Effect on Bleaching Efficiency by Chelating Treatment in Sugarcane Bagasse DEDP Bleaching Process

Jai-Sung Lee; Woo-Yong Song; Jong-Moon Park; Soo-Jeong Shin

doi:10.7584/ktappi.2015.47.4.081

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Effect on Bleaching Efficiency by Chelating Treatment in Sugarcane Bagasse DEDP Bleaching Process 사탕수수 부산물 펄프의 DEDP 표백 시 킬레이트 전처리가 표백 효율에 미치는 영향

30 August 2015. pp. 81-87

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Abstract

Soda-AQ pulp made from sugarcane bagasse (SCB) were bleached in element chlorine free (ECF) sequence. To reduce chlorine dioxide use, final peroxide bleaching was introduced. Prior to peroxide bleaching, different chelating chemicals were applied for comparative analysis in ISO brightness and viscosity. When using equal total chlorine dioxide usage (4.5%), bleached SCB pulp using chelate and hydrogen peroxide (DEDQP) was reached 86.8% (DTPA), 86.4% (EDTA) ISO brightness, whereas bleached pulp using only hydrogen peroxide (DEDP) reached at 81.2% ISO brightness. Viscosity of DEDQP bleached pulp was 25.6 cPs (DTPA), 25.2 cPs (EDTA), And DEDP bleached pulp was shown 18.0 cPs viscosity. Decreasing of transition metal by chelate process led to improvements in final brightness along with higher viscosity. Due to EDTA is 5-7 times cheaper than DTPA, EDTA is recommended as chelating chemical prior to peroxide bleaching.

Keywords

ECF bleaching

brightness

chlorine dioxide

sugarcane bagasse

chelate

hydrogen peroxide

References

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Information

Publisher :Korea Technical Association of The Pulp and Paper Industry
Publisher(Ko) :한국펄프종이공학회
Journal Title :Journal of Korea TAPPI
Journal Title(Ko) :펄프종이기술
Volume : 47
No :4
Pages :81-87
Received Date : 2015-08-04
Revised Date : 2015-08-17
Accepted Date : 2015-08-19
DOI :https://doi.org/10.7584/ktappi.2015.47.4.081

Journal of Korea TAPPI ISSN:0253-3200(Print) 펄프종이기술

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Literature Cited