Organosolv pulping of olive tree trimmings by use of ethylene glycol/soda/water mixtures
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L. Jiménez
Abstract
This paper reports on the influence of independent variables in the ethylene glycol/soda pulping of olive wood trimmings (165–195°C, 30–90 min, ethylene glycol concentration 5–15%, soda concentration 2.5–7.5% and liquid/solid ratio 4–6), on the yield and Kappa index of the pulps and the strength properties (breaking length, burst index and tear index) of paper sheets. By using a central composite factorial design, equations that relate each dependent variable to the different independent variables were obtained which reproduced the experimental results for the dependent variables with errors less than 12%. Using a temperature of 184°C, ethylene glycol and soda concentrations of 15% and 7%, respectively, a liquid/solid ratio of 5:1 and a cooking time of 30 min results in yield, Kappa index, breaking length, burst index and tear index values that depart by 14.3%, 8.2%, 17.1%, 17.0% and 2.3%, respectively, from their optimum levels. These conditions result in substantial savings in power consumption and immobilised capital investments as they involve a lower temperature, a lower liquid/solid ratio, and a shorter time than the maximum values tested.
Copyright © 2004 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Variation in content and composition of lignin in young wood of Norway spruce
- Polyoxometalate oxidation of non-phenolic lignin subunits in water: Effect of substrate structure on reaction kinetics
- Organosolv pulping of olive tree trimmings by use of ethylene glycol/soda/water mixtures
- Cooperativity analysis of the in situ lignin glass transition
- Fitting parameters for softening of wet wood under quasi static loading
- Measurement of moisture content profiles during drying of Scots pine using magnetic resonance imaging
- Influence of temperature on the modulus of elasticity (MOE) of Pinus sylvestris L.
- A contact free measurement method to determine internal stress states in glulam
- Internal stresses in the cross-grain direction in glulam induced by climate variations
- Variation in microfibril angle in Eucalyptus clones
- Durability of untreated Norway spruce (Picea abies) exposed outdoors above ground for nine years
- Microbial colonizers of freshly sawn yellow-poplar (Liriodendron tulipifera L.) lumber in two seasons: Part 1. Fungi
- Microbial colonizers of freshly sawn yellow-poplar (Liriodendron tulipifera L.) lumber in two seasons: Part 2. Bacteria
- Antifungal activity of constituents from the heartwood of Gmelina arborea: Part 1. Sensitive antifungal assay against Basidiomycetes
- Identification of volatile organic compounds (VOCs) from bacteria and yeast causing growth inhibition of sapstain fungi
- Identification of Serpula lacrymans and other decay fungi in construction timber by sequencing of ribosomal DNA – A practical approach
- Wood/plastic ratio: Effect on performance of borate biocides against a brown rot fungus
- Book Review
- Personalia
