Multicomponent solubilities of reactants and products of cyclohexane oxidation in supercritical carbon dioxide
- Indian Inst. of Tech., Bombay (India). Dept. of Chemical Engineering
Cyclohexane oxidation starting with a homogeneous mixture in supercritical carbon dioxide (SC CO{sub 2}) medium encounters phase separation as the products are formed. Multicomponent solubility data in the reacting system are therefore needed to ascertain whether it is due to condensation of the reactants, oxygen and cyclohexane, or the products, cyclohexanone, cyclohexanol, and water. In the present work, solubility measurements have been made for cyclohexanone and cyclohexanol in supercritical CO{sub 2} at 410, 423, and 433 K and in N{sub 2} at 423 K (N{sub 2} is taken as a homomorph for oxygen to avoid reaction). Solubility data have been measured in SC CO{sub 2} at 423 K for each of the three binary mixtures, (i) cyclohexane-cyclohexanone, (ii) cyclohexane-cyclohexanol, and (iii) cyclohexanone-cyclohexanol, at 170 and 205 bar. These data have been utilized to regress for each binary pair two adjustable parameters in the Peng-Robinson (P-R) EOS for predicting the multicomponent solubility data in a SC mixture of CO{sub 2} and O{sub 2} in the proportion of 8:1. It was concluded that the solubility of water is suppressed in the presence of other organic products and would be the first to condense out of the reaction mixture.
- OSTI ID:
- 419857
- Journal Information:
- Industrial and Engineering Chemistry Research, Vol. 35, Issue 12; Other Information: PBD: Dec 1996
- Country of Publication:
- United States
- Language:
- English
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