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Wood extractives recovery from flotation of thermo-mechanical pulp process water


Singh, S and Stack, KR and Richardson, DE and Lewis, TW, Wood extractives recovery from flotation of thermo-mechanical pulp process water, Appita Journal, 72, (3) pp. 135-149. ISSN 1038-6807 (2019) [Refereed Article]

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Wood extractives were recovered by solvent extraction from a concentrated solution obtained from flotation of TMP process water. The influence of pH, solvent polarity and the cationic surfactant dodecyltrimethylammonium bromide (DTAB) were investigated. DTAB decreased the recovery of extractives presumably by binding them at the solvent-water interface. The effect of pH on recovery of wood extractives was consistent with the dissociation of resin and fatty acids, increasing their water-solubility at alkaline pH and limiting recovery by solvent extraction. The effect of solvent polarity on extraction reflected the polarity of resin and fatty acids. Triglycerides were poorly recovered overall which can be explained by their location at the core of wood extractive colloids and by hydrophobic interaction with DTAB. Maximum recovery of wood extractives was achieved by extraction with a 60:40 mixture of ethyl acetate and heptane at pH 6 which recovered 88 %, 36 % and 10 % of the resin acids, fatty acids and triglycerides respectively.

Item Details

Item Type:Refereed Article
Keywords:wood extractives, recovery, thermo-mechanical pulp, natural product, solvent extraction, solvent extraction
Research Division:Engineering
Research Group:Materials engineering
Research Field:Materials engineering not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in engineering
UTAS Author:Singh, S (Ms Sonita Singh)
UTAS Author:Stack, KR (Dr Karen Stack)
UTAS Author:Lewis, TW (Associate Professor Trevor Lewis)
ID Code:152614
Year Published:2019
Deposited By:Engineering
Deposited On:2022-08-22
Last Modified:2022-09-01

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