A comparison of kraft and kraft-sodium borohydrate brutia pine pulps
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Dosyalar
Tarih
2007
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Pergamon-Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Although the reaction of borohydrate with lignin is well-known, limited literature is available regarding the effect of borohydrate on kraft pulp yield and pulp and fiber properties. Therefore, the objective of this study was to study the effects of borohydrate on kraft pulps for Burita pine. First, the optimal cooking conditions for kraft method were determined by varying the active alkali (16% and 18%) and cooking time (60, 90, and 120min). Then, kraft-sodium borohydrate cooks were done at optimal kraft condition by adding sodium borohydrate to the cooking liquor at the amount of 1%, 2%, and 3% (o.d. wood). The results indicated that adding sodium borohydrate in kraft cook not only increases the pulp yield but also significantly decreases the amount of rejects leading to improved selectivity of the lignin removal and delignification rate. Also, kraft-sodium-borohydrate pulps gave higher pulp viscosity and brightness; however, the strength properties were little lower compared to the kraft method. (c) 2006 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
Alkaline Pulping, Delignification, Kappa Number, Kraft Pulping, Mechanical properties, Pine, Sodium Borohydrate, Yield
Kaynak
Building And Environment
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
42
Sayı
7
