Abstract: In this paper,hydrogen peroxide was applied to strengthen the oxygen delignification of wheat straw pulp and the influencing factors were studied.We also investigated the TCF bleaching of wheat straw pulp using an OpQP sequence.The results showed that adding peroxide to pulp has a notable effect on oxygen alkaline bleaching process.The efficiency and selectivity of oxygen delignification are improved.The optimal technological conditions of oxygen alkaline bleaching with adding hydrogen peroxide are as follows: oxygen pressure 0.5 MPa,temperature 100℃,H2O2 charge 1.5%,NaOH charge 4%,MgSO4 charge 0.5%,reaction time 60 min,pulp consistency 10%.The OpQP bleaching result indicated that the H2O2 reinforced delignification can improve the bleachability and brightness stability of the pulp,but reduce slightly the strength of the paper.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 3
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