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An easy and reliable method for syringyl:guaiacyl ratio mea

An easy and reliable method for syringyl:guaiacyl ratio measurement, TAPPI JOURNAL March 2017

Journal articles
Magazine articles
Open Access
Analysis of economically viable lignin-based biorefinery st

Analysis of economically viable lignin-based biorefinery strategies implemented within a kraft pulp mill, TAPPI JOURNAL March 2017

Journal articles
Magazine articles
Open Access
Editorial: Professional Networking in the Nonwovens and Technical Textiles Sector

Editorial: Professional Networking in the Nonwovens and Technical Textiles Sector

Journal articles
Magazine articles
Open Access
Generlized stead-state model for chlorine dioxide brightning

Generlized stead-state model for chlorine dioxide brightning of hardwood kraft pulps, TAPPI JOURNAL May 2017

Journal articles
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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
Magazine articles
Open Access
Comprehensive fault detection and isolation method applied t

Comprehensive fault detection and isolation method applied to a recovery boiler, TAPPI JOURNAL May 2016

Magazine articles
Open Access
How to use alum with cationic dispersed rosin size, TAPPI JO

How to use alum with cationic dispersed rosin size, TAPPI JOURNAL May 2016

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Magazine articles
Open Access
Psychophysical tests for visual-numerical correlation of whi

Psychophysical tests for visual-numerical correlation of whiteness formulas, TAPPI JOURNAL May 2016

Journal articles
Magazine articles
Open Access
Editorial: A preview of PEERS 2019, TAPPI Journal September 2019

ABSTRACT: Coming soon is PEERS • TAPPI’s annual Pulping, Engineering, Environmental, Recycling and Sustainability gathering for industry professionals. Held this October 27-30 in St. Louis, MO, the conference is co-located with the International Bioenergy & Bioproducts Conference (IBBC) and the 12th Research Forum on Recycling. Universities and research organizations from around the world are represented in the conference content, and below is a sampling of just a few of the many presentations that might interest TAPPI Journal readers.

Journal articles
Magazine articles
Open Access
Critical parameters for tall oil separation I: The importance of ration of fatty acids to rosin acids, TAPPI Journal September 2019

ABSTRACT: Tall oil is a valuable byproduct in chemical pulping of wood, and its fractions have a large spectrum of applications as chemical precursors, detergents, and fuel. High recovery of tall oil is important for the economic and environmental profile of chemical pulp mills. The purpose of this study was to investigate critical parameters of tall oil separation from black liquor. To investigate this in a controlled way, we developed a model test system using a “synthetic” black liquor (active cooking chemicals OH- and HS- ions), a complete process for soap skimming, and determination of recovered tall oil based on solvent extraction and colorimetric analysis, with good reproducibility. We used the developed system to study the effect of the ratio of fatty acids to rosin acids on tall oil separation. When high amounts of rosin acids were present, tall oil recovery was low, while high content of fatty acids above 60% significantly promoted tall oil separation. Therefore, manipulating the content of fatty acids in black liquor before the soap skimming step can significantly affect the tall oil solubility, and hence its separation. The findings open up chemical ways to improve the tall oil yield.

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