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| - Production of Hydrogen Peroxide in Liquid CO2. 3. Oxidation ofCO2-Philic Anthrahydroquinones
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| - Hydrogen peroxide is currently produced via the sequential hydrogenation and oxidation of a2-alkylanthraquinone. Use of liquid CO2 as the process solvent could ameliorate severalenvironmental and engineering problems inherent to the conventional process. Oxidationreactions of perfluoroether-functionalized anthrahydroquinones (FAQH2s) generated in situ fromPd-catalyzed hydrogenation of functionalized anthraquinones (FAQs) were conducted in a high-pressure batch reactor in liquid CO2. The reaction was found to be first order with respect toboth O2 and FAQH2. We have also found that the reactivity of FAQH2 in the oxidation is notaffected by the size of the “CO2-philic” tail or the nature of the linker between the aromaticrings and the CO2-philic tail. These results are correlated with our previous conclusions on thephase behavior of FAQs in CO2 and kinetic studies of hydrogenation of FAQs. Finally, anoptimum structure of FAQ to be used in the process is proposed.
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