02178nas a2200229 4500008004100000022001400041245013100055210006900186260008800255300001200343490000700355520127800362653001001640653002901650653002001679653002301699653001801722100002501740700002801765700002301793856013201816 2008 eng d a0352-513900aRapid liquid-liquid extraction of thallium(III) from succinate media with 2-octylaminopyirdine in chloroform as the extractant0 aRapid liquidliquid extraction of thalliumIII from succinate medi aKARNEGIJEVA 4, PO BOX 462, YU-11001 BELGRADE, YUGOSLAVIAbSERBIAN CHEMICAL SOCcJAN a435-4510 v733 a

A simple solvent extraction study of thallium(III) was conducted. Selective and quantitative extraction of thallium(III) by 2-octylaminopyridine (2-OAP) in chloroform occurred from aqueous sodium succinate medium (0.0075 M) at pH 3.0. Thallium(III) was back extracted with acetate buffer (pH 4.63). The effect of the concentration of succinate and 2-OAP, the role of various diluents, stripping agents, loading capacity of 2-OAP, equilibrium time and aqueous:organic volume ratio on the extraction of thallium(III) was studied. The stoichiometry of the extracted species was determined based on the slope analysis method and found to be 1: 2: 1 (metal: acid: extractant). The temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions Delta H, Delta G and Delta S for the extraction reaction. The method is free from interference of a large number of cations and anions. The method was used for the selective extraction of thallium(III) from its binary mixture with Zn(II), Cd(II), Hg(II), Bi(ill), Pb(II), Se(IV), Te(IV), Sb(III), Ga(III), In(III), AI(III), TI(I) and Fe(III). The proposed method was applied to the synthetic mixtures and alloys. It is simple, selective, rapid and eco-friendly.

10a2-OAP10aliquid-liquid extraction10asuccinate media10aTemperature effect10athallium(III)1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/rapid-liquid-liquid-extraction-thalliumiii-succinate-media-2-octylaminopyirdine-chloroform-001999nas a2200241 4500008004100000022001400041245010500055210006900160260011200229300001200341490000600353520108000359653001001439653002301449653001601472653002901488653002101517100002501538700002001563700002301583700002301606856012801629 2009 eng d a1735-207X00aSolvent extraction of trivalent indium from succinate solution by 2-octylaminopyridine in chloroform0 aSolvent extraction of trivalent indium from succinate solution b aNO 7, MARAGHEH ST, OSTAD NEJATOLLAHI AVE, PO BOX 15875-1169, TEHRAN, 00000, IRANbIRANIAN CHEMICAL SOCcMAR a200-2120 v63 a

Extraction processes of indium(III) with 2-octylaminopyridine (2-OAP) from media of various complexing ability, succinate and salicylate, in chloroform have been elucidated. The ion-pair complex has also quantitative extraction in xylene and 1,2-dichloroethane. Indium(III) from organic phase was stripped with 1.0 M hydrochloric acid and determined complexometrically with EDTA. The stoichiometry of the extracted species was found out on the basis of slope analysis. The extraction of indium(III) proceeds by an anion exchange mechanism and the extracted species is [RR'NH(2)(+)In(succinate)(2)(-)]((org)). Temperature dependence of the extraction equilibrium constant was also examined to estimate the apparent thermodynamic functions (Delta H, Delta G and Delta S) for extraction reaction. It is possible to separate indium(III) from Zn(II), Cd(II), Pb(II), Hg(II), Bi(III), Tl(I), Tl(III), Ga(III), Al(III), Te(IV), Se(IV), Sb(III), Fe(III) and Sn(IV). The method is simple, rapid and reproducible and can be used to determine the indium from samples like alloys.

