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Journal articles
Magazine articles
Open Access
Displacement washing of softwood pulp cooked to various levels of residual lignin content, TAPPI Journal September 2021

ABSTRACT: This study investigates the influence of the degree of delignification of kraft spruce pulp cooked at seven different kappa numbers, ranging from 18.1 to 50.1, on the efficiency of displacement washing under laboratory conditions. Although the pulp bed is a polydispersive and heterogeneous system, the correlation dependence of the wash yield and bed efficiency on the Péclet number and the kappa number of the pulp showed that washing efficiency increased not only with an increasing Péclet number, but also with an increasing kappa number. The linear dependence between the mean residence time of the solute lignin in the bed and the space time, which reflects the residence time of the wash liquid in the pulp bed, was found for all levels of the kappa number. Washing also reduced the kappa number and the residual lignin content in the pulp fibers.

Journal articles
Open Access
Tissue roll handling with an agvs, TAPPI JOURNAL, February 2000, Vol. 83(2)

Tissue roll handling with an agvs, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
Calcium in pulping and bleaching, TAPPI JOURNAL, December 2000, Vol. 83(12)

Calcium in pulping and bleaching, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Great northern paper revitalizes millinocket mill, TAPPI JOURNAL, December 2000, Vol. 83(12)

Great northern paper revitalizes millinocket mill, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Open Access
Innovations in forming earn brian attwood TAPPI's 2000 Gunnar Nicholson Gold Medal, TAPPI JOURNAL, February 2000, Vol. 83(2)

Innovations in forming earn brian attwood TAPPI's 2000 Gunnar Nicholson Gold Medal, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
Alkaline peroxide mechanical pulping of wheat straw part 1: factors influencing the brightness response in impregnation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Alkaline peroxide mechanical pulping of wheat straw part 1: factors influencing the brightness response in impregnation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Analysis of pulping data using the self-organizing map, TAPPI JOURNAL, July 2000, Vol. 83(7)

Analysis of pulping data using the self-organizing map, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Steambox comparator experiments: apparatus validation and investigation of steambox performance, TAPPI JOURNAL, September 2000, Vol. 83(9)

Steambox comparator experiments: apparatus validation and investigation of steambox performance, TAPPI JOURNAL, September 2000, Vol. 83(9)

Journal articles
Open Access
Effect of softwood kraft on a mechanical-chemical mixture sheet, TAPPI JOURNAL, October 2000, Vol. 83(10)

Effect of softwood kraft on a mechanical-chemical mixture sheet, TAPPI JOURNAL, October 2000, Vol. 83(10)

Journal articles
Open Access
Transition metal complexes: a new class of laccase mediators for pulp bleaching, TAPPI JOURNAL, October 2000, Vol. 83(10)

Transition metal complexes: a new class of laccase mediators for pulp bleaching, TAPPI JOURNAL, October 2000, Vol. 83(10)

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