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Comparative Investigation on the properties of Soda and Soda-Ethanol pulps from three hardwoods

Taḥqīqāt-i ʻulūm-i chūb va kāghaz-i Īrān, 2015-09, Vol.30 (3), p.399-407 [Peer Reviewed Journal]

ISSN: 1735-0913 ;EISSN: 2383-112X ;DOI: 10.22092/ijwpr.2015.12993

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  • Title:
    Comparative Investigation on the properties of Soda and Soda-Ethanol pulps from three hardwoods
  • Author: Hosein Valayi ; Ahmad Jahan Latibari
  • Subjects: delignification ; kappa number ; SODA ; soda-ethanol ; yield
  • Is Part Of: Taḥqīqāt-i ʻulūm-i chūb va kāghaz-i Īrān, 2015-09, Vol.30 (3), p.399-407
  • Description: Strength properties and the yield of soda and soda-ethanol pulps produced using hornbeam, beech and poplar woods were investigated. Soda pulps were produced applying 20% active alkali and the soda-ethanol pulps were made using 10% active alkali and 50% ethanol. The pulping temperature was constant at 175 C and the soda pulping time was selected at 120 minutes and the soda-ethanol pulping times were 120 and 180 minutes. The highest accepted pulping yield at 58.54% was reached using soda pulping on poplar wood and the lowest yield (49.29%) was related to soda-ethanol pulp produced from beech wood applying 180 minutes pulping time. The accepted yield of soda-ethanol pulping was low, but the kappa numbers of these pulps were almost 20 units lower than soda pulps. The strength properties of soda-ethanol pulps were superior to soda pulps and the difference was statistically significant at 99% confidence level. The results of this study indicated that the delignification of soda-ethanol pulping process is faster than soda pulping from the selected hardwoods especially poplar wood.
  • Publisher: Regional Information Center for Science and Technology (RICeST)
  • Language: Persian
  • Identifier: ISSN: 1735-0913
    EISSN: 2383-112X
    DOI: 10.22092/ijwpr.2015.12993
  • Source: Alma/SFX Local Collection
    DOAJ Directory of Open Access Journals
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