S. Abad, V. Santos, J. C. Parajó
Formic Acid-Peroxyformic Acid Pulping of Aspen Wood: An Optimization Study
Summary
Populus tremula* Populus tremuloides wood samples were subjected to three-stage pulping in formic
acid media with hydrogen peroxide addition, according to the Milox process. By means of three incomplete,
second-order, centered, factorial designs, the effects of selected operational variables on the composition
and technical properties of pulps were assessed for optimization purposes. Under the best conditions
assayed, a pulp with 2.30% lignin, 87.0 % cellulose and 3.25% xylan was obtained at 53.2%
pulp yield. Good SCAN viscosity (826 ml/g), reduced Kappa number (9.0) and satisfactory alkaline
resistance (R-10 = 89.0; R-18 = 91.0) proved the potentiality of the selected pulp for dissolving pulp
production.
Holzforschung, Walter de Gruyter
Print ISSN: 0018-3830
Volume: 54, 09/2000
Pages: 544 - 552
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