Download Green Chemistry Using Liquid and Supercritical Carbon by Joseph M. DeSimone, William Tumas PDF

By Joseph M. DeSimone, William Tumas

Chemists were getting to know the potential for liquid and supercritical carbon dioxide for environmentally secure functions. This edited quantity will hide a few of the functions of utilizing those types of carbon dioxide. the 3 major parts of concentration are catalysis and chemical synthesis in CO2, polymers in CO2, and business strategies and functions using CO2. The publication is aimed toward researchers in academia and undefined, and the individuals are all specialists within the box.

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Extra resources for Green Chemistry Using Liquid and Supercritical Carbon Dioxide (Green Chemistry Series)

Example text

Enhanced Mass Transfer, Diffusivity Supercritical fluids share many of the advantages of gases, including lower viscosities and higher diffusivities relative to liquid solvents, thereby potentially providing the opportunity for faster rates, particularly for diffusion-limited reactions. Selectivity Enhancement and Tunable Solvent Properties The high compressibility of supercritical fluids allows for control of their densities (and therefore their density-dependent properties, including the dielectric constant, viscosity, and overall solvent strength) through changes in temperature and pressure.

1996) Phase transfer dihydroxylation of cycloalkenes OsO4/NaIO4 in H2O/CO2 Buelow et al. (1998) Heck vinylation Pd(OAc)2/ TPPTS Hydrogenation of styrene and 1-alkenes in CO2/H2O emulsions Rh/TPPTS/ Surfactants Enhanced separations Enhanced activity Bhanage et al. (1999b) Gas miscibility Jacobson et al. , 1999b). The conversions were found to be ca. four times higher than those in toluene/water mixtures (38% vs. 11%). Jacobson et al. (1999) have observed similar rate enhancements for styrene hydrogenation using a water-soluble Rh complex with dppts ligands [dppts ¼ C6H5P(C6H4SO3Na)2].

Burk, M. ; Feng, S. ; Gross, M. ; Tumas, W. J. Am. Chem. Soc. 1995, 117, 8277–8278.

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