Using of Magnesium Hydroxide and Sodium Hydroxide in DP Beaching of NaOH-AQ Wheat Straw Pulp

Wen Bo Wang; Fan Gong Kong; Shou Juan Wang; Ya Jie Zhong; Gui Hua Yang

doi:10.4028/www.scientific.net/AMR.690-693.1455

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 690-693Using of Magnesium Hydroxide and Sodium Hydroxide...

Using of Magnesium Hydroxide and Sodium Hydroxide in DP Beaching of NaOH-AQ Wheat Straw Pulp

Abstract:

Sodium hydroxide (NaOH) substituted by magnesium hydroxide (Mg(OH)2) as control agent and alkali source were investigated in chlorine dioxide bleaching and hydrogen peroxide bleaching of NaOH-AQ wheat straw pulp. The effects of alkali sources on pulp properties, including brightness and tensile strength, were investigated. The four experimental groups, including DNaOHPNaOH, DNaOHPMg(OH)2, D Mg(OH)2PNaOH and DMg(OH)2PMg(OH)2, were studied in this paper. The results showed that the brightness and tensile strength of DMg(OH)2PMg(OH)2 pulp was slightly lower than that of DNaOHPNaOH pulp. But there were more residual ClO2 and residual H2O2 in the effluents of DMg(OH)2PMg(OH)2 bleaching process than that in the effluents of DNaOHPNaOH bleaching process, which illustrated that DMg(OH)2PMg(OH)2 bleaching process had higher bleaching efficiency than DNaOHPNaOH bleaching process. The influence of Mg(OH)2 replacing NaOH was more obvious when it was used in the bleaching process of P stage than that in the D stage. The replacement of NaOH with Mg(OH)2 in D Stage can lower the dosage of alkali used in the following P stage.

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Periodical:

Advanced Materials Research (Volumes 690-693)

Pages:

1455-1460

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.690-693.1455

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Online since:

May 2013

Authors:

Wen Bo Wang, Fan Gong Kong, Shou Juan Wang, Ya Jie Zhong, Gui Hua Yang

Keywords:

Bleaching, Chlorine Dioxide, Hydrogen Peroxide, Magnesium Hydroxide, Wheat Straw Pulp

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References

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