Why is Carbon Dioxide Used Most Often in SFE?
Supercritical fluid extraction has emerged as an attractive separation technique for the food and pharmaceutical industries due to a growing demand for natural processes that do not introduce any residual organic chemicals. Supercritical carbon dioxide is by far the most commonly used supercritical fluid. The unique solvent properties of supercritical carbon dioxide have made it a desirable compound for separating antioxidants, pigments, flavors, fragrances, fatty acids, and essential oils from plant and animal materials. In the supercritical state, carbon dioxide behaves as a lipophillic solvent and so, is able to extract most nonpolar solutes. Separation of the carbon dioxide from the extract is simple and nearly instantaneous; leaving no solvent residue in the extract, as would be typical with organic solvent extraction. Unlike liquid solvents, the solving power of supercritical carbon dioxide can be easily adjusted by slight changes in the temperature and pressure, making it possib
Supercritical fluid extraction has emerged as an attractive separation technique for the food and pharmaceutical industries due to a growing demand for “natural” processes that do not introduce any residual organic chemicals. Supercritical carbon dioxide is by far the most commonly used supercritical fluid. The unique solvent properties of supercritical carbon dioxide have made it a desirable compound for separating antioxidants, pigments, flavors, fragrances, fatty acids, and essential oils from plant and animal materials. In the supercritical state, carbon dioxide behaves as a lipophillic solvent and so, is able to extract most nonpolar solutes. Separation of the carbon dioxide from the extract is simple and nearly instantaneous; leaving no solvent residue in the extract, as would be typical with organic solvent extraction. Unlike liquid solvents, the solving power of supercritical carbon dioxide can be easily adjusted by slight changes in the temperature and pressure, making it poss
… In the supercritical state, carbon dioxide behaves as a lipophillic solvent and … http://www.supercriticalfluids.com/faqs.htm Technology Review: Supercritical Carbon Dioxide Carbon dioxide could make microchips smaller, faster and cleaner to build. … Supercritical carbon dioxide can wash over the structures without demolishing them. … http://www.technologyreview.com/computing/12730/ Supercritical fluid – New World Encyclopedia In the case of supercritical carbon dioxide, the viscosity is in the range of 20 … Diffusivities of solutes in supercritical carbon dioxide are up to a factor 10 … http://www.newworldencyclopedia.org/entry/Supercritical_fluid Talk:Supercritical carbon dioxide – Wikipedia, the free encyclopedia Talk:Supercritical carbon dioxide. From Wikipedia, the free encyclopedia … Does anyone know if there are any safety concerns with CO2 in its supercritical sate? … http://en.wikipedia.
