Search

Use the search bar or filters below to find any TAPPI product or publication.

Showing 1,341–1,350 of 1,737 results (Duration : 0.009 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

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
Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015

Characterization of refined papermaking pulps using hydrodynamic parameters from filtration analysis, TAPPI JOURNAL May 2015

Journal articles
Open Access
A tour of Scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)

A tour of scandinavian research facilities sparks ideas for cooperation, TAPPI JOURNAL, January 1998, Vol. 81(1)

Journal articles
Open Access
Building a defect-free reel on the paper machine, TAPPI JOURNAL, July 1998, Vol. 81(7)

Building a defect-free reel on the paper machine, TAPPI JOURNAL, July 1998, Vol. 81(7)

Journal articles
Open Access
Pectic acids in the production of wood-containing paper, TAPPI JOURNAL, July 1998, Vol. 81(7)

Pectic acids in the production of wood-containing paper, TAPPI JOURNAL, July 1998, Vol. 81(7)

Journal articles
Open Access
Pitch deposition in newsprint mills using certain kaolin pigments, TAPPI JOURNAL, July 1998, Vol. 81(7)

Pitch deposition in newsprint mills using certain kaolin pigments, TAPPI JOURNAL, July 1998, Vol. 81(7)

Journal articles
Open Access
Stora inaugurates PM2 at Port Hawkesbury, TAPPI JOURNAL, July 1998, Vol. 81(7)

Stora inaugurates pm2 at port hawkesbury, TAPPI JOURNAL, July 1998, Vol. 81(7)

Journal articles
Open Access
Paper machines of tomorrow: drying to speed, TAPPI JOURNAL, July 1998, Vol. 81(7)

Paper machines of tomorrow: drying to speed, TAPPI JOURNAL, July 1998, Vol. 81(7)

Journal articles
Open Access
The role of paper chemicals in increasing machine speeds, TAPPI JOURNAL, July 1998, Vol. 81(7)

The role of paper chemicals in increasing machine speeds, TAPPI JOURNAL, July 1998, Vol. 81(7)

Inside this Section