Modification of Egyptian Bagasse Kraft Pulping Using Yield - increasing Additives Ι-Effect on Chemical Properties | ||
| Egyptian Journal of Chemistry | ||
| Article 8, Volume 57, Issue 5, December 2014, Pages 447-462 PDF (634.19 K) | ||
| DOI: 10.21608/ejchem.2014.1063 | ||
| Abstract | ||
| BAGASSE is one of the potential raw materials for pulp in Egypt. So, our target is to improve the chemical properties of Kraft pulp using yield- increasing additives as anthraquinone (AQ), polysulfide (PS) and sodium borohydride (NaBH4). The effect of the bagasse to liquor ratio B/L ratio was also examined. The yield gains for AQ, PS, NaBH4, AQ-PS and AQ-NaBH4 were 4.73%, 6.46%, 2.99%, 12.15% and 4.05%, respectively for 1:4 B/L ratio. While the yield gains at 1:10 B/L ratio were 1.42%, 2.65%, 5.2%, 6.9% and 5.3%, respectively. Combination of AQ-PS gave synergistic effect. AQ, NaBH4 and AQ-NaBH4 reduced the kappa number by 7%, 14%, 9%, 4.48%, 40.3% and 5.95% for 1:4 and 1:10 B/L ratios, respectively. More dissolution of lignin was promoted at higher B/L ratio. All additives preserved the carbohydrate yield more than the Kraft one, and showed higher delignification selectivity except for PS. | ||
| Keywords | ||
| Egyptian bagasse; Kraft pulp; Modified kraft pulp; AQ; NaBH4; PS and Yield-increasing additives | ||
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