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Journal articles
Magazine articles
Open Access
Evaluation of soap recovery efficiency from black liquor — analytical tools, TAPPI Journal April 2023

ABSTRACT: Soap skimmings (“soap”) are typically recovered from black liquor in kraft mills that process a high percentage of softwood. In many mills, the recovery of soap is inefficient, negatively impacting performance of evaporators and recovery boilers and resulting in loss of potential revenue. A thorough evaluation of soap recovery performance in a kraft mill requires measurement of soap content in black liquor at various sampling locations, especially around the soap skimmer.The standard laboratory method for evaluating soap content in black liquor is a complex, multi-step process that relies on solvent extraction and titration; most mills send these samples to an outside laboratory for this analysis. In this study, 100 black liquor samples, with a wide range of soap concentrations, were tested by the standard solvent extraction method. After additional dilution, each sample was also tested for surface tension with a bubble pressure tensiometer. The results were found to correlate very closely with the solvent extraction tests results. This alternate method, using surface tension measurements of diluted black liquor samples, produces rapid results and can be easily implemented in most kraft mills, which would facilitate much more frequent in-house evaluations of soap recovery performance.

Journal articles
Open Access
Understanding coating strength at the molecular and microscopic level, TAPPI JOURNAL June 2015

Understanding coating strength at the molecular and microscopic level, TAPPI JOURNAL June 2015

Journal articles
Open Access
Australia's Paper and Forestry Forum: A Preview of Significant Issues for 1998-2008, TAPPI JOURNAL, January 1999, Vol. 83(5)

Australia's Paper and Forestry Forum: A Preview of Significant Issues for 1998-2008, TAPPI JOURNAL, January 1999, Vol. 83(5)

Journal articles
Open Access
Cutting Tool Materials, Manufacturing Processes, and Their Practical Effect on Sheeting and Slitting Quality, TAPPI JOURNAL, January 1999, Vol. 83(5)

Cutting Tool Materials, Manufacturing Processes, and Their Practical Effect on Sheeting and Slitting Quality, TAPPI JOURNAL, January 1999, Vol. 83(5)

Journal articles
Open Access
Shop Talk: The Smallest Details, TAPPI JOURNAL, January 1999, Vol. 83(5)

Shop Talk: The Smallest Details, TAPPI JOURNAL, January 1999, Vol. 83(5)

Journal articles
Open Access
TAPPI JOURNAL July 1999; Vol. 82; No. 7 - Improved Color and pH Control Using Adaptive Deadtime Compensation, TAPPI JOURNAL, July 1999, Vol. 82(7)

TAPPI JOURNAL July 1999; Vol. 82; No. 7 - Improved Color and pH Control Using Adaptive Deadtime Compensation, TAPPI JOURNAL, July 1999, Vol. 82(7)

Journal articles
Open Access
TAPPI JOURNAL July 1999; Vol. 82; No. 7 - ISO-Torq: The Next Generation of Rotating Consistency Transmitters, TAPPI JOURNAL, July 1999, Vol. 82(7)

TAPPI JOURNAL July 1999; Vol. 82; No. 7 - ISO-Torq: The Next Generation of Rotating Consistency Transmitters, TAPPI JOURNAL, July 1999, Vol. 82(7)

Journal articles
Open Access
Paper curl prediction and control using neural networks, TAPPI JOURNAL, July 1999, Vol. 82(7)

Paper curl prediction and control using neural networks, TAPPI JOURNAL, July 1999, Vol. 82(7)

Journal articles
Open Access
Using wavelets to determine paper formation by light transmission Image analysis, TAPPI JOURNAL, July 1999, Vol. 82(7)

Using wavelets to determine paper formation by light transmission Image analysis, TAPPI JOURNAL, July 1999, Vol. 82(7)

Journal articles
Open Access
Strain-based formulas for stresses in profiled center-wound rolls, TAPPI JOURNAL, July 1999, Vol. 82(7)

Strain-based formulas for stresses in profiled center-wound rolls, TAPPI JOURNAL, July 1999, Vol. 82(7)

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