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Pulping characteristics of Eucalyptus saligna/grandis growing in Uganda

Pulping characteristics of Eucalyptus saligna/grandis growing in Uganda

Palmer, E. R. and Gibbs, J. A. (1984) Pulping characteristics of Eucalyptus saligna/grandis growing in Uganda. Tropical Development and Research Institute (TDRI), London, UK. ISBN 0859541894

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Abstract

Three samples of Eucalyptus saligna/grandis grown in Uganda were examined to determine wood density, chemical composition, fibre dimensions, and pulping characteristics by the sulphate process. The samples were of 9-year-old trees and 17-year-old trees from the Kajansi Forest Reserve, and 11-year-old trees from Nagojje Forest Reserve. The differences in wood density, chemical composition.and fibre dimensions were small and unlikely to be significant in commerical production, but there were indications that both age of sample and growing conditions affect wood density, fibre dimensions and the strength characteristics of pulp. All three samples when pulped by the sulphate process yielded more than 50% of a bleachable pulp with good strength characteristics. Pulp from the 9-year-old sample from Kajansi had the highest bonding strength; that from the 17-year-old sample from Kajansi the highest tearing strength; that from the 11-year-old sample from Nagojje was weakest in all respects. The pulps could be bleached by a four-stage process of successive applications of chlorine, sodium hydroxide, sodium hypochlorite and chlorine dioxide to yield pulps with satisfactory brightness (86, Mg0=1 00) and with strength properties only a little lower than those of unbleached pulps.

Item Type: Book
Uncontrolled Keywords: pulp, characteristic, Eucalyptus saligna, Eucalyptus grandis, Uganda, eucalyptus, density
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
Related URLs:
Last Modified: 28 Jun 2016 08:59
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/12051

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