Comparative Study of Pulp Characteristics from Maple (Acer velutinum) wood produced by Soda and Monoethanolamine Process with Anthraquinone

One of the considerable procedure to supply the lignocellulose material for the industries is the expansion of agroforestry in appropriate points of Iran. Due to ecological adaptability and fast growth of Maple among the existing native species at the northern forests of the country, it could be considered as a reasonable species in agroforestry. The purpose of this study was to investigate the characteristics of pulp made from Maple using monoethanol amine, monoethanol amine/ anthraquinone, soda, and soda/ anthraquinone processes and evaluation of their properties. The treatments were used in three levels of Monoethanol amine concentration (50, 75 and 100 wt%) in monoethanol amine pulping, alkalinity (22, 24 and 26 wt%) in soda pulping, and time (180,240 and 300 min) under the constant temperature at 165 ˚C. The anthraquinone was added to the monoethanol amine and soda process as a chemical additive in two levels of concentration (0, 0.1wt%).The optimal cooking of monoethanolamine/anthraquinone, soda/anthraquinone, and soda processes lead up to 67.93, 50.97and 52.36 % of total yield, and 27.7, 19.1 and 29.23 of Kappa number respectively. The results showed that the highest amount of tensile index (61.36 Nm/g), Burst index (3.341 kPam2/g), tear index (6.382 mN.m2/g) and brightness (20.81 %) belonged to soda, monoethanol amine/anthraquinone, and soda pulps respectively. According to the results of this study, the soda process had significant effects on the Maple samples in comparison with the monoethanol amine process. Due to high energy consumption and more time for delignification, the Monoethanol amine process is not applicable to wooden resources.