亜硫酸パルプ廃液濃縮焙焼に関する研究 (第13報)
書誌事項
- タイトル別名
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- Studies on the Evaporation and Combustion of Calcium-Base Sulfite Waste Liquor (XIII)
- Preparation of Unbleached Pulp from Hardwood Sulfite Knotter-Rejects
- スメルト硫化ソーダを用いる広葉樹材SPノット粕のクラフト蒸解
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説明
The preparation of pulp from hardwood (beech) sulfite knotter-rejects by kraft digestion has been studied. The rejects used in this study were the materials separated, respectively, from paper-making pulp (PSP) and dissolvingpulp (DSP) at a sulfite pulp mill. Their analytical characteristics were as follows : lignin (I) 12.0 and 19.3% (given in order of the rejects named), pentosans (II) 6.5 and 2.1% holocellulose (III) 81.0 and 65.7%, and alpha-cellulose (IV) 72.6 and 63.8%. The IV : III ratios in the two kinds of rejects were greater than the ratios both in the original woodchips and in softwood sulfite knotter-rejects. The digestion of the rejects from the PSP was carried out under the following conditions : total alkali 17-26%, sulfidity 20-50%, max. cooking temperature ca. 160°C, and cooking time at max. temperature 2hrs. Under such conditions, pulps were produced in yields from 49.0 to 55.9% (screened); and their properties were as follows : I 1.8-2.5%, II 1.8-2.2%, III 91.4-94.4%, IV : ratio 0.957-0.977, and relative viscosity 4.6-6.1. The rejects from the DSP were cooked under the following conditions : total alkali 17 or 20%, sulfidity ca. 30%, max. cooking temperature 150-170°C, and cooking time at max. temperature 0.5-2.0hrs. Under such conditions, pulps were produced in yields from 41.5 to 43.6% (screened); and their properties were as follows : I 1.8-2.2%, II 1.4-1.6%, IV 90.0-93.0%, IV : III ratio 0.951-0.974, and relative viscosity 3.7-5.2.
収録刊行物
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- 紙パ技協誌
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紙パ技協誌 19 (6), 289-294, 1965
紙パルプ技術協会
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詳細情報 詳細情報について
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- CRID
- 1390001206514418688
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- NII論文ID
- 130003685418
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- ISSN
- 18811000
- 0022815X
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可