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Abstract Process Economics Program Report 269 SUPERCRITICAL CO2: A GREEN SOLVENT

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Abstract Process Economics Program Report 269 SUPERCRITICAL CO2: A GREEN SOLVENT ( abstract-process-economics-program-report-269-supercritical- )

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Abstract Process Economics Program Report 269 SUPERCRITICAL CO2: A GREEN SOLVENT (August 2009) Many industrial chemical reactions, extraction, chemical separations and cleaning processes involve the use of organic solvents. In addition to the handling and disposal issues associated in these operations, these solvents can pose a number of environmental concerns such as atmospheric and land toxicity. In many cases, conventional organic solvents are regulated as volatile organic compound because of their contribution to the green house effect. In addition, certain organic solvents are under restriction due to their ozone-depletion potential. Supercritical carbon dioxide is an attractive alternative solvent in place of traditional organic solvents. Early applications of supercritical fluid include chromatography applications and extraction applications particularly caffeine extraction from tea and coffee. There have been an increasing number of commercialized and potential applications for supercritical fluids in reactions, catalysis, extraction involving natural products and pharmaceutical, polymer production and processing, environmental and soil remediation, cleaning processes, semiconductor processing, and powder production. This report reviews the fundamental of supercritical CO2 processing, current and potential applications, and patents. The technological and economical challenges involved in implementation of the technology in different applications are discussed. We also include process economic evaluation analyses of several supercritical CO2 applications: (1) Hydroformylation of octene, (2) Extraction using supercritical CO2, (3) Fluoropolymer production with supercritical CO2 as a polymerization medium, and (4) Polycarbonate production with supercritical CO2 as a raw material. © SRI Consulting PEP Report 269

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