Dynamics of gas release during thermal oxidation of TBP solutions in Isopar-M in two-phase system

MRS Advances ◽  
2018 ◽  
Vol 3 (21) ◽  
pp. 1181-1190
Author(s):  
Elena V. Belova ◽  
Zayana V. Dzhivanova ◽  
Boris F. Myasoedov ◽  
Sergey V. Stefanovsky
Keyword(s):  
Thermal Oxidation ◽  
Electron Accelerator ◽  
Phase System ◽  
Phase Extraction ◽  
Gas Release ◽  
Gas Emission ◽  
Two Phase ◽  
Phase Systems ◽  
Kinetics Of ◽  
Autocatalytic Oxidation

ABSTRACTThe dynamics of the gas release at thermal oxidation of the two-phase systems of 30% solution of tri-n-butyl phosphate (TBP) in isoparaffinic diluent Isopar M – aqueous solution of 4.3, 8.2 and 12 mol/L of HNO3 has been investigated within the temperature range from 70°C to 110°C. The effect of pre-irradiation of the system TBP–Isopar-M–HNO3 on the kinetics of its thermolysis has been determined. All of the samples were irradiated with an electron accelerator at a dose rate of 10 kGy/h up to integrated doses of 0.5, 1 and 2 MGy. The parameters of heat and gas emission during thermolysis of the tested extraction system in an open apparatus have been determined experimentally. It has been demonstrated, that there are no conditions for extension of autocatalytic oxidation under heat treatment of two-phase extraction systems in open vessels.

Study of thermal and radiation stability of the extractant based on CMPO in fluorinated sulfones

MRS Advances ◽  
2016 ◽  
Vol 2 (12) ◽  
pp. 641-647 ◽  
Author(s):  
S.V. Stefanovsky ◽  
I.V. Skvortsov ◽  
E.V. Belova ◽  
A.V. Rodin
Keyword(s):  
Aqueous Solution ◽  
Nitric Acid ◽  
Dose Rate ◽  
Electron Accelerator ◽  
Radiation Stability ◽  
Two Phase ◽  
Absorbed Doses ◽  
Phase Systems ◽  
Kinetics Of ◽  
Autocatalytic Oxidation

ABSTRACTThe two-phase systems of pure diluent FS-13 – aqueous solution of 14 mol/L nitric acid and 0.02 mol/L solution of CMPO in diluent FS-13 – aqueous solution of 14 mol/L HNO3 were studied at autoclave temperatures 170 °C and 200 °C. The effect of pre-irradiation on the kinetics of thermolysis was determined. All samples were irradiated using an electron accelerator at a dose rate of 10 kGy/h up to absorbed doses of 0.1, 0.5 and 1 MGy. The parameters of heat and gas emissions were determined during thermolysis of the studied extraction system in a closed apparatus. It has been shown that the conditions required for the growth of autocatalytic oxidation are not created during heating of the two-phase systems in closed vessels even for the extraction systems contacted with 14 mol/l HNO3 for two weeks.

Interphase distribution of 2-furylethylenes

1985 ◽  
Vol 50 (8) ◽  
pp. 1642-1647 ◽  
Author(s):  
Štefan Baláž ◽  
Anton Kuchár ◽  
Ernest Šturdík ◽  
Michal Rosenberg ◽  
Ladislav Štibrányi ◽  
...  
Keyword(s):  
Partition Coefficient ◽  
Partition Coefficients ◽  
Transport Rate ◽  
Phase System ◽  
Two Phase ◽  
Interphase Distribution ◽  
Distribution Kinetics ◽  
System 1 ◽  
Kinetics Of

The distribution kinetics of 35 2-furylethylene derivatives in two-phase system 1-octanol-water was investigated. The transport rate parameters in direction water-1-octanol (l1) and backwards (l2) are partition coefficient P = l1/l2 dependent according to equations l1 = logP - log(βP + 1) + const., l2 = -log(βP + 1) + const., const. = -5.600, β = 0.261. Importance of this finding for assesment of distribution of compounds under investigation in biosystems and also the suitability of the presented method for determination of partition coefficients are discussed.

Aqueous Two-Phase Extraction of Potassium Glycyrrhizinate with Polyethylene Glycol/(NH4)2SO4

2012 ◽  
Vol 550-553 ◽  
pp. 1687-1690
Author(s):  
Chen Sun ◽  
Wen Ju Liu ◽  
Hai Ming Zhang
Keyword(s):  
Polyethylene Glycol ◽  
Mass Fraction ◽  
Ph Value ◽  
Phase System ◽  
Phase Extraction ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Result Show ◽  
A New Technique ◽  
Aqueous Two Phase Extraction

An aqueous two-phase system of polyethylene glycol (PEG)/(NH4)2SO4 with the behavior of forming aqueous two-phase and the distribution rules of potassium glycyrrhizinate in the aqueous two-phase system were studied. Effects of the molecular weight of PEG, the mass fraction of PEG and (NH4)2SO4, and pH value were investigated. The result show that when the mass fraction of PEG1000 was 50%, the mass fraction of (NH4)2SO4 was 5.7%, and pH value was 6.5, the highest extraction recovery of potassium glycyrrhizinate could reach 99.7%. This aqueous two-phase extraction may provide a new technique for separation of potassium glycyrrhizinate.

On the kinetics of phase separation in aqueous two-phase systems

1998 ◽  
Vol 711 (1-2) ◽  
pp. 319-329 ◽  
Author(s):  
M.H Salamanca ◽  
J.C Merchuk ◽  
B.A Andrews ◽  
J.A Asenjo
Keyword(s):  
Phase Separation ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Kinetics Of

Microfluidic generation of aqueous two-phase system (ATPS) droplets by controlled pulsating inlet pressures

Lab on a Chip ◽  
2015 ◽  
Vol 15 (11) ◽  
pp. 2437-2444 ◽  
Author(s):  
Byeong-Ui Moon ◽  
Steven G. Jones ◽  
Dae Kun Hwang ◽  
Scott S. H. Tsai
Keyword(s):  
Interfacial Tension ◽  
Phase System ◽  
Flow Focusing ◽  
Two Phase ◽  
Aqueous Two Phase System ◽  
Microfluidic Flow ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Ultralow Interfacial Tension

Simple microfluidic flow focusing generation of droplets from ultralow interfacial tension aqueous two phase systems (ATPS).

Purification and Concentration of C-Phycocyanin from Spirulina platensis Using Aqueous Two-Phase System

2011 ◽  
Vol 138-139 ◽  
pp. 995-1001 ◽  
Author(s):  
Wei Jie Wang ◽  
Xiao Le Zhang ◽  
Chang Bo Xu ◽  
Hong Yan Cheng
Keyword(s):  
High Purity ◽  
Separation Process ◽  
Phase System ◽  
Two Phase ◽  
Sodium Tartrate ◽  
Aqueous Two Phase Systems ◽  
Phase Systems ◽  
Optimized Conditions ◽  
Potassium Sodium Tartrate ◽  
Partitioning Behavior

In this article, the partitioning behavior of C-phycocyanin (C-PC) in aqueous two-phase systems (ATPS) with different component was investigated to evaluate the applicability of ATPS for extracting high purity of C-PC without chromatography. Under the optimized conditions (pH = 6; PEG-2000, 16 %, w/w; potassium sodium tartrate 21 %, w/w), a maximum purity of 5.01 was achieved after the whole separation process and the yield of the C-PC was 76.94 %.

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