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Soap separation: A new option for removal of NPEs
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
RISE - Research Institutes of Sweden, Bioeconomy, Biobased Materials.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
2018 (English)In: Pulping Engineering and Environmental Recycling Sustainability Conference, PEERS 2018: Technical Solutions for Today and Beyond, TAPPI Press , 2018, p. 272-277Conference paper, Published paper (Other academic)
Abstract [en]

Non-process elements (NPEs) are elements present in the process streams without taking part in the desired reaction. With increasing process closure and new NPE-rich input streams such as gasified bark in the lime kiln and the destruction of biosludge in the recovery boiler, the traditional purge points may prove insufficient. A new method to remove NPEs is suggested: Removal of NPEs from tall oil brine. The idea is based on the fact that many elements are enriched in the soap and separated from the black liquor but are later led back to the black liquor with the brine. The results showed strong enrichment of Ba, Ca, Mg, Mn, P and Zn in soap; an enrichment factor of 8 or higher was observed. Laboratory experiments where tall oil brine has been alkalized and subjected to a separation stage have been conducted. The laboratory experiments showed that more than 90% of Al, Ba, Mg, Mn and P precipitates and could be removed with the solid phase if alkalized to pH 11. The separation efficiency varied for Ca and Si from 70-85 %. To conclude, removal of non-process elements from tall oil brine is a promising new kidney, especially for P and Si.

Place, publisher, year, edition, pages
TAPPI Press , 2018. p. 272-277
Keywords [en]
Lime, Recycling, Separation, Tall oil, Laboratory experiments, Non process elements, Process streams, Recovery boilers, Separation efficiency, Soap separation, Sustainable development
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-38944Scopus ID: 2-s2.0-85064932940OAI: oai:DiVA.org:ri-38944DiVA, id: diva2:1319635
Conference
Pulping Engineering and Environmental Recycling Sustainability Conference 2018: Technical Solutions for Today and Beyond, PEERS 2018; Portland; United States; 28 October 2018 through 31 October 2018
Note

cited By 0

Available from: 2019-06-03 Created: 2019-06-03 Last updated: 2019-06-03Bibliographically approved

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