Wednesday, December 16, 2009

What solvents should be used for oil extraction?

I read that the use of solvents in oil extraction in seeds and plants yields more product. But I don't know what solvents to use for oilseed extraction. Help please. Thank you very much! ^_^What solvents should be used for oil extraction?
First, solvent extractions of anything are not something you should be attempting at home. Solvent extraction can be a dangerous, messy process. The most commonly used solvent for commercial fat extraction is hexane. Acetone is not a good enough solvent and chlorinated solvents cannot be used because they are carcinogenic. Although hexane has some toxicity the concentrations in the extracted fats are too low to be a significant health threat. The other advantage in hexane is economic. Hexane is relatively cheap and it has high volatility so that recovery and reuse of the solvent makes it economically attractive.What solvents should be used for oil extraction?
There seems to be some mistake. Ethanol is completely miscible with water in all proportions. Otherwise how can one have a whiskey and water? If any thing, it is quite hydrophilic.





Probably it was trichloroethylene or such chlorinated solvent that was meant, which are also used for solvent extraction.





Ketonic solvents are quite suitable and used in the industry. Acetone is the first of the series. It also boils at a low enough temperature so that solvent recovery without heat damage to the oil is easy.
you could use 95% ethanol. Since it has a hydrophobic property, it binds with the oils. Also since the oil is hydrophobic one, it goes with the scientific quote saying: ';Like dissolves like';

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