Search

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

Showing 41–50 of 567 results (Duration : 0.008 seconds)

Filters

Industry

Topics

Content Type

Publications

Level of Knowledge

Committees

Collections

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.

Journal articles
Open Access
Acid-insoluble and acid-soluble lignin characteristics in kraft pulping of hybrid salix clones, TAPPI JOURNAL August 1988

Acid-insoluble and acid-soluble lignin characteristics in kraft pulping of hybrid salix clones, TAPPI JOURNAL August 1988

Journal articles
Open Access
Nonwood fiber: Number 2, and trying harder-An interview with Dr. Joseph E. Atchison, TAPPI JOURNAL August 1988

Nonwood fiber: Number 2, and trying harder-An interview with Dr. Joseph E. Atchison, TAPPI JOURNAL August 1988

Journal articles
Open Access
A wet-laid process for the preparation of random fiber-reinforced composites, TAPPI JOURNAL August 1988

A wet-laid process for the preparation of random fiber-reinforced composites, TAPPI JOURNAL August 1988

Journal articles
Open Access
A fast-track approach through the design and permit phases for an ash landfill, TAPPI JOURNAL August 1988

A fast-track approach through the design and permit phases for an ash landfill, TAPPI JOURNAL August 1988

Journal articles
Open Access
Significance of PM10 regulations for the forest products industry, TAPPI JOURNAL August 1988

Significance of PM10 regulations for the forst products industry, TAPPI JOURNAL August 1988

Journal articles
Open Access
Fibers properties and tearing resistance, TAPPI JOURNAL February 1988 88FEB103

Fibers properties and tearing resistance, TAPPI JOURNAL February 1988

Journal articles
Open Access
Meltblown polyester solves a food processing filtration problem, TAPPI JOURNAL February 1988 88FEB79

Meltblown polyester solves a food processing filtration problem, TAPPI JOURNAL February 1988

Journal articles
Open Access
The influence of headbox flow conditions on paper properties and their constancy, TAPPI JOURNAL February 1988 88FEB93

The influence of headbox flow conditions on paper properties and their constancy, TAPPI JOURNAL February 1988

Journal articles
Open Access
High-solids black liquor combustion-Tampella's Super Combustion system, TAPPI JOURNAL January 1988 88JAN107

High-solids black liquor combustion-Tampella's Super Combustion system, TAPPI JOURNAL January 1988

Inside this Section