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Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)
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Riikka Rautiainen
Published/Copyright:
December 4, 2009
Abstract
Formation of hydroxy acids and soluble lignin fragments was investigated during conventional kraft pulping of first-thinning Scots pine (Pinus sylvestris L.) stem wood and its long-fiber outer part and short-fiber inner part. The results indicate that there are characteristic differences in the formation of hydroxy acids in these specific tissues, due to the slightly different contents of cellulose, hemicelluloses, and lignin. Notable are the differences in the formation of xylan-derived acids (2-hydroxybutanoic and xyloisosaccharinic acids) and glucomannan- and cellulose-derived acids (3,4-dideoxy-pentonic and glucoisosaccharinic acids). In contrast, no significant differences were found in the average molecular masses of the dissolved lignins in these black liquors. Finally, the black liquor from the outer part of first-thinning pine was shown to have similar properties as the black liquor from the reference mature wood material.
Keywords: aliphatic acids; black liquor; first-thinning; hydroxy acids; lignin; molecular mass; Scots pine
Received: 2009-3-26
Accepted: 2009-7-29
Published Online: 2009-12-04
Published Online: 2009-12-07
Published in Print: 2010-01-01
©2010 by Walter de Gruyter Berlin New York
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Articles in the same Issue
- Original Papers
- Initiating ECF bleaching sequences of eucalyptus kraft pulps with Z/D and Z/E stages
- Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)
- Analysis of products from the oxidation of technical lignins by oxygen and H3PMo12O40 in water and aqueous methanol by size-exclusion chromatography
- Oxidative polymerisation of models for phenolic lignin end-groups by laccase
- Determination of anionic groups in wood by time-of-flight secondary ion mass spectrometry and laser ablation-inductively coupled plasma-mass spectrometry
- Effects of sample preparation on NIR spectroscopic estimation of chemical properties of Eucalyptus urophylla S.T. Blake wood
- Detection of wet-pockets on the surface of Tsuga heterophylla (Raf.) Sarg. by near infrared (NIR) spectroscopy
- Cellular distribution of coniferin in differentiating xylem of Chamaecyparis obtusa as revealed by Raman microscopy
- Hydrolysis of cellulose and wood powder treated with DMDHEU by a hydrolase enzyme complex, Fenton's reagent, and in a liquid culture of Trametes versicolor
- Effects of timing and intensity of thinning on wood structure and chemistry in Norway spruce
- Effects of calcium-based materials and iron impurities on wood degradation by the brown rot fungus Serpula lacrymans
- Lignin and carbohydrate variation with earlywood, latewood, and compression wood content of bent and straight ramets of a radiata pine clone
- Tensile stress relaxation of wood impregnated with different ACQ formulations at various temperatures
- Estimate of resistance-curve in wood through the double cantilever beam test
- Moisture-induced stresses and distortions in spruce cross-laminates and composite laminates
- Short Note
- Recovery of cellulose and xylan liquefied in ionic liquids by precipitation in anti-solvents
- Meetings
- Meetings
Keywords for this article
aliphatic acids;
black liquor;
first-thinning;
hydroxy acids;
lignin;
molecular mass;
Scots pine
Articles in the same Issue
- Original Papers
- Initiating ECF bleaching sequences of eucalyptus kraft pulps with Z/D and Z/E stages
- Characterization of black liquors from kraft pulping of first-thinning Scots pine (Pinus sylvestris L.)
- Analysis of products from the oxidation of technical lignins by oxygen and H3PMo12O40 in water and aqueous methanol by size-exclusion chromatography
- Oxidative polymerisation of models for phenolic lignin end-groups by laccase
- Determination of anionic groups in wood by time-of-flight secondary ion mass spectrometry and laser ablation-inductively coupled plasma-mass spectrometry
- Effects of sample preparation on NIR spectroscopic estimation of chemical properties of Eucalyptus urophylla S.T. Blake wood
- Detection of wet-pockets on the surface of Tsuga heterophylla (Raf.) Sarg. by near infrared (NIR) spectroscopy
- Cellular distribution of coniferin in differentiating xylem of Chamaecyparis obtusa as revealed by Raman microscopy
- Hydrolysis of cellulose and wood powder treated with DMDHEU by a hydrolase enzyme complex, Fenton's reagent, and in a liquid culture of Trametes versicolor
- Effects of timing and intensity of thinning on wood structure and chemistry in Norway spruce
- Effects of calcium-based materials and iron impurities on wood degradation by the brown rot fungus Serpula lacrymans
- Lignin and carbohydrate variation with earlywood, latewood, and compression wood content of bent and straight ramets of a radiata pine clone
- Tensile stress relaxation of wood impregnated with different ACQ formulations at various temperatures
- Estimate of resistance-curve in wood through the double cantilever beam test
- Moisture-induced stresses and distortions in spruce cross-laminates and composite laminates
- Short Note
- Recovery of cellulose and xylan liquefied in ionic liquids by precipitation in anti-solvents
- Meetings
- Meetings
