Palmer, E.R., Gibbs, J.A., Ganguli, S. and Dutta, A.P. (1989) Pulping characteristics of Eucalyptus species grown in Malawi (ODNRI Bulletin No. 33). [Working Paper]

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Abstract

Eight species of Eucalyptus, E. camaldulensis, E. citriodora, E. cloeziana, E. grandis, E. maculata, E. maidenii, E. saligna and F. tereticornis grown in the Viphya plateau, Malawi, were examined to determine their suitability for the production of papermaking pulp. The size of 9-year-old trees, wood density, chemical characteristics and fibre dimensions are reported. All species were pulped by sulphate, soda and soda-anthraquinone processes. By the sulphate process all species yielded over 45% (two over 50%) of bleachable pulp with good strength characteristics. The soda-anthraquinone process yielded similar quantities of pulp, with the same kappa number and marginally lower strength characteristics. The soda process needed a more severe chemical dose to yield less pulp, with the same kappa number and much lower strength characteristics. All species were pulped, also, by the neutral sulphite semi-chemical process to yield about 70% of pulp suitable for use in packaging grades of board. One digestion by the chemi-refiner mechanical process on E. grandis indicated that, if conditions were optimized, pulps produced by this process should be suitable for the production of newsprint.

Item Type:	Working Paper
Additional Information:	[1] ISBN: 0 85954 69-6.
Uncontrolled Keywords:	forestry products, pulping characteristics, eucalyptus, Malawi, E. camaldulensis, E. citriodora, E. cloeziana, E. grandis, E. maculata, E. maidenii, E. saligna, E. tereticornis, Viphya plateau, papermaking
Subjects:	S Agriculture > S Agriculture (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > Natural Resources Institute Faculty of Engineering & Science > Natural Resources Institute > Food & Markets Department
Related URLs:	Organisation
Last Modified:	28 Nov 2019 15:47
URI:	http://gala.gre.ac.uk/id/eprint/11065

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