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1.
The kinetics of the 2,2′-azobisisobutyronitrile-initiated oxidation of methyl oleate (MO) in the medium of the oxidized substrate
itself (homogeneous system) and in an aqueous solution of cetyltrimethylammonium bromide (aqueous emulsion system, AES) was
studied. The oxidation was found to occur as a nonbranched chain reaction with quadratic-law chain termination in both neat
methyl oleate ([MO] ≈ 2.6 mol/l) and AES. The temperature dependence of the oxidizability parameter for methyl oleate in the
temperature range from 303 to 333 K was described by the following expressions:
$\begin{gathered}
in an Mo medium, log(k_2 (2k_6 )^{ - 0.5} ) = (2.0 \pm 0.5) - (27.5 \pm 3.2)\theta ^{ - 1} [l^{0.5} mol^{ - 0.5} s^{ - 0.5} ]; \hfill \\
and in the AES, log(k_2 (2k_6 )^{ - 0.5} ) = (2.4 \pm 0.4) - (29.4 \pm 2.1)\theta ^{ - 1} [l^{0.5} mol^{ - 0.5} s^{ - 0.5} ], \hfill \\
\end{gathered}$\begin{gathered}
in an Mo medium, log(k_2 (2k_6 )^{ - 0.5} ) = (2.0 \pm 0.5) - (27.5 \pm 3.2)\theta ^{ - 1} [l^{0.5} mol^{ - 0.5} s^{ - 0.5} ]; \hfill \\
and in the AES, log(k_2 (2k_6 )^{ - 0.5} ) = (2.4 \pm 0.4) - (29.4 \pm 2.1)\theta ^{ - 1} [l^{0.5} mol^{ - 0.5} s^{ - 0.5} ], \hfill \\
\end{gathered} 相似文献
2.
The temperature dependencies of europium carbonate stability constants were examined at 15, 25, and 35°C in 0.68 molal Na+(ClO 4 ? , HCO 3 ? ) using a tributyl phosphate solvent extration technique. Our distribution data can be explained by the equilibria $$\begin{gathered} Eu^{3 + } + H_2 O + CO_2 (g)_ \leftarrow ^ \to EuCO_3^ + + 2H^ + \hfill \\ - log\beta _{12} = 9.607 + 496(t + 273.16)^{ - 1} \hfill \\ Eu^{3 + } + 2H_2 O + 2CO_2 (g)_ \leftarrow ^ \to Eu(CO_3 )_2^ - + 4H^ + \hfill \\ - log\beta _{24} = 21.951 + 670(t + 273.16)^{ - 1} \hfill \\ Eu^{3 + } + H_2 O + CO_2 (g)_ \leftarrow ^ \to EuHCO_3^{2 + } + H^ + \hfill \\ - log\beta _{11} = 1.688 + 1397(t + 273.16)^{ - 1} \hfill \\ \end{gathered}$$ 相似文献
3.
The effects of pH, temperature, acetyl acetone (acacH) concentration and substrate complex concentration on the rate of aqua
ligand substitution in the title complex in aqueous medium have been studied. The following rate expression is proposed for
the 5.0–6.5 pH range.
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