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A comparison of soda and soda-AQ pulps from cotton stalks
Mehmet Akgül* and Ayhan Tozluoğlu
Duzce
University, Faculty of Forestry, Konuralp Campus, 81620
Düzce, Turkey.
*Corresponding author.
E-mail: mehmetakgul@duzce.edu.tr. Tel:
0380 542 1137, 0532 522 4459. Fax: 0380 542 1136.
Accepted 14 July, 2009 |
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In this
study, cotton stalks (Gossypium hirsutum L.) were
cooked using soda and soda-anthraquinone (AQ) process. Nine
soda cooks were conducted by changing cooking conditions
including active alkali charge and pulping time. Soda-AQ
cooks were obtained by adding 0.075, 0.10, 0.15, 0.2% AQ
(based on o.d stalks) to optimum soda pulping. Adding AQ to
soda pulps led to the increase in regarding to pulp yield
and kappa numbers. On the other hand, soda-AQ pulps made
from cotton stalks showed higher mechanical properties than
soda pulps. The results indicated a major increase in pulp
brightness when soda pulping was modified with %0.15 AQ.
Also, the results showed that better pulp and paper can be
produced from cotton stalks by soda-AQ process compared to
the soda process.
Key
words:
Alkaline pulping, anthraquinone, cotton stalks,
delignification, mechanical properties, yield. |
