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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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1448 Aydin K. Sunol and Sermin G. Sunol<br />

Reaction Catalyst<br />

Diels-Alder cycloaddition None/NaOH<br />

Ring opening <strong>of</strong> 2,5-dimethylfuran Acid<br />

Hydration/dehydration<br />

Conversion <strong>of</strong> tert-butyl alcohol to isobutylene None/H2SO4/NaOH Dehydration <strong>of</strong> cyclohexanol, 2-methyl cyclohexanol, 2-phenylethanol<br />

Hydrolysis<br />

Acid<br />

Esters to carboxylic acids and alcohols Autocatalytic<br />

Nitriles to amides and then to acid Autocatalytic<br />

Butyronitrile Autocatalytic<br />

Polyethyleneteraphthalate and polyurethane None<br />

Diaryl ether to hydroxyarene None<br />

Triglycerides into fatty acid<br />

Decomposition<br />

None<br />

Cellulose and glucose decomposition None<br />

Nitrobenzene None<br />

4-Nitroaniline None<br />

4-Nitrotoluene<br />

Oxidation<br />

None<br />

Phenols None<br />

Ethanol None<br />

2-Propanol None<br />

2-Butanol None<br />

Chlorinated hydrocarbons None<br />

21.1.4.1.3 Homogeneous non-catalytic reactions in supercritical solvents<br />

The use <strong>of</strong> supercritical fluids as reaction media for organometallic species has also been investigated.<br />

85 Reactions include photochemical replacement <strong>of</strong> carbon monoxide with N2 and H2 in metal carbonyls, where the reaction medium is supercritical xenon. Also, photochemical<br />

activation <strong>of</strong> C-H bonds by organometallic complexes in supercritical carbon dioxide<br />

has also been investigated. More recent studies on photochemical reactions also<br />

include laser flash photolysis <strong>of</strong> metal carbonyls in supercritical carbon dioxide and<br />

ethane 86 and laser flash photolysis <strong>of</strong> the hydrogen abstraction reaction <strong>of</strong> triplet<br />

benxophenone 87 in supercritical ethane and CHF3. 21.1.4.2 Heterogeneous reactions in supercritical solvents - examples<br />

Heterogeneous reactions in supercritical fluids can be catalytic or non-catalytic. Catalytic<br />

heterogeneous reactions are reactions carried out on solid catalysts and are <strong>of</strong> great impor-

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