Reaction of sodium perborate with a chlorinated cyclic hindered amine (N-chloro-4-hydroxy-2,2,6,6-tetramethylpiperidine) II. Activating effects and related characteristics in practical fabric bleaching

A synergetic bleaching activation phenomenon of the chlorinated cyclic hindered amine, N-chloro-4-hydroxy-2,2,6,6-tetramethylpiperidine (TMP-Cl) on sodium perborate (PB) was examined under some practically applicable bleaching procedures. By combining TMP-Cl with PB, the bleaching effect toward black tea, fruit juices and other stains was enhanced synergetically, achieving an efficiency similar to that of the well-known tetraacetylethylenediamine/PB system. However, behavior observed in the TMP-Cl/PB system, such as high bleaching efficiency in an alkaline range, superior durability for repeated bleaching, less discoloration of cloth that contains reactive dyes and no influence on the activity of an enzyme, was favorable for a bleaching component of heavy-duty detergents.     

New coordination polymers. III: Oxidation of poly(vinyl alcohol) by permanganate ion in alkaline solutions. Kinetics and mechanism of formation of intermediate complex with a spectrophotometric detection of manganate(vi) transient species

The kinetics of formation of the [PVA. Mn^VIO] intermediate complex have been measured by the conventional spectrophotometric technique. The rate of formation of the complex was found to be given by the expression d[Complex]/dt = k₁[MnO-₄][PVA^?]. The results showed that the rate of formation is dependent on the base concentration. A first-order reaction in permanganate and fractional order with respect to the poly(vinyl alcohol) (PVA) concentration were observed. The activation parameters have been evaluated and a tentative reaction mechanism has been suggested.