The pulp producing with monoethanolamine process from barely straw and ECF bleaching of obtained pulp

Document Type : Research Paper

Authors

1 Assoc. Prof., Faculty of Natural Resources, University of Tehran, I.R. Iran

2 M.Sc. Wood and Paper Science, College of Natural Resources, University of Tehran, I.R. Iran

3 Assist. Prof., Wood and Paper Science and Technology, College of Natural Resources, University of Mohaghegh Ardabili, I.R. Iran

Abstract

In recent years, utilization of non-wood lignocellulose resources has been great concern for production of different cellulose products. Therefore, the properties of pulp from barely straw via monoethanolamine (MEA) process were investigated in this study. Pure monoethanolamine was used in different proportions with water and anthraquinone. Variables including proportion of monoethanolamine to water at five levels (100, 75, 50, 37.5, and 25 %) and anthraquinon at two levels (0 and 0.1%) were selected. Soda pulping process was used as a reference cooking sample. According to obtained results, the produced pulp by MEA/water ratio of 25/75 had the highest yield (63.2%) and the lowest kappa number (18.9) was observed in the pulp produced from MEA/water ratio of 75/25.  Burst, tensile and tear indices of the pulp produced from monoethanolamone method were obtained 64.17N.m/g, 6.04 mN.m2/g and 3.17 kpa.m2/g, respectively. In general, pulping process via combined method of monoethanolamine/water makes it possible to obtain a chemical pulp with suitable kappa number (less than 20), efficient yield and proper bleaching ability, using a little amount of monoethanolamine in combination with water.

Keywords

Forest and Wood Products
Volume 70, Issue 4
January 2018
Pages 691-700

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