THE EFFECTS OF HOT WATER PRE-EXTRACTION AND ALKALINE CATALYZED ON SODA-AQ PULPING OF KENAF WHOLE STEM

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ASADOLLAHZADE M.T.; RESALATI H.; GHASEMIAN A.

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Journal: Iranian Journal of Wood and Paper Science Research Year:2011 | Volume:26 | Issue:3 (36) Page(s): 437-453

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Title

THE EFFECTS OF HOT WATER PRE-EXTRACTION AND ALKALINE CATALYZED ON SODA-AQ PULPING OF KENAF WHOLE STEM

Author(s)

ASADOLLAHZADE M.T. | RESALATI H. | GHASEMIAN A. | Issue Writer Certificate

Keywords

KENAFQ2

PRE-EXTRACTIONQ2

SODA-AQQ2

YIELDQ2

KAPPA NUMBERQ2

Abstract

In the present study the effects of hot water PRE-EXTRACTION and alkaline catalyzed were evaluated on SODA-AQ pulping of KENAF whole stem. In this respect, following KENAF chips preextraction at various temperature and time conditions, pulp preparation were carried out on oven-dried weight loss levels of 8.5, 11.5 and 14.5 % of the samples, and the reference untreated KENAF chips performed by using SODA-AQ at 3 levels of H-factors (983, 1408 and 1832 hours). Results indicated that KENAF chips weight losses increased while the pre-extracted pH decreased as PRE-EXTRACTION temperature and time increased. The required H-factor for achieving certain level of weight loss was reduced by adding small amounts of alkali (0.15 % on oven dried KENAF) on hot water extraction stage. The Pulp YIELDs were reduced by increasing cooking H-factor and extracted weight loss. Averages comparison indicated that significant differences were observed, at 95% confidence, between the pulp YIELD and KAPPA NUMBER from reference pulp and pre-extracted pulp samples at levels of about 8.5, 11.5 and 14.5 %, and pulp YIELDs and their KAPPA NUMBER were higher in reference pulps than pre-extracted samples. In addition, pulp YIELD average was higher in pre-extracted samples by alkaline catalyzed than preextracted samples by hot water, however, no significant differences were observed between their KAPPA NUMBER average. Meanwhile, to obtain a certain (similar) KAPPA NUMBER, preextracted KENAF chips in comparison with reference untreated KENAF chips require lower Hfactor.

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APA: Copy

ASADOLLAHZADE, M.T., RESALATI, H., & GHASEMIAN, A.. (2011). THE EFFECTS OF HOT WATER PRE-EXTRACTION AND ALKALINE CATALYZED ON SODA-AQ PULPING OF KENAF WHOLE STEM. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, 26(3 (36)), 437-453. SID. https://sid.ir/paper/109393/en

Vancouver: Copy

ASADOLLAHZADE M.T., RESALATI H., GHASEMIAN A.. THE EFFECTS OF HOT WATER PRE-EXTRACTION AND ALKALINE CATALYZED ON SODA-AQ PULPING OF KENAF WHOLE STEM. IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH[Internet]. 2011;26(3 (36)):437-453. Available from: https://sid.ir/paper/109393/en

IEEE: Copy

M.T. ASADOLLAHZADE, H. RESALATI, and A. GHASEMIAN, “THE EFFECTS OF HOT WATER PRE-EXTRACTION AND ALKALINE CATALYZED ON SODA-AQ PULPING OF KENAF WHOLE STEM,” IRANIAN JOURNAL OF WOOD AND PAPER SCIENCE RESEARCH, vol. 26, no. 3 (36), pp. 437–453, 2011, [Online]. Available: https://sid.ir/paper/109393/en

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