Catalytic damage

In addition to the stabilizing action essential to effective bleaching, POLYRON PB has an exceptionally high sequestering capacity for heavy metal ions and prevents catalytic damage. 

Peroxide bleach stabilizer. Provides high sequestering effect to prevent catalytic damage. Yields absorbent fabric with low ash value and soft hand. Water soluble, no deposits on fabric or equipment. 

Uses Multifunctional prod, for pretreatment of cellulosics and its blends in exhaust applies. peroxide stabilizer to protect goods from alkali earth and transition metal catalytic damage rapid wetting agent wax/oil emulsifier disperses impurities in goods reduces scale deposition on equip. 

Photochemical smogs arise worldwide because of the action of sunlight on emissions from gasoline-powered vehicles. Decreased visibility, increased morbidity, and crop damage as a result of photochemical smogs led to introduction of the catalytic converter on automobiles in the United States. This has had only a small impact on the occurrence of photochemical smogs in the United States. 

Amaya ME, Watts AG, Damager 1, Wehenkel A, Nguyen T, Buschiazzo A, Paris G, Frasch AC, Withers SG, Alzari PM (2004) Structural insights into the catalytic mechanism of Trypanosoma cmzi tran.s-sialidase. Structure 12 775-784... 

The rate of peroxide decomposition and the resultant rate of oxidation are markedly increased by the presence of ions of metals such as iron, copper, manganese, and cobalt [13]. This catalytic decomposition is based on a redox mechanism, as in Figure 15.2. Consequently, it is important to control and limit the amounts of metal impurities in raw rubber. The influence of antioxidants against these rubber poisons depends at least partially on a complex formation (chelation) of the damaging ion. In favor of this theory is the fact that simple chelating agents that have no aging-protective activity, like ethylene diamine tetracetic acid (EDTA), act as copper protectors. 

Recently, it has been demonstrated that coordination vacancies on the surface metal cations are relevant to the unique redox reactivity of oxide surfaces]2]. Oxidation of fonnaldehyde and methyl formate to adsorbed formate intermediates on ZnO(OOOl) and reductive C-C coupling of aliphatic and aromatic aldehydes and cyclic ketones on 1102(001) surfaces reduced by Ar bombardment are observed in temperature-prognunmed desorption(TPD). The thermally reduced 1102(110) surface which is a less heavily damaged surface than that obtained by bombardment and contains Ti cations in the -t-3 and +4 states, still shows activity for the reductive coupling of formaldehyde to form ethene]13]. Interestingly, the catalytic cyclotrimerization of alkynes on TiO2(100) is also traced in UHV conditions, where cation coordination and oxidation states appear to be closely linked to activity and selectivity. The nonpolar Cu20( 111) surface shows a... 

---