10a2-OAP10aBinary separations10aIndium(III)10aliquid-liquid extraction10aSodium succinate1 aMahamuni, Sandip, V.1 aKolekar, S., S.1 aWadgaonkar, P., P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/solvent-extraction-trivalent-indium-succinate-solution-2-octylaminopyridine-chloroform-002237nas a2200217 4500008004100000022001400041245013900055210006900194260007000263300001400333490000700347520137400354653001001728653001701738653002901755653003701784100002501821700002801846700002301874856012201897 2010 eng d a0352-513900aLiquid-liquid extraction and recovery of gallium(III) from acid media with 2-octylaminopyridine in chloroform: analysis of bauxite ore0 aLiquidliquid extraction and recovery of galliumIII from acid med aKARNEGIJEVA 4, 11 120 BELGRADE, SERBIAbSERBIAN CHEMICAL SOCcApr a1099-11130 v753 a

The liquid liquid extraction of gallium(III) from hydrochloric acid solution using 2-octylaminopyridine (2-OAP) in chloroform was investigated. The extraction of gallium(III) from 6.0-9.0 mol dm(-3) hydrochloric acid was found to be quantitative using 0.033 mol dm-3 2-OAP in chloroform. The effect of the reagent concentration and other parameters on the extraction of gallium(111) was also studied. The stoichiometry of the extracted species of gallium(In) was determined based on the slope analysis method. The extraction reaction proceeded via the anion exchange mechanism from hydrochloric acid and the extracted species was [RR'NH(2)(+)GaCl(4)(-)](org). The extraction of gallium(III) was performed in the presence of various ions to ascertain the tolerance limit to individual ions. The temperature dependence of the extraction equilibrium constants was examined to estimate the apparent thermodynamic functions (Delta H, Delta S and Delta G) for the extraction reaction. Gallium(III) was successfully separated from commonly associated metal ions, such as Zn(II), Pb(II), Cd(II), Hg(II), Bi(III), Al(III), Se(IV), Sb(III), Sn(IV), In(III), TI(I) and TI(III). However, gallium(III) was separated from Fe(III) from weak organic acid media. The procedure was also extended to the determination of gallium(III) in bauxite ore by the standard addition method.

10a2-OAP10agallium(III)10aliquid-liquid extraction10arecovery of gallium from bauxite1 aMahamuni, Sandip, V.1 aWadgaonkar, Prakash, P.1 aAnuse, Mansing, A. uhttps://library.ncl.res.in/content/liquid-liquid-extraction-and-recovery-galliumiii-acid-media-2-octylaminopyridine-002146nas a2200229 4500008004100000022001400041245018200055210006900237260009900306300001400405490000700419520119100426653002201617653002901639653001201668653002401680653001701704100002401721700001601745700002601761856012901787 2012 eng d a1359-511300aDownstream processing of extracellular phytase from aspergillus niger: chromatography process vs. aqueous two phase extraction for its simultaneous partitioning and purification0 aDownstream processing of extracellular phytase from aspergillus  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcJUL a1066-10720 v473 a

The application of single step aqueous two-phase extraction (ATPE) for the downstream processing of phytase from Aspergillus niger NCIM 563, produced under solid state fermentation, has been studied and compared with the traditional multi-step procedure involving salt precipitation and column chromatography. High phytase recovery (98.5%) within a short time (3 h) and improved thermostability was attained by ATPE in comparison to 20% recovery in 96 h by chromatography process.The ATPE method, therefore, seems to be an interesting alternative for simultaneous partitioning and purification of phytase. The influence of system parameters; such as, phase forming salts, polymer molecular weight and system pH on the partitioning behavior of phytase was evaluated. The ATPE system consisting of combination of polyethylene glycol (PEG) 6000 and 8000(10.5%) and sodium citrate (20.5%) resulted in one-sided partitioning of phytase in bottom phase with a purification factor of 2.5. This is the first report on phytase purification using liquid-liquid extraction and the results are likely to be beneficial in the poultry feed industry. (c) 2012 Elsevier Ltd. All rights reserved.

