The treatment of unbleached pulp with hydrogen peroxide after preliminary oxygen catalytic activation [4, 5] attracts the higher interest and can be considered as an alternative to EPO. These works show the study results of acid peroxide bleaching of pulp using peroxide molybdate catalysts: the optimization of eucalyptus pulp bleaching was carried out and the possibility of its use by involvement into industrial bleaching scheme EP-E-O3-D-P O-A-Z-D-P obtaining EP-P Mo-O3-D-P O-PMo-Z-D-P; the authors in study [5] have concluded that hydrogen
peroxide activated by molybdates can be considered selective bleaching agent, effective for delignification and removal of hexenuronic acids from hardwood pulp.