An Efficient Separation Method for Enol Phosphate and Corresponding β-Ketophosphonate from Their Mixtures under Aqueous Conditions.

ChemInform ◽  
2003 ◽  
Vol 34 (44) ◽  
Author(s):  
Cornelis M. Moorhoff
Keyword(s):  
Separation Method ◽  
Efficient Separation ◽  
Aqueous Conditions ◽  
Enol Phosphate

Arsenic speciation analysis in environmental water, sediment and soil samples by magnetic ionic liquid-based air-assisted liquid–liquid microextraction

RSC Advances ◽  
2016 ◽  
Vol 6 (111) ◽  
pp. 110247-110254 ◽  
Author(s):  
Xiaojun Wang ◽  
Guoliang Xu ◽  
Peng Chen ◽  
Xueying Liu ◽  
Ye Fang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Arsenic Speciation ◽  
Speciation Analysis ◽  
Environmental Water ◽  
Soil Samples ◽  
Separation Method ◽  
Efficient Separation ◽  
Magnetic Ionic Liquid ◽  
First Time ◽  
Liquid Microextraction

This highly efficient separation method combines the advantages of magnetic ionic liquid (MIL) and air-assisted liquid–liquid microextraction (AALLME) for the first time.

Improvement of an efficient separation method for chemicals in diesel exhaust particles: analysis for nitrophenols

2008 ◽  
Vol 15 (4) ◽  
pp. 318-321 ◽  
Author(s):  
Yoichi Noya ◽  
Yusuke Mikami ◽  
Shinji Taneda ◽  
Yoki Mori ◽  
Akira K. Suzuki ◽  
...  
Keyword(s):  
Diesel Exhaust ◽  
Diesel Exhaust Particles ◽  
Separation Method ◽  
Efficient Separation ◽  
Exhaust Particles

scholarly journals Effect of Ultrafiltration Operating Conditions for Separation of Ferulic Acid from Arabinoxylans in Corn Fibre Alkaline Extract

2021 ◽  
Vol 13 (9) ◽  
pp. 4682
Author(s):  
Rita Valério ◽  
João G. Crespo ◽  
Claudia F. Galinha ◽  
Carla Brazinha
Keyword(s):  
Ferulic Acid ◽  
Operating Temperature ◽  
Operating Conditions ◽  
Separation Method ◽  
Transmembrane Pressure ◽  
Alkaline Extract ◽  
Efficient Separation ◽  
Crossflow Velocity ◽  
Corn Fibre ◽  
The Impact

Corn fibre, a co-product of the starch industry, is rich in compounds with high added value, such as ferulic acid and arabinoxylans, which are released during alkaline extraction. This work aims to optimise an efficient separation method for the recovery of these two compounds from a corn fibre alkaline extract, allowing an efficient valorisation of this co-product. Ultrafiltration was selected as separation method, due to its potential to fractionate these compounds. In order to minimise the loss of membrane permeance, due to mass transfer limitations caused by the high arabinoxylan viscosity, the impact of relevant ultrafiltration operating parameters (membrane molecular weight cut-off, fluid dynamics conditions, transmembrane pressure, and operating temperature) were evaluated. A Nadir UP 150 membrane was found to be an adequate choice, allowing for an efficient separation of ferulic acid from arabinoxylans, with null rejection of ferulic acid, a high estimated rejection of arabinoxylans 98.0% ± 1.7%, and the highest permeance of all tested membranes. A response surface methodology (RSM) was used to infer the effect of ultrafiltration conditions (crossflow velocity, transmembrane pressure and operating temperature) on the rejection of ferulic acid, retention of arabinoxylans (assessed through apparent viscosity of the retentate stream), and permeance. Through mathematical modelling it was possible to determine that the best conditions are the highest operating temperature and initial crossflow velocity tested (66 °C and 1.06 m.s−1, respectively), and the lowest transmembrane pressure tested (0.7 bar).

Phase separation in sol gel-derived ceramic films of silica-zirconia, alumina-zirconia, and titania-zirconia system

1994 ◽  
Vol 52 ◽  
pp. 646-647
Author(s):  
J. Tong ◽  
L. Eyring
Keyword(s):  
Fracture Toughness ◽  
Phase Separation ◽  
Sol Gel ◽  
Great Influence ◽  
High Strength ◽  
Chemical Durability ◽  
Separation Method ◽  
Toughening Mechanism ◽  
Ceramic Films ◽  
Zirconia Toughened Alumina

There is increasing interest in composites containing zirconia because of their high strength, fracture toughness, and its great influence on the chemical durability in glass. For the zirconia-silica system, monolithic glasses, fibers and coatings have been obtained. There is currently a great interest in designing zirconia-toughened alumina including exploration of the processing methods and the toughening mechanism.The possibility of forming nanocrystal composites by a phase separation method has been investigated in three systems: zirconia-alumina, zirconia-silica and zirconia-titania using HREM. The morphological observations initially suggest that the formation of nanocrystal composites by a phase separation method is possible in the zirconia-alumina and zirconia-silica systems, but impossible in the zirconia-titania system. The separation-produced grain size in silica-zirconia system is around 5 nm and is more uniform than that in the alumina-zirconia system in which the sizes of the small polyhedron grains are around 10 nm. In the titania-zirconia system, there is no obvious separation as was observed in die alumina-zirconia and silica-zirconia system.

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