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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
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
The impact of oil burning on kraft recovery furnace so2 emissions, TAPPI JOURNAL, April 1991, Vol. 74(4)

The impact of oil burning on kraft recovery furnace so2 emissions, TAPPI JOURNAL, April 1991, Vol. 74(4)

Journal articles
Open Access
An overview of ferrography and its use in maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

An overview of ferrography and its use in maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
Alternative methods for bleaching post consumer waste papers, TAPPI JOURNAL, August 1991, Vol. 74(8)

Alternative methods for bleaching post consumer waste papers, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
Bleaching of nonwood pulps: can sodium hydroxide be replaced with sodium carbonate in the alkaline extraction of nonwood pulps?, TAPPI JOURNAL, August 1991, Vol. 74(8)

Bleaching of nonwood pulps: can sodium hydroxide be replaced with sodium carbonate in the alkaline extraction of nonwood pulps?, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
On-machine maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

On-machine maintenance, TAPPI JOURNAL, August 1991, Vol. 74(8)

Journal articles
Open Access
New trends in deinking technology removing difficult inks from wastepaper, TAPPI JOURNAL, February 1991, Vol. 74(2)

New trends in deinking technology removing difficult inks from wastepaper, TAPPI JOURNAL, February 1991, Vol. 74(2)

Journal articles
Open Access
Color removal from kraft bleach-plant effluents by trichoderma sp., TAPPI JOURNAL, January 1991, Vol. 74(1)

Color removal from kraft bleach-plant effluents by trichoderma sp., TAPPI JOURNAL, January 1991, Vol. 74(1)

Journal articles
Open Access
Bleaching deinked pulps, TAPPI JOURNAL, January 1991, Vol. 74(1)

Bleaching deinked pulps, TAPPI JOURNAL, January 1991, Vol. 74(1)

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