Oxidising degradation of valonia extract and utilisation of the products. Part 1. Oxidising degradation of valonia extract and characterisation of the products

Oxidation using H2O2 brings about degradation of valonia extract. Three typ ical products with novel properties were obtained when 20%, 40% and 60% H2O 2 (conc. 50%) were used. Determinations indicated that the oxidising reacti on leads to lowering of molecular weight, lightening of colour, improving o f acid and salting-out resistances and increasing of hydrophilic groups, ca rboxyl in particular. The more interesting results are that penetrating rat es of the degraded products in pelt are markedly accelerated and that the a lkali resistance of complex compounds of the products and Cr(III) or Al(III ) is considerably increased. The effects above are enhanced with increasing offer of H2O2. The conditions for oxidising degradation are described and the potentials of utilising the products are discussed.