Effects of Chlorite Bleaching on D.P.Distribution of Wood Pulp

Abstract

A sample of half-bleached sulfate pulp (sample A) is bleached by means of chlorite (sample 13) and hypochlorite (sample C) respectively.D.P.distribution of these three samples is determined by the summative fractionation method, using cupri-ethylenediamine as solvent.The results obtained show that thoug the chlorite bleaching also shortens somewhat the chain lengths of cellulose the shape of distribution curv of (B) resembles to that of the original pulp (A), while the hypochlorite bleaching degradates the highe D.P.portion remarkably.
The summative fractionation method is approved as more convenient for the approximate estimation samples of alike species.