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http://dx.doi.org/10.5658/WOOD.2016.44.1.147

Effect of Sugarcane Bagasse Soda-AQ Pulp Bleaching Properties by Type of Chelate Compounds and Simultaneous Process of (DQ) Stage  

Lee, Jai-Sung (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University)
Shin, Soo-Jeong (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.44, no.1, 2016 , pp. 147-155 More about this Journal
Abstract
Pulp made from sugarcane bagasse (SCB) was bleached in element chlorine free (ECF) sequence. The peroxide bleaching process for the final bleaching process has been introduced in order to reduce the use of chlorine dioxide. Prior to peroxide bleaching, different chelating chemicals were applied. When 4.5% of the total chlorine dioxide was used, bleached SCB pulp using additional DTPA chelate stage (DEDQP) resulted in 87.0% of the ISO brightness. However, bleached pulp using simultaneous stage of DTPA chelate and chlorine dioxide (DE(DQ)P) was reached at 83.9% of the ISO brightness. The viscosity of DEDQP bleached pulp was 25.6 cPs, and the one of DE(DQ)P bleached pulp was 21.9 cPs. Decreasing of chelate effect by chlorine dioxide led to a decrease in the final brightness and a lower viscosity. But simultaneous stage of EDTA chelate and chlorine dioxide (DE(DQ)P) led to higher final brightness (87.0% ISO) and higher viscosity (25.8 cPs) than those of the $DEDQ_{EDTA}P$ bleached pulp (86.4% ISO, 25.2 cPs).
Keywords
element chlorine free; hydrogen peroxide; bleaching; chelate treatment;
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Times Cited By KSCI : 7  (Citation Analysis)
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