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 These works are licensed under a Creative Commons Attribution 4.0 International License. F.Kh. Khakimova, K.A. Sinyaev, T.N. Kovtun Complete text of the article:Download article (pdf, 0.6MB )UDС676.164.3.023.1DOI:AbstractECF bleaching of sulphate softwood pulp is investigated using the following bleaching sequence: Pa-E-Chl1-Ep-Chl2-A where Pa is peroxide delignification in acidic medium, E – alkaline extraction, Chl – bleaching by sodium chlorite, Ep – alkaline extraction with addition of peroxide, A - acidification. Regression equations are worked out and conditions of Pa and Chl1 stages are optimized. Comparative characteristics of bleached and non-bleached pulp according to the above sequence are provided.Authors
AffiliationPerm National Research Polytechnic UniversityKeywordssulphate softwood pulp, ECF bleaching, peroxide delignification, pulp bleaching by sodium chlorite, experiment, box plan, Statgraphics Plus Version 5.0, regression equations, optimization, bleached pulp, quality indexes.ECF Bleaching оf Sulphate Softwood Pulp by Hydrogen Peroxide аnd Sodium Chlorite |
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