Kinetics of the Tetrahydrofuran Oxidation Initiated by 2,2'-Azo-<i>bis</i>-Isobutyronitrile

Abstract

The kinetic of the tetrahydrofuran oxidation initiated by 2,2'-azo-bis-isobutyronitrile in the temperature range 303–323 K are studied. The process rate was been monitored by oxygen absorption. It has shown that the tetrahydrofuran oxidation rate depends linearly on his concentration and proportional to the square root of the initiator concentration. The oxidizability parameter of tetrahydrofuran and the initiation rate constant by 2,2'-azo-bis-isobutyronitrile of the tetrahydrofuran oxidation are found: lg(k2(2k6)–0.5) = 4.3 – 44.1/θ [L0.5 mol–0.5 s–0.5], lg ki = 13.9 − 120.4/θ [s–1], where θ = 2.303 × 10–3RT kJ/mol. The rate constant (k7) of the reaction of the tetrahydrofuran peroxyl radical with α-tocopherol at temperature of 303 K is (4.0 ± 1.1) × 105 L mol–1 s–1.