectrophotometric determination.

Spectroscopic Study of the Uranyl—Acetohydroxamate Adduct with Tributyl Phosphate

2007 ◽  
Vol 61 (7) ◽  
pp. 772-776 ◽  
Author(s):  
Peter Tkac ◽  
Alena Paulenova ◽  
Kevin P. Gable
Keyword(s):  
Acetic Acid ◽  
Organic Phase ◽  
Tributyl Phosphate ◽  
Chelate Ring ◽  
Spectroscopic Studies ◽  
Acetohydroxamic Acid ◽  
Ft Ir ◽  
Uranium Distribution ◽  
Ir Spectroscopic ◽  
Hydrolysis Of

The ultraviolet–visible (UV-Vis) and Fourier transform infrared (FT-IR) spectroscopic studies carried out for the system UO2(NO3)/AHA/TBP (uranyl–acetohydroxamate–tributyl phosphate) confirmed the presence of the adduct of UO2(NO3)(AHA) ·2TBP with 1:1 stoichiometry for UO2:AHA (acetohydroxamic acid). The spectrum of this complex is identical to the infrared spectrum of the organic phase formed in the uranium distribution experiments with 30% TBP/n-dodecane and AHA present in aqueous phase. Disappearance of the hydroxyl stretching band and a shift in the position of the carbonyl band in the infrared spectra revealed that both the hydroxyl and the carbonyl group of acetohydroxamic acid are involved in the chelate ring with uranium. Also, acetic acid, accrued after acidic hydrolysis of acetohydroxamic acid, was identified in the extraction organic phase.

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.

Recovery of cis,cis-muconic acid from organic phase after reactive extraction

2016 ◽  
Vol 169 ◽  
pp. 1-8 ◽  
Author(s):  
Jannick Gorden ◽  
Tim Zeiner ◽  
Gabriele Sadowski ◽  
Christoph Brandenbusch
Keyword(s):  
Organic Phase ◽  
Reactive Extraction ◽  
Muconic Acid

Recovery of acetic acid from an aqueous pyrolysis oil phase by reactive extraction using tri-n-octylamine

2011 ◽  
Vol 176-177 ◽  
pp. 244-252 ◽  
Author(s):  
C.B. Rasrendra ◽  
B. Girisuta ◽  
H.H. van de Bovenkamp ◽  
J.G.M. Winkelman ◽  
E.J. Leijenhorst ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reactive Extraction ◽  
Pyrolysis Oil
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