Lignin Prepared by Ultrafiltration of Black Liquor: Investigation of Solubility, Viscosity, and Ash Content

Giummarella, NicolaKTH,Träkemi och massateknologi,Wallenberg Wood Science Center,CleanFlow Black AB, Sweden (författare)

Lignin Prepared by Ultrafiltration of Black Liquor : Investigation of Solubility, Viscosity, and Ash Content

QC 20160610
Technical lignin, which can be potentially obtained in large amounts as a by-product from kraft pulping, represents a potential resource for manufacturing fuels and chemicals. Upgrading of lignin, by lowering its molecular weight, is a valuable alternative to precipitation from black liquor, which occurs in the Lignoboost process. The solubility properties of Lignoboost lignin and filtered lignin in a number of technically feasible solvents were compared, and it was found that both lignins were dissolved in similar solvents. With the exception of furfural, the best lignin solvents generally were organic solvents miscible with water, such as methanol. It was possible to dissolve more filtered lignin in higher concentrations than Lignoboost lignin; additionally, the viscosities of the filtered lignin solutions were also considerably lower than those of Lignoboost lignin, especially at higher concentrations. Methods for non-organic component removal from filtrated lignin were tested, and it was concluded that several cold acidic treatments after dewatering can lower the ash content to values below 0.5% by weight.

LANTBRUKSVETENSKAPER Lantbruksvetenskap, skogsbruk och fiske Trävetenskap hsv//swe
AGRICULTURAL SCIENCES Agriculture, Forestry and Fisheries Wood Science hsv//eng
Lignin
Ultrafiltration
Liquid biofuel
Solubility
Viscosity
Ash content
Fiber- och polymervetenskap
Fibre and Polymer Science

Lindgren, ChristoferCleanFlow Black AB, Sweden (författare)
Lindström, MikaelKTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center,CleanFlow Black AB, Sweden(Swepub:kth)u1uxn4q9 (författare)
Henriksson, GunnarKTH,Fiber- och polymerteknologi,Wallenberg Wood Science Center(Swepub:kth)u1lkf75c (författare)
KTHTräkemi och massateknologi (creator_code:org_t)

Ingår i:BioResources: North Carolina State University11:2, s. 3494-35101930-2126

Av författaren/redakt...: Giummarella, Nic ...; Lindgren, Christ ...; Lindström, Mikae ...; Henriksson, Gunn ...

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LANTBRUKSVETENSKAPER: LANTBRUKSVETENSK ...; och Lantbruksvetensk ...; och Trävetenskap

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