Improving CMP Pulping Process of Eucalyptus by Using of Surfactants

Document Type : Research Note


1 Department of Wood and Paper Science and Technology, Faculty of Natural resources, University of Tehran, P.O. Box 31585-4314 Karaj, I.R. IRAN

2 Wood and Paper Science Research Division, Research Institute of Forests and Rangelands, Tehran, I.R. IRAN


In this research the effect of three non-ionic surfactants named PEG-1000, KELA-2 and KECA-20 at four levels of 1, 2, 3 and 4 % on CMP pulping of Eucalyptus Camaldulensis, oxidative bleaching of selected pulps and strength of handsheet papers were investigated.The resulting pulps with higher screen yield and lower reject from application of each surfactant as well as the reference CMP pulps (without surfactant) were selected and bleached in two stages with H2O2. The pulping results showed that application of KECA-20 at the level of 1% increased accepted yield by about 2.5%. KECA-20 (1%) and PEG-1000 (4%) at the level of 1% lowered the consumption of bleaching agents and increased brightness and decreased opacity and yellowness of pulp. In addition, application of surfactants increased strength of handsheet papers compared to the paper obtained from the reference CMP pulp.


Main Subjects

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