Effect of pre- extraction liquid reuse on and soda-AQ pulp properties made up of wheat straw

Document Type : Research Paper

Authors

Abstract

In this study, the effect of recycle liquor resulted from alkaline pre- extraction step and its
reuse on next pre- extraction step was investigated to produce soda-AQ pulp from wheat
straw. This pre-extraction was done at a temperature of 140°c and 90 minute to get its weight
decrease about 8-10 percent. Under alkaline pre-extraction, liquor of this step was used as pre
extracted liquor of wheat straw in next step (first recycle liquor step), and liquor from first
recycle liquor step was used as pre-extracted liquor of wheat straw in next step (second
recycle liquor step). According to produced pulp from alkaline pre-extracted straw and
recycled liquor compared with un pre-extracted one and in order to gain kappa number 12,
results have shown that total yield based on primary weight of straw particles in pre-extracted
cook was equal to un pre- extracted straw. The pre-extracted soda-AQ pulp had weaker
reactions to refine than un the pre-extracted control pulp. Pre-extracted Straw pulp had equal
tearing strength, and lower bursting and tensile strengths than the control pulp.

Keywords

References

[1] Retsina, Theodora and Pylkkanen Vesa. 2007. AVAPTM, A Novel Biorefinery Concept.
Tappi Web Exclusives 1-4.
[2] Yoon, S-H. and van Heiningen, A., 2008. Kraft pulping and papermaking properties of
hot-water pre-extracted loblolly pine in an integrated forest products biorefinery. TAPPI
JOURNAL, 7(7): 22-26.
[3] Goel, Ankur. and Ramaswamy Shri, . 2006. Coparison of Refining Response of Soda AQ
and Organosolv Wheat Straw Pulps with Traditional Wood Pulps. Tappi Journal. 1 to 1.
[4] Testova, L. 2006. Hemicelluloses Extraction from Birch Wood Prior to Kraft Cooking:
Extraction Optimisation and Pulp Properties Investigation. MSc Thesis, Department of
Chemical Engineering and Geosciences, Division of Chemical Thechnology, Lulea
University of Technology, Sweden.
[5] Mao, H., Genco, J.M., van Heiningen, A. Zou, H., Luo, J., and Pendse, H.,
2008.Technical economic evaluation of a hardwood biorefinery using the “near-neutral”
hemicellulose pre-extraction process. In TAPPI Engineering, Pulping, & Environmental
Conference, August 24–27, Portland, Oregon, 165p.
[6] Lei, Yichao and et al. 2006. Effect of Hot-Water Extraction on Alkaline Pulping of
Bagasse.presentation.1-35.
[7] Yoon, S-H., Macewan, K., and van Heiningen, A. 2008. Hot-water pre-extraction from
loblolly pine (Pinus taeda) in an integrated forest products biorefinery. TAPPI JOURNAL,
7(6): 27–32.
[8] Al-Dajani, W.W., and Tschirner, U.W. 2008. Pre-extraction of hemicelluloses and
subsequent kraft pulping. Part I: alkaline extraction. TAPPI JOURNAL, 7(6): 3–8.
[9] Biermann, Christopher.,J.1996. Handbook of pulping and papermaking.
[10] Yoon, S-H., Cullinan, H., and Krishnagopalan, G. A. 2009. The Effect of Modified
Alkaline Pulping of Southern Pine, Integrated with Hemicellulose Pre-extraction on Pulp
Properties. In TAPPI Engineering, Pulping, & Environmental Conference, October 11–14,
Memphis, Tennessee, 146 p.

Files

Share

How to cite

Statistics