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1. Processing natural products
CO 2 is considered the "green" solvent par excellence, non-flammable, non-toxic (apart from the risk of asphyxiation at high concentrations), widely available worldwide at low prices (around €0.15 to €0.20/kg in Europe) and high purity. As a non-polar solvent, it has relatively limited solvent power with respect to low- or non-polar compounds (hydrocarbons, lipids, aromas, etc.) compared with conventional non-polar liquid solvents, but much higher selectivity, enabling highly efficient fractionation of mixtures. More generally, supercritical solvents – with the exception of dimethyl ether, which is very rarely used – are therefore only a partial substitute for liquid solvents.
It should be remembered that CO 2 , optionally with added ethanol,...
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Processing natural products
Supercritical fluid decontamination
Bibliography
Reference works
Thousands of articles, patents and symposium proceedings ( http://www.isasf.net ), dozens of books make up a considerable bibliography. See The Journal of Supercritical Fluids (Elsevier). Here are a few reference works and bibliographical reviews:
Regulations
Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorization and Restriction of Chemicals (REACH), establishing a European Chemicals Agency, amending Directive 1999/45/EC and repealing Council Regulation (EEC) No 793/93 and Commission Regulation (EC) No 1488/94 as well as Council Directive 76/769/EEC and Commission Directives 91/155/EEC,...
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