Delnavaz, V., Jahan latibari, A., Mirshokraei, A., Sepide dam, S. (2012). Investigation on the properties of totally chlorine free bleached soda - oxygen pulp from old corrugated container. , 27(2), 256-266. doi: 10.22092/ijwpr.2012.117065
Vahid Delnavaz; Ahmad Jahan latibari; Ahmad Mirshokraei; Sead Javad Sepide dam. "Investigation on the properties of totally chlorine free bleached soda - oxygen pulp from old corrugated container". , 27, 2, 2012, 256-266. doi: 10.22092/ijwpr.2012.117065
Delnavaz, V., Jahan latibari, A., Mirshokraei, A., Sepide dam, S. (2012). 'Investigation on the properties of totally chlorine free bleached soda - oxygen pulp from old corrugated container', , 27(2), pp. 256-266. doi: 10.22092/ijwpr.2012.117065
Delnavaz, V., Jahan latibari, A., Mirshokraei, A., Sepide dam, S. Investigation on the properties of totally chlorine free bleached soda - oxygen pulp from old corrugated container. , 2012; 27(2): 256-266. doi: 10.22092/ijwpr.2012.117065

Investigation on the properties of totally chlorine free bleached soda - oxygen pulp from old corrugated container

تحقیقات علوم چوب و کاغذ ایران
Article 6, Volume 27, Issue 2 - Serial Number 39, June 2012, Pages 256-266    PDF (233.38 K)
Document Type: Research Paper
DOI: 10.22092/ijwpr.2012.117065
Authors
Vahid Delnavaz1; Ahmad Jahan latibari* 2; Ahmad Mirshokraei3; Sead Javad Sepide dam4
1Department of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj
2Associated Professor of Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj
3Prof., Payame Noor University, Tehran, I.R. Iran.
4Assistant Professor, Wood and Paper Science and Technology, Karaj Branch, Islamic Azad University, Karaj, Iran.
Abstract
Soda - oxygen pulping of old corrugated container to produce totally chlorine free bleached pulp was investigated. In order to reach the optimum delignification condition; four levels of sodium hydroxide (9, 11, 13, and 15 %), three cooking times (90, 120, and 150 minutes) and two cooking temperatures (120, and 150 ºC) at 6 bar oxygen pressure were studied. Yield and kappa number of pulps were measured. Results showed that the pulp obtained applying 9% sodium hydroxide, 150 minute delignification time and 150 ºC delignification temperature which produced the pulp with the yield and kappa number of 72.44% and 24.72 respectively was suitable for further bleaching. Strength of selected pulp including burst strength, tensile strength, and tear strength indices were measured as 2.27 kPa.m2/g, 29.19 Nm/g and 10.24 mN.m2/g respectively. The pulp was bleached applying 3% H2O2 and 2% NaOH to reach the final brightness of 57.97% ISO.
Keywords
Soda/oxygen; old corrugated container (OCC); delignification; totally chlorine free; ftrength properties
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