Inventory audit notice: TAPPI Press orders will not be processed from August 21–28 during our fiscal year-end inventory audit. Orders placed during this time will ship starting August 31, in the order received. Normal payment processing also resumes August 31.

Thanks for your patience — this helps us serve our members better.

Search

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

Showing 91–100 of 1,019 results (Duration : 0.009 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
Magazine articles
TAPPI Journal Summaries, Paper360º September/October 2019

TAPPI Journal Summaries, Paper360º September/October 2019

Journal articles
Magazine articles
Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019

Pulp and Paper: Industries with a Bright Future, Paper360º January/February 2019

Journal articles
Magazine articles
North America’s First Tree-Free Pulp Mill, Paper360º March/April 2019

North America’s First Tree-Free Pulp Mill, Paper360º March/April 2019

Journal articles
Magazine articles
Fastmarkets RISI’s 2019 Asian CEO of the Year: Susumu Yajima, Oji Holdings Corporation, Paper360 May/June 2019

Fastmarkets RISI’s 2019 Asian CEO of the Year: Susumu Yajima, Oji Holdings Corporation, Paper360 May/June 2019

Journal articles
Magazine articles
TAPPI Journal Summaries, Paper360 May/June 2019

TAPPI Journal Summaries, Paper360 May/June 2019

Journal articles
Coated Papers in Asia Pacific, Paper360º May/June 2014

Coated Papers in Asia Pacific, Paper360º May/June 2014

Journal articles
Magazine articles
Extending Its Reach, Paper360º, July/August 2017

Extending Its Reach, Paper360º, July/August 2017

Journal articles
Conference Review - PAPTAC 94th Annual Meeting, Progress in Paper Recycling, Vol. 17, No. 4, August 2008

Conference Review - PAPTAC 94th Annual Meeting, Progress in Paper Recycling, Vol. 17, No. 4, August 2008

Journal articles
Open Access
Qualification of Welding Procedures for Duplex Stainless Ste

Qualification of Welding Procedures for Duplex Stainless Steels, 1999 Engineering Conference Proceedings

Inside this Section