ChemInform Abstract: Unlocking the Potential of Supported Liquid Phase Catalysts with Supercritical Fluids: Low Temperature Continuous Flow Catalysis with Integrated Product Separation

ChemInform ◽  
2016 ◽  
Vol 47 (37) ◽  
Author(s):  
Giancarlo Francio ◽  
Ulrich Hintermair ◽  
Walter Leitner
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Supercritical Fluids ◽  
Continuous Flow ◽  
Product Separation ◽  
Supported Liquid Phase

scholarly journals Unlocking the potential of supported liquid phase catalysts with supercritical fluids: low temperature continuous flow catalysis with integrated product separation

2015 ◽  
Vol 373 (2057) ◽  
pp. 20150005 ◽  
Author(s):  
Giancarlo Franciò ◽  
Ulrich Hintermair ◽  
Walter Leitner
Keyword(s):  
Liquid Phase ◽  
Homogeneous Catalysis ◽  
Supercritical Fluids ◽  
Continuous Flow ◽  
Thermal Sensitivity ◽  
Standard Procedure ◽  
Sustainable Manufacturing ◽  
Catalyst System ◽  
Process Conditions ◽  
Product Separation

Solution-phase catalysis using molecular transition metal complexes is an extremely powerful tool for chemical synthesis and a key technology for sustainable manufacturing. However, as the reaction complexity and thermal sensitivity of the catalytic system increase, engineering challenges associated with product separation and catalyst recovery can override the value of the product. This persistent downstream issue often renders industrial exploitation of homogeneous catalysis uneconomical despite impressive batch performance of the catalyst. In this regard, continuous-flow systems that allow steady-state homogeneous turnover in a stationary liquid phase while at the same time effecting integrated product separation at mild process temperatures represent a particularly attractive scenario. While continuous-flow processing is a standard procedure for large volume manufacturing, capitalizing on its potential in the realm of the molecular complexity of organic synthesis is still an emerging area that requires innovative solutions. Here we highlight some recent developments which have succeeded in realizing such systems by the combination of near- and supercritical fluids with homogeneous catalysts in supported liquid phases. The cases discussed exemplify how all three levels of continuous-flow homogeneous catalysis (catalyst system, separation strategy, process scheme) must be matched to locate viable process conditions.

Hollow fiber supported liquid-phase microextraction combined with maltodextrin-modified capillary electrophoresis for the determination of citalopram enantiomers in urine samples

2015 ◽  
Vol 7 (5) ◽  
pp. 2012-2019 ◽  
Author(s):  
Jafar Abolhasani ◽  
Hamid Reza Jafariyan ◽  
Mohammad Mahdi khataei ◽  
Rahim Hosseinzadeh-khanmiri ◽  
Ebrahim Ghorbani-kalhor ◽  
...  
Keyword(s):  
Capillary Electrophoresis ◽  
Liquid Phase ◽  
Hollow Fiber ◽  
Urine Samples ◽  
Simple Method ◽  
Liquid Phase Microextraction ◽  
Supported Liquid Phase

A simple method was developed for the separation and determination of citalopram enantiomers in urine samples.

Low-temperature liquid-phase epitaxy of YBa2Cu3Oyfilms by the molten KOH method

2016 ◽  
Vol 55 (4S) ◽  
pp. 04EJ13 ◽  
Author(s):  
Shuhei Funaki ◽  
Yasuji Yamada ◽  
Ryota Okunishi ◽  
Yugo Miyachi
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Liquid Phase Epitaxy ◽  
Temperature Liquid

Low-Temperature Liquid-Phase Synthesis and Electrochemical Activity of α-Nickel Hydroxide with Flower-Like Micro-/Nano-Structure

2011 ◽  
Vol 347-353 ◽  
pp. 3379-3383
Author(s):  
Zhi Wei Li ◽  
Xu Xiang ◽  
Zong Min Tian
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Ethylene Glycol ◽  
Nickel Hydroxide ◽  
Variable Temperature ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Electrochemical Activity ◽  
Nano Structure ◽  
Pure Phase

The synthesis of α-nickel hydroxide has been achieved via a facile liquid-phase precipitation approach, using the mixed solvents of ethylene glycol and water as reaction medium at low temperature. The XRD characterization indicates that pure phase α-Ni(OH)2can be obtained under variable temperature and pH value. The products present a flower-like micro-/nano-structure assembled with curved nanosheets. The nanosheets have the width of 100~500 nm and the thickness of 20~70 nm. The cavities are formed in the structure due to the interconnection of curved nanosheets. The solvents play a key role in the formation of Ni(OH)2with different forms. Pure phase α-Ni(OH)2can only be synthesized in the mixed solvents of ethylene glycol and water. Cyclic voltammetry was applied to test the electrochemical activity of the as-synthesized α-Ni(OH)2. The findings suggest that the α-Ni(OH)2with a micro-/nano-structure exhibits excellent electrochemical activity, which may be considered as a promising candidate of electrode material.

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