A kinetic study of the initiated oxidation of benzyl alcohol and cumene by molecular oxygen was performed. The oxidation rate was more enhanced with N‐hydroxyphthalimide (NHPI) in the case of cumene than that of benzyl alcohol. HOOH inhibits cumene oxidation and does not affect the rate of oxidation of benzyl alcohol. It was shown that termination chain reactions of phthalimid‐N‐oxyl radicals (PINO•) does not occur with RОО• and proceeds with HOO•. A kinetic scheme of the process and an equation describing the kinetics of oxidation of benzyl alcohol in the presence of NHPI are proposed. Using the PM7 method, the thermodynamic characteristics of elementary steps of oxidation explaining the obtained results were calculated.
The shear forces and corresponding strains appearing in the flow under the action of chemical potential gradient have been analyzed. The ratios for determination of the viscosity coefficient for lowmolecular pure liquids and solution components were established. It was proved that the viscosity of the lowmolecular solution can be expressed via the terms of the viscosity coefficients of its components and via their concentration.
We studied the gradient dependence of the effective viscosity η for the diluted solution of the polystyrene in toluene under three concentrations ρ = = 0.5•10 5 , 1•10 5 and 2•10 5 g/m 3 and for four polystyrene fractions with average molar weights М = 5.2•10 4 , 4.4•10 4 , 3.3•10 4 and 1.8•10 4 g/mol, in the temperature range of 293-308 K. The experiments have been carried out with the use of rotary viscometer "Rheotest 2.1" at various cylinder rotation angular rate ω (r/s). The analysis of the dependences η(ω) permitted to mark out the frictional η f and elastic η e components of the viscosity and to study their dependences on the concentration ρ of the polymer into the solution, on the length of the chain N and on the temperature T. We have obtained the equation for defining the intrinsic viscosity of the polymer solution. It was shown that the basic contribution into the intrinsic viscosity gives the elastic component of the viscosity with taking into account the gradient dependence of η e .
Magnetically sensitive catalysts of the core-shell type based on stabilized particles of cobalt ferrite and copper oxide by the sol-gel method were obtained. A multistage manufacturing technology of the composite CoFe 2 O 4 /SiO 2 /CuO is proposed. Qualitative and quantitative microanalysis of the obtained composite were carried out and its catalytic action was investigated in the process of the initiated oxidation of cumene. The resulting nanocatalyst is promising for use in the oxidation processes of hydrocarbons.
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