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its supercritical region CO2 as a solvent. Supercritical CO2 is a good solvent for many nonpolar, and a few polar, low-molecular-weight compounds. It is not a very good solvent for high- molecular-weight compounds and the majority of polar compounds. Uneconomically high process pressure may be required to solvate polar, inorganic or high-molecular- weight material in CO2. To increase the solubility of such compounds in supercritical CO2, small amounts of polar or non-polar co-solvents may be added. Highly CO2-soluble surfactants and CO2-phillic ligands have also been developed to improve the solubility of compounds in CO2. EXTRACTIONS USING CO2 Currently, the widest application of supercritical CO2 is in extraction. Total CO2 consumption in supercritical extraction processes is estimated to have been approximately 15,000 to 25,000 ton/yr in 1994 and between 30,000 and 35,000 tons in 2002. Worldwide, over 100 facilities are estimated to use dense CO2 for extraction and purification. Large-scale commercial plants using supercritical CO2 extraction are found in the food industries (Table 2). Table 2. Commercial-Scale Supercritical- CO2 Extraction Plants and Processes JOB LISTINGS Search for Jobs Process Co!ee deca!eination Tea deca!eination Fatty acids from spent barley Vitamin E oil, phytosterol, fatty acid methyl ester, ginger oil Nicotine extraction Natural insecticide/pesticide (Pyrethrum extract) Hops extraction Location Houston, Tex., U.S. Bremen, Germany Bremen, Germany Poszillo, Italy Munchmuenster,SKW-Trostberg Spices/flavors/aromas/Edmonton, natural Canada products/colors Tsukaba, Japan Germany Dusseldorf, Germany Wuhan, Hubei, China Hopewell, Va., U.S. High Wycombe, U.K. AG Marbery, GmbH Wuhan Kaidi Fine Chemical Industrial Co. Philip Morris Agropharm Wolnzach, Germany Yakina, Washington, U.S.Corp. of America Melbourne, Australia West Midlands, U.K. Munchmuenster,SKW-Trostberg Germany Rehlingen, Germany AG Flavex Gmbh Norac Technologies Ogawa Flavours and Fragrances Manufacturer Maximus Co!ee Group LP (formerly General Foods) Ka!e HAG AG Hermsen SKW-Trostberg AG What is this? Hopfenextraktion, HVG Hops Extraction Carlton & United Beverages Ltd. Botanix ! (https://www.chemengonline.com/videos/crystal-clear-ultrapure-chemicals/) More from GEA " (/videos/?tag=gea) Steel Belt Units for Medical Membranes View All Videos ยป (/videos/) Crystal clear - ultrapure chemicals View Jobs | Search Jobs | Post Resume Upstream Oil & Gas: Automation intelligence from wellhead to distribution Video - CoriolisMaster Video - Do you really need a thermowell? The in!uence of IIoT in the dewatering process step of pigment production View MorePDF Image | SUPERCRITICAL CO2: A GREEN SOLVENT
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