Mixed pulping of kenaf and wood by kraft process/ Chien Chu, Naiyana Niyomwan, Anchalee Puangvichit
โดย: Chu, Chien
ผู้แต่งร่วม: Niyomwan, Naiyana | Puangvichit, Anchalee
Language: English ชื่อชุด: Class. Invest. no.2ข้อมูลการพิมพ์: Bangkok : Thailand Institute of Scientific and Technological Research, 1972 หัวเรื่อง: Kenaf | Kraft process | Pulps | Wood-pulpสารสