Abstract
A laboratory-scale study was made on bleaching the kraft pulp by using peracetic acid solution.This method results in a higher yield of pulp with better strength properties than the pulp bleached by the usual multistage process, but with some poorer color reversion.
The higher yield obtained during peracetic acid bleaching compared with the multistage bleaching, is due to a higher yield of hemicellulose in the peracid bleached pulp than the multistage bleached pulp.
High charge of chemicals and short time of processing are advisable for good bleaching results, sinceat less charge of reagents and for long time tedious side reaction occurs.
The effect of moisture content of pulp and reaction temperature were investigated with some advantages.
