Results 231 to 240 of about 68,000 (273)

Dissolution of uranium dioxide in supercritical fluid carbon dioxide

Chemical Communications, 2001
Uranium dioxide can be dissolved in supercritical CO2 with a CO2-philic TBP-HNO3 complexant to form a highly soluble UO2(NO3)(2).2TBP complex; this new method of dissolving UO2 that requires no water or organic solvent may have important applications for reprocessing of spent nuclear fuels and for treatment of nuclear wastes.
M D, Samsonov, C M, Wai, S C, Lee, Y, Kulyako, N G, Smart   +4 more
openaire   +2 more sources

Supercritical Carbon Dioxide

2014
Carbon dioxide, dry ice (solid phase) [124-38-9] CO2 (MW 44.01) InChI = 1S/CO2/c2-1-3 InChIKey = CURLTUGMZLYLDI-UHFFFAOYSA-N (supercritical carbon dioxide is used as a solvent, reagent, and reaction medium) Physical Data mp: −56.6 °C; bp: −78.5 °C (sublimes); density: 1.977 kg m−3 (gas at 1 bar and 0 °C); crystal structure ...
openaire   +1 more source

Supercritical carbon dioxide spray systems

Metal Finishing, 1997
Supercritical carbon dioxide as a viscosity reduction solvent was first commercialized in 1990. 1 The process is designed to overcome many of the issues facing the coatings industry today. Initially, reduction of air pollution was the sole goal, but as the technology develops, a myriad of other benefits are being recognized.
Jeff Lewis, J.N. Argyropoulos, K.A. Nielson   +2 more
openaire   +1 more source

Solubility in Supercritical Carbon Dioxide

2006
Abbreviations Solubility Molecular Weight Nomenclature Other List of Solutes Introduction Supercritical Carbon Dioxide Solubility in Supercritical Carbon Dioxide Measurements of Solubility in Supercritical Carbon Dioxide Static Methods Dynamic Methods Modeling of Solubility in Supercritical Carbon Dioxide References Solubility Data Acenaphthene through
Ram B. Gupta, Jae-Jin Shim
openaire   +1 more source

Solubility of Cannabinol in Supercritical Carbon Dioxide

Journal of Chemical & Engineering Data, 2010
Cannabinol (CBN) is a decomposition product of the cannabinoid (-)-¿9-tetrahydrocannabinol (¿9-THC), the main active compound of cannabis. The solubility of CBN in supercritical carbon dioxide was determined at (314, 327, and 334) K and in the pressure range from (13.0 to 20.2) MPa by using an analytical method with a quasi-flow apparatus.
Perrotin-Brunel, H., Roosmalen, van, M.J.E., Kroon, M.C., Spronsen, van, J., Witkamp, G.J., Peters, C.J.   +5 more
openaire   +2 more sources

Adsorption of Supercritical Carbon Dioxide on Silica

Langmuir, 2001
In this work, the adsorption isotherms of carbon dioxide on silica have been measured with a gravimetric method at nine different temperature values (from 312 up to 466 K) and at pressure levels up to 366 bar. The adopted technique allows for a direct evaluation of the density that is measured simultaneously to the adsorption load, thus avoiding ...
O. D. Giovanni, W. Dorfler, MAZZOTTI, MARCO GIUSEPPE, MORBIDELLI, MASSIMO   +3 more
openaire   +2 more sources

Dyeing of Cotton in Supercritical Carbon Dioxide

Dyes and Pigments, 1998
Abstract The dyeing of cellulosic fibers with disperse and natural dyes was attempted using supercritical carbon dioxide (CO2SCF) as solvent system. The dye uptake was strongly increased if cotton was pretreated with polyethylene glycol (PEG), a known plasticizing agent of cellulose, while reasonable wet-washing and light fastness properties were ...
P. Beltrame, A. Castelli, E. Selli, A. Mossa, G. Testa, A. Bonfatti, A. Seves   +6 more
openaire   +1 more source

Synthesis of Fluoropolymers in Supercritical Carbon Dioxide

Science, 1992
Fluoropolymers are used in many technologically demanding applications because of their balance of high-performance properties. A significant impediment to the synthesis of variants of commercially available amorphous fluoropolymers is their general insolubility in most solvents except chlorofluorocarbons (CFCs).
J M, Desimone, Z, Guan, C S, Elsbernd
openaire   +2 more sources

Selective Catalytic Oxidations in Supercritical Carbon Dioxide

Current Organic Chemistry, 2005
Abstract: Conducting catalytic oxidations of organic substrates in supercritical carbon dioxide as reaction medium is one of the most promising strategy for the creation of fundamental chemical transformations that are environmentally benign.
CAMPESTRINI, SANDRO, TONELLATO, UMBERTO
openaire   +2 more sources

Micronization of drugs using supercritical carbon dioxide

International Journal of Pharmaceutics, 1999
Particles from gas saturated solutions, a novel method for high pressure material processing, has been used for micronization of practically insoluble calcium-channel blockers nifedipine and felodipine and the hypolipidemic agent fenofibrate with the aim of increasing their dissolution rate and hence their bioavailability.
J, Kerc, S, Srcic, Z, Knez, P, Sencar-Bozic   +3 more
openaire   +2 more sources