The mechanism and kinetics of the initiation of polymerisation by systems containing hydrogen peroxide

The potential controlled Fenton reaction at liquid|liquid interfaces as the source of hydroxyl radicals

“…The ferrocene derivative used as a reactant in the Fenton reaction, the (ferrocenylmethyl)trimethylammonium cation (TMFc þ ) with the hexabromomonocarborane anion [7,8,9,10,11,12-Br 6 -1-CB 11 H 6 ] À (CBB), was prepared from the iodide form of TMFc þ and CsCBB by extraction into chloroform and recrystallized from toluene. The tetrabutylammonium cation (TBA þ ) with the CBB À anion was prepared analogously from TBACl and CsCBB and was used as the base electrolyte in the organic phase of 1,2-dichloroethane.…”

“…The Fenton reaction has been known for quite a long time [8] and thoroughly studied from various angles [9][10][11] including electrochemical approaches [12,13]. For the purposes of our study and for subsequent application, the reactants, i.e., the ferrous ion and hydrogen peroxide, must be separated by the liquid interface in order that the reaction be controlled by potential driven transfer of the charged reactant across the interface into the other phase where the Fenton reaction takes place.…”

The Thermal Decomposition of Peracetic Acid in the Vapor Phase

“…This is due in part to the lack of a suitable source of hydroxyl radicals. Several methods have been used to produce t h e radicals, e.g, electric discharge through water vapor (I), electron transfer reactions in aqueous solution (2), and the thermal and photochemical decomposition of hydrogen peroxide (3) and alkyl hydroperoxide (4), but all of these methods have many disadvantages. -I t was considered possible that peracetic acid might be a convenient source of hydroxyl radicals both in the gas phase and in solution, the radicals being formed by the sequence of reactions…”

Estudos cinéticos da catálise da reação de fenton por 3,5-di-terc-butil-catecol

“…No início da década de 1950, o modelo de Haber e Weiss foi aprimorado [9][10][11] , sendo estabelecida uma constante cinética média para a reação de k = 62 L mol -1 s -1 a 25ºC.…”