scholarly journals Nucleophilic Displacements in Supercritical Carbon Dioxide under Phase-Transfer Catalysis Conditions. 2. Effect of Pressure and Kinetics

2003 ◽  
Vol 68 (10) ◽  
pp. 4046-4051 ◽  
Author(s):  
Alessandro Loris ◽  
Alvise Perosa ◽  
Maurizio Selva ◽  
Pietro Tundo
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Effect Of Pressure ◽  
Supercritical Carbon

The effect of pressure on the characteristics of supercritical carbon dioxide extracts from Calamintha nepeta subsp. nepeta

2020 ◽  
Vol 34 (9) ◽  
Author(s):  
Haïfa Debbabi ◽  
Ridha El Mokni ◽  
Siwar Majdoub ◽  
Aslan Aliev ◽  
Saoussen Hammami
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Effect Of Pressure ◽  
Supercritical Carbon

Functionalized Poly(propylene imine) Dendrimers as Novel Phase Transfer Catalysts in Supercritical Carbon Dioxide

2000 ◽  
Vol 39 (12) ◽  
pp. 4634-4640 ◽  
Author(s):  
E. L. V. Goetheer ◽  
M. W. P. L. Baars ◽  
L. J. P. van den Broeke ◽  
E. W. Meijer ◽  
J. T. F. Keurentjes
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Phase Transfer ◽  
Phase Transfer Catalysts ◽  
Poly Propylene ◽  
Supercritical Carbon

scholarly journals Effect of pressure of supercritical carbon dioxide on morphology of wool fibers during dyeing process

2015 ◽  
Vol 19 (4) ◽  
pp. 1297-1300 ◽  
Author(s):  
Lai-Jiu Zheng ◽  
Peng-Peng Yin ◽  
Fang Ye ◽  
Wei Ju ◽  
Jun Yan
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Release Rate ◽  
Surface Brightness ◽  
Color Difference ◽  
Effect Of Pressure ◽  
Pressure Release ◽  
Dyeing Process ◽  
Wool Fibers ◽  
Supercritical Carbon

In this paper, the effect of pressure release rate on dyeing of wool fibers was studied in the supercritical carbon dioxide dyeing. Surface morphology, chemical composition and color difference at different pressure release rates were investigated by employing scanning electron microscope, color matching, and measuring instrument. Experiment data reveal that wool fibers are easy to be damaged with increasing pressure release rate. Fiber?s surface brightness varies also with the pressure release rate. The phenomena are theoretically explained using Bernoulli's principle.

Study of the Effect of Pressure on Melting Behavior of Saturated Fatty Acids in Liquid or Supercritical Carbon Dioxide

2013 ◽  
Vol 58 (6) ◽  
pp. 1861-1866 ◽  
Author(s):  
Vivek Trivedi ◽  
Ruchir Bhomia ◽  
John C Mitchell ◽  
Nichola J Coleman ◽  
Dennis Douroumis ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Supercritical Carbon Dioxide ◽  
Saturated Fatty Acids ◽  
Melting Behavior ◽  
Effect Of Pressure ◽  
Supercritical Carbon

Reactivity of palladium nanoparticles supported on a microemulsion-based organogel network in supercritical carbon dioxide‡

2016 ◽  
Vol 70 (2) ◽  
Author(s):  
Kazumitsu Naoe ◽  
Tatsuya Ando ◽  
Kenta Kawasaki ◽  
Masanao Imai
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Phase Transfer ◽  
Coupling Reaction ◽  
Average Diameter ◽  
Pd Nanoparticles ◽  
Appreciable Change ◽  
Preparation Conditions ◽  
Gelatin Concentration ◽  
Supercritical Carbon

Palladium (Pd) nanoparticles were prepared using the phase transfer method and coated with alkylamines as stabilizing agents stably dispersed in nonpolar solvents. Spherical Pd nanoparticles with an average diameter of 4 nm and a relatively narrow size distribution were obtained using hexylamine or dodecylamine, and they were successfully incorporated in microemulsion-based gelatin organogel (OG); also, an OG network containing Pd nanoparticles was prepared via drying. For the Mizoroki–Heck cross-coupling reaction of iodobenzene with methyl acrylate in supercritical carbon dioxide, the Pd nanoparticles in the OG network exhibited much higher reactivity than those in powder state. Preparation conditions of OG (e.g., gelatin concentration) affected the apparent reactivity of the supported Pd nanoparticles. The Pd nanoparticles in the OG network with high gelatin concentration were recycled with no appreciable change of reactivity. In contrast, the reactivity of the Pd nanoparticles with low gelatin concentration decreased during recycling.

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