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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
Factors controlling the passage of fibers through slots, TAPPI JOURNAL, May 1998, Vol. 81(5)
Factors controlling the passage of fibers through slots, TAPPI JOURNAL, May 1998, Vol. 81(5)
Journal articles
New technology for papermaking: Commercializing biopulping, TAPPI JOURNAL, November 1998, Vol. 81(11)
New technology for papermaking: commercializing biopulping, TAPPI JOURNAL, November 1998, Vol. 81(11)
Journal articles
Paper science and engineering programs - a comparison of the curricula, TAPPI JOURNAL, October 1998, Vol.81(10)
Paper science and engineering programs - a comparison of the curricula, TAPPI JOURNAL, October 1998, Vol.81(10)
Journal articles
A business-oriented approach to maintenance, TAPPI JOURNAL, September 1998, Vol. 81(9)
On management: a business-oriented approach to maintenance, TAPPI JOURNAL, September 1998, Vol. 81(9)
Journal articles
Shop talk: Implementing an effective boilout program, TAPPI JOURNAL, September 1998, Vol. 81(9)
Shop talk: implementing an effective boilout program, TAPPI JOURNAL, September 1998, Vol. 81(9)
Journal articles
Energy efficient motor and drive systems: Your path to profit, TAPPI JOURNAL, September 1998, Vol. 81(9)
Energy efficient motor and drive systems: your path to profit, TAPPI JOURNAL, September 1998, Vol. 81(9)
Journal articles
The Effects of cyclic axial loading of single wood pulp fibers at elevated temperature and humidity, TAPPI JOURNAL, April 1999, Vol. 82(4)
The Effects of cyclic axial loading of single wood pulp fibers at elevated temperature and humidity, TAPPI JOURNAL, April 1999, Vol. 82(4)
Journal articles
The top six forces shaping electrical distribution and management in the pulp and paper Industry, TAPPI JOURNAL, September 1999, Vol. 82(9)
The top six forces shaping electrical distribution and management in the pulp and paper Industry, TAPPI JOURNAL, September 1999, Vol. 82(9)
Journal articles
Magazine articles
Effects of different ammonium lignosulfonate contents on the crystallization, rheological behaviors, and thermal and mechanical properties of ethylene propylene diene monomer/polypropylene/ammonium lignosulfonate composites, TAPPI Journal January 2020
ABSTRACT: Thermoplastic elastomer (TPE), made from ethylene propylene diene monomer (EPDM) and polypropylene (PP) based on reactive blending, has an excellent processing performance and characteristics and a wide range of applications. However, there are currently no reports in the literature regarding the usage of TPE in making composite boards. In this paper, EPDM, PP, and ammonium lignosulfonate (AL) were used as the raw materials, polyethylene wax was used as the plasticizer, and a dicumyl peroxide vulcanization system with dynamic vulcanization was used to make a new kind of composite material. This research studied the influences of the AL contents on the crystallization behaviors, rheological properties, thermal properties, and mechanical properties of the composites. The results showed that the AL content had a noticeable impact on the performance of the composite board. Accordingly, this kind of composite material can be used as an elastomer material for the core layer of laminated flooring.