The effect of hot water and alkaline pre-extractions on properties of bagasse pulps produced by monoethanolamine-AQ process

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MORADIAN GILAN K.; HEDJAZI S.; ABDOLKHANI A.; Sixta H.

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Journal Paper

Paper Information

Journal: Iranian Journal of Wood and Paper Science Research Year:2019 | Volume:34 | Issue:3 (68) Page(s): 409-423

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Title

The effect of hot water and alkaline pre-extractions on properties of bagasse pulps produced by monoethanolamine-AQ process

Author(s)

MORADIAN GILAN K. | HEDJAZI S. | ABDOLKHANI A. | Sixta H. | Issue Writer Certificate

Keywords

Pre-extractionsQ2

hot waterQ1

alkalineQ1

bagasseQ2

monoethanolamine pulpingQ1

Abstract

In this research, the effect of hot water and alkaline Pre-extractions on properties of bagasse monoethanolamine-AQ pulps was investigated and the results were compared with that of soda pulping. The pre-extraction with alkaline charge of 10%, time of 30 min. resulted in total yield and holocellulose of 94. 7% and 71. 6%, respectively. The hot water pre-extraction with L/W of 10/1 and time of 45min. led to total yield and hollocellulose of 94% and 69. 4%, respectively. These trails were selected as the optimum conditions. Monoethanolamine was used as pure and also in different proportions with water for cooking unextracted and pre-extracted bagasse. Variables in monoethanoleamine pulpng were the ratio of monoethanolamine to water at three levels (100/0, 75/25, and 50/50%) and the ratio of the liquor to bagasse of 6 to 1, cooking time of 60 min, the temperature of 165° C and AQ charge of 0. 1% were considered as constant. According to the results, the MEA-AQ pulps produced with MEA/H2O ratio of 75/25 (from unextracted bagasse) have the highest total yield (61. 9 %) and the acceptable kappa number (19. 5). Preextraction resulted in improving the yield in both MEA-AQ and soda pulping processes. After pre-extraction, the tensile index and breaking length of pulps dropped. In contrast, the tear index of pulps produced from pre-extracted bagasse in both pulping processes was increased. The brightness of soda pulps from un-extracted and pre-extracted bagasse was more than that of MEAAQ pulps. After pre-extraction, the opacity of pulps remains almost unchanged.

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APA: Copy

MORADIAN GILAN, K., HEDJAZI, S., ABDOLKHANI, A., & Sixta, H.. (2019). The effect of hot water and alkaline pre-extractions on properties of bagasse pulps produced by monoethanolamine-AQ process. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 34(3 (68) ), 409-423. SID. https://sid.ir/paper/401211/en

Vancouver: Copy

MORADIAN GILAN K., HEDJAZI S., ABDOLKHANI A., Sixta H.. The effect of hot water and alkaline pre-extractions on properties of bagasse pulps produced by monoethanolamine-AQ process. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2019;34(3 (68) ):409-423. Available from: https://sid.ir/paper/401211/en

IEEE: Copy

K. MORADIAN GILAN, S. HEDJAZI, A. ABDOLKHANI, and H. Sixta, “The effect of hot water and alkaline pre-extractions on properties of bagasse pulps produced by monoethanolamine-AQ process,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 34, no. 3 (68) , pp. 409–423, 2019, [Online]. Available: https://sid.ir/paper/401211/en

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