10aAspergillus niger10aliquid-liquid extraction10aPhytase10aPolyethylene glycol10aPurification1 aBhavsar, Kavita, P.1 aKumar, Ravi1 aKhire, Jayant, Malhar uhttps://library.ncl.res.in/content/downstream-processing-extracellular-phytase-aspergillus-niger-chromatography-process-vs-001807nas a2200229 4500008004100000022001400041245008200055210006900137260006700206300001400273490000700287520101300294653001401307653001801321653002901339653001301368653001401381100002701395700001701422700002301439856011501462 2014 eng d a0008-403400aTwo-phase flow in metal monoliths: hydrodynamics and liquid-liquid extraction0 aTwophase flow in metal monoliths hydrodynamics and liquidliquid  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcDEC a2166-21750 v923 a

This work aims to explore the application of metal monoliths as a scale-up option for efficient liquid-liquid extraction. The pressure drop, mass transfer and residence time distribution are measured for low Ca (approximate to 10(-5)) with monoliths having three different cell densities. The cross-over section between two monoliths was seen to enhance mixing in the column. However, the RTD of two-phase liquid-liquid up-flow was inferior to the single phase RTD. For higher cell density substrates, the cross-over zones seem to cause trapping of slugs due to non-superimposing channel ends. Relatively high shear rates through the film of continuous phase helped enhance the mass transfer rates, thereby helping to achieve the desired extraction in a short column. The entrance sections and cross-over zones between the monoliths adversely affected the extraction for higher cell density monoliths. The analysis of data supports use of low cell density monolith for better performance and scale up.

10acapillary10ahydrodynamics10aliquid-liquid extraction10amonolith10aslug flow1 aDeshpande, Jaydeep, B.1 aGosavi, Abha1 aKulkarni, Amol, A. uhttps://library.ncl.res.in/content/two-phase-flow-metal-monoliths-hydrodynamics-and-liquid-liquid-extraction-002736nas a2200265 4500008004100000022001400041245011100055210006900166260000800235300001100243490000800254520181900262653001502081653002302096653002802119653002902147653003002176653002802206100002502234700002802259700002602287700000502313700002302318856012902341 2020 eng d a1383-586600aSolvent extraction of butanol from synthetic solution and fermentation broth: batch and continuous studies0 aSolvent extraction of butanol from synthetic solution and fermen cOCT a1170580 v2493 a

Product recovery is one of the essential finishing steps to any commercial fermentation process. In acetone-butanol-ethanol (ABE) fermentation, butanol recovery is quite tedious mainly due to dilute product and multiple byproduct formation in complex media. Among different recovery methods, extraction has attracted considerable attention in biofuel recovery owing to its high selectivity, low energy consumption, and ease of operation. In present work, the butanol extraction performance from synthetic solvent mixture containing ABE was tested in batch and continuous operations using 20% (v/v) decanol in oleyl alcohol. The optimized extraction conditions were then validated using actual fermentation broth to confirm effectiveness of the extraction operation. The distribution coefficient (K-d) and batch extraction efficiency (E) were in the range of 5.60-9.80 and 87.70-86.90% for fermentation broth and synthetic solution, respectively for a given initial concentration of butanol in the aqueous phase. Further, E was relatively improved by supplementing different inorganic salts. Sodium hydroxide (5%, w/v) was highly effective to recover butanol from fermentation broth (E similar to 97.70%) with K-d of 33.10. Besides, the continuous counter current extraction of butanol in a packed column was performed. The volumetric mass transfer coefficient (kLa) was estimated to be 0.025 1/min at an optimized superficial velocity of the aqueous phase (0.28 cm/min) and sodium hydroxide concentration (5%, w/v). Height of the extraction column was estimated to be 28.32 cm using height of transfer unit (HTU) and number of transfer unit (NTU) concept for extraction efficiency of 97.20%. Overall, the present study has demonstrated an enhanced extraction efficiency of butanol from fermentation broth.

10aBiobutanol10aEquilibrium stages10aHeight of transfer unit10aliquid-liquid extraction10amass transfer coefficient10aNumber of transfer unit1 aKhedkar, Manisha, A.1 aNimbalkar, Pranhita, R.1 aGaikwad, Shashank, G.1 a1 aBankar, Sandip, B. uhttps://library.ncl.res.in/content/solvent-extraction-butanol-synthetic-solution-and-fermentation-broth-batch-and-continuous