Write a note on Green Solvents.
The green solvent is newer concept involves technology which has been popularly preferred over conventional solvent extraction process because of environmental concerns, such as the need to eliminate organic solvents and to find appropriate technologies for their disposal e.g. Ionic liquids CO2,Propylene Glycol etc. Super critical fluid possesses properties of gases and liquids in an intriguing manner, which could offer range of applications/possibilities in both synthetic and analytical chemistry. Supercritical ionic liquid carbon dioxide has found to be an energy conserving, selective and waste reducing alternatives to organic solvents and therefore is viewed as promising environmentally benign solvents. In addition supercritical fluids can lead to reaction, which are difficult or even impossible to achieve conventional solvents Supercritical ionic extraction is relatively new technology with a large potential for application in industry.