Reed Soda Pulping Modified by Green Liquor Pretreatment

Abstract:

The soda pulping modified by green liquor pretreatment was adopted to explore optimal green liquor pretreatment conditions. Results shows that optimum pretreatment conditions are as follows: max temperature, 130°C; holding time, 90min; wood to liquor ratio, 1:4; and green liquor charge, 0.9L/kg. Pretreated reed was pulped under following conditions: heating-up time, 60min; maximum temperature, 160°C; holding time, 60min; NaOH charge, 20% (pretreatment alkali included). Results shows that this process produces pulp with screened yield of 49.05%, Kappa number of 14.6, and viscosity of 1274mL/g. Compared with the results of industrial simulation pulping (21% NaOH), screened yield increases by 2.14%, Kappa number decreases by 5.6 and viscosity rises by 556 mL/g. Therefore, green liquor pretreatment before soda pulping improves pulp performance and yield. Meanwhile the pretreatment utilizes material effectively, thus has practical significance to decrease alkaline consumption and pulping cost.

• Periodical: Advanced Materials Research (Volumes 781-784)
• Pages: 2628-2631
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.781-784.2628
• Online since: September 2013
• Authors: Yi Jia Sun, Hai Ming Li, Jing Hui Zhou, Guang Wei Sun, Zhang Hong Xie
• Keywords: Green Liquor, Modified Soda Pulping, Pretreatment, Reed

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