Learn how to Green your process. Learn how you can teach Green Chemistry in your university lab. Visit Applied Separations at the 14th Annual Green Chemistry and Engineering Conference at the Capital Hilton Hotel in Washington, D.C.
For more information on how Applied Separations can help you green your process, visit the supercritical fluids section of the Applied Separations website.
http://appliedseparations.com/Supercritical/
Thursday, June 17, 2010
Wednesday, June 9, 2010
Solvent-Free Essential Oils
Rosehip Oil
Rosehip oil is a valuable natural product for the cosmetic industry, yet conventional methods of extraction are often time consuming and rely heavily on the use of chemical solvents. Traditionally, the determination of oil in rosehip seeds is accomplished by soxhlet extraction. Since rosehip seeds contain a relatively low percentage of oil compared to other seeds this extraction method is labor intensive and requires a significant quantity of organic solvent, such as hexane.
SCF is an alternative technique using supercritical carbon dioxide to extract rosehip seed oil quickly and naturally in the laboratory. It eliminates the use, exposure to, and disposal of hazardous solvents, while providing comparable extraction results in less time.
For more information on how to extract oil from rosehip seeds without using solvents, visit the Applied Separations website. Click here to download the Extraction of Rosehip Seed Oil using Supercritical Fluids application.
http://www.appliedseparations.com/Applications/default.asp#SCF
http://www.appliedseparations.com/Applications/downloads/SCF/sfe518RosehipSeedOil.pdf
Rosehip oil is a valuable natural product for the cosmetic industry, yet conventional methods of extraction are often time consuming and rely heavily on the use of chemical solvents. Traditionally, the determination of oil in rosehip seeds is accomplished by soxhlet extraction. Since rosehip seeds contain a relatively low percentage of oil compared to other seeds this extraction method is labor intensive and requires a significant quantity of organic solvent, such as hexane.
SCF is an alternative technique using supercritical carbon dioxide to extract rosehip seed oil quickly and naturally in the laboratory. It eliminates the use, exposure to, and disposal of hazardous solvents, while providing comparable extraction results in less time.
For more information on how to extract oil from rosehip seeds without using solvents, visit the Applied Separations website. Click here to download the Extraction of Rosehip Seed Oil using Supercritical Fluids application.
http://www.appliedseparations.com/Applications/default.asp#SCF
http://www.appliedseparations.com/Applications/downloads/SCF/sfe518RosehipSeedOil.pdf
Tuesday, June 1, 2010
What is Supercritical Carbon Dioxide?
Carbon dioxide is in its supercritical fluid state when both the temperature and pressure equal or exceed the critical point of 31°C and 73 atm (see diagram). In its supercritical state, CO2 has both gas-like and liquid-like qualities, and it is this dual characteristic of supercritical fluids that provides the ideal conditions for extracting compounds with a high degree of recovery in a short period of time.
By controlling or regulating pressure and temperature, the density, or solvent strength, of supercritical fluids can be altered to simulate organic solvents ranging from chloroform to methylene chloride to hexane. This dissolving power can be applied to purify, extract, fractionate, infuse, and recrystallize a wide array of materials.
Because CO2 is non-polar, a polar organic co-solvent (or modifier) can be added to the supercritical fluid for processing polar compounds. By controlling the level of pressure/temperature/modifier, supercritical CO2 can dissolve a broad range of compounds, both polar and non-polar.
For more information about supercritical CO2 and how they can improve and green your process, visit the Applied Separations website.
http://appliedseparations.com/Supercritical/Supercritical_CO2.asp
By controlling or regulating pressure and temperature, the density, or solvent strength, of supercritical fluids can be altered to simulate organic solvents ranging from chloroform to methylene chloride to hexane. This dissolving power can be applied to purify, extract, fractionate, infuse, and recrystallize a wide array of materials.
Because CO2 is non-polar, a polar organic co-solvent (or modifier) can be added to the supercritical fluid for processing polar compounds. By controlling the level of pressure/temperature/modifier, supercritical CO2 can dissolve a broad range of compounds, both polar and non-polar.
For more information about supercritical CO2 and how they can improve and green your process, visit the Applied Separations website.
http://appliedseparations.com/Supercritical/Supercritical_CO2.asp
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