Solubility Measurement And Intrinsic Kinetics Study On Hydrogenation Of Alkylanthraquinone

Hydrogen peroxide is an important green chemical agent, which is mainly producted from anthraquinone. 2-Ethylanthraquinone (EAQ) is frequently used as the carrier and the solvents are usually mixed polar and nonpolar organics. Usually the polar solvent is trioctylphosphate(TOP) and the nonpolar is aromatics (C₉^C₁2). However the solubility of EAQ in the mixed solvents is low. If the solubility of alkylanthraquinone in organic solvents is high, the concentration of H2O2 can be increased which can reduce the consumption of solvent and depress the cost. Base on this, the thesis focuses on improvement of the method of anthraquinone for H2O2.Firstly, the solubility of 2-amylanthraquinone(AAQ) in 1,3,5-trimethylbenzen(TMB) /TOP, TMB / tetrabutylurea(TBU) and TMB /methylcyclohexylacetate (MCA) at 3:1 in volume was determined from 303.15 to 323.15 K, respectively. The solubility of EAQ in the three mixtures was also measured. The solubility of AAQ in the three solvents is much higher than that of EAQ indicating that AAQ is much better than EAQ in the anthraquinone method for H2O2. The solubility of AAQ and EAQ are higher in TMB/TBU, TMB/MCA than that in TMB/TOP suggesting that TBU and MCA can replace TOP as polar solvent. At the same time, the obtained data were correlared withλ-h equation and Wilson equition and showed good agreement.Secondly, solid-liquid equilibrium data of EAQ-AAQ-TMB/MCA and EAQ-AAQ-TMB/TBU were measured, respectively. The data were treated with ternary phase diagram, which may give useful information for the improvement of the anthraquinone method for H2O2.Thirdly, hydrogenation intrinsic kinetics of AAQ was studied. The intrinsic kinetic data were measured. TMB/TOP (3:1) was used as solvent and the temperature and pressure were 313.15 to 343.15K and 0.1 to 0.2MPa, respectively. A power law model was established. r_AHQ = 78.34e^-8944/RTC_AQ⁰P_H2^0.40...