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Lignin Recovery from Spent Alkaline Pulping Liquors Using Acidification, Membrane Separation, and Related Processing Steps: A Review
North Carolina State Univ, Dept Forest Biomat,.
University Jyvaskyla, Finland.
FPInnovations, Canada.
Natl Res Council Canada.
Vise andre og tillknytning
2019 (engelsk)Inngår i: BioResources, ISSN 1930-2126, E-ISSN 1930-2126, Vol. 14, nr 1, s. 2300-2351Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The separation of lignin from the black liquor generated during alkaline pulping is reviewed in this article with an emphasis on chemistry. Based on published accounts, the precipitation of lignin from spent pulping liquor by addition of acids can be understood based on dissociation equilibria of weak acid groups, which affects the solubility behavior of lignin-related chemical species. Solubility issues also govern lignin separation technologies based on ultrafiltration membranes; reduction in membrane permeability is often affected by conditions leading to decreased solubility of lignin decomposition products and the presence of colloidal matter. Advances in understanding of such phenomena have potential to enable higher-value uses of black liquor components, including biorefinery options, alternative ways to recover the chemicals used to cook pulp, and debottlenecking of kraft recovery processes.

sted, utgiver, år, opplag, sider
NORTH CAROLINA STATE UNIV , 2019. Vol. 14, nr 1, s. 2300-2351
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Materialteknik
Identifikatorer
URN: urn:nbn:se:kau:diva-71492ISI: 000459494400158OAI: oai:DiVA.org:kau-71492DiVA, id: diva2:1296215
Tilgjengelig fra: 2019-03-14 Laget: 2019-03-14 Sist oppdatert: 2019-03-22bibliografisk kontrollert

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