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A novel approach for determining the reactivity of dissolving pulp based on the COD method

ABSTRACT: A novel approach for determining the reactivity of dissolving pulp according to the chemical oxygen demand (COD) of water has been discussed. First, a sample of dissolving pulp was subjected to mercerization and xanthation in order to obtain dissolved cellulose fractions. Next, the fractions were digested with a testing solution as applied in COD procedures. Finally, the resulting liquid was rapidly tested by ultraviolet-visible spectrophotometry (UV-Vis). By quantifying the absorbance of Cr3+ at a wavelength of 600 nm, the reactivity of dissolving pulp was indirectly calculated. The results measured by this novel COD method correlated well with the most accepted Fock test results with less than 10% relative difference. Meanwhile, this newly developed COD method required less time-consuming procedures as compared to the Fock test.

Journal articles
Magazine articles
Open Access
Impact of dissolved matter in the oxygen delignifcation stag

Impact of dissolved matter in the oxygen delignifcation stage, TAPPI JOURNAL May 2017

Journal articles
Open Access
Virtual Bleach Plants part 1. mill applications, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (144KB)

Virtual Bleach Plants part 1. mill applications, Solutions! & TAPPI JOURNAL, June 2003, Vol. 2(6) (144KB)

Journal articles
Open Access
Minimizing baso4 scale formation In ecf bleach plants, TAPPI JOURNAL, March 2003, Vol. 2(3) (119KB)

Minimizing baso4 scale formation In ecf bleach plants, Solutions! & TAPPI JOURNAL, March 2003, Vol. 2(3) (119KB)

Journal articles
Open Access
The role of evaporative dewatering in impulse pressing, TAPPI JOURNAL, March 2003, Vol. 2(3) (185KB)

The role of evaporative dewatering in impulse pressing, TAPPI JOURNAL, March 2003, Vol. 2(3) (185KB)

Journal articles
Open Access
Enhancing kraft pulping through unconventional, higher sulfide-containing pretreatment liquorsâ??A review, TAPPI JOURNAL, Online Exclusive, March 2003, Vol. 2(3) (347KB)

Enhancing kraft pulping through unconventional, higher sulfide-containing pretreatment liquors–A review, TAPPI JOURNAL, Online Exclusive, March 2003, Vol. 2(3) (347KB)

Journal articles
Open Access
Hexenuronic acid contents of eucalyptus globulus kraft pulps: variation with pulping conditions and effect on ecf bleachability, Solutions! & TAPPI JOURNAL, May 2003, Vol. 2(5) (188KB)

Hexenuronic acid contents of eucalyptus globulus kraft pulps: variation with pulping conditions and effect on ecf bleachability, Solutions! & TAPPI JOURNAL, May 2003, Vol. 2(5) (188KB)

Journal articles
Open Access
Analysis of laboratory beating by fiber settling time frequency distributions, TAPPI JOURNAL, November 2003, Vol. 2(11) (105KB)

Analysis of laboratory beating by fiber settling time frequency distributions, Solutions! & TAPPI JOURNAL, November 2003, Vol. 2(11) (105KB)

Journal articles
Open Access
Current status of the pure oxygen activated sludge process in Canadian mills, TAPPI JOURNAL, November 2003, Vol. 2(11) (124KB)

Current status of the pure oxygen activated sludge process in Canadian mills, Solutions! & TAPPI JOURNAL, November 2003, Vol. 2(11) (124KB)

Journal articles
Open Access
Virtual bleach plants, Part 3: Caustic extraction and peroxide bleaching models, TAPPI JOURNAL, October 2003, Vol. 2(10) (280KB)

Virtual bleach plants, Part 3: Caustic extraction and peroxide bleaching models, Solutions! & TAPPI JOURNAL, October 2003, Vol. 2(10) (280KB)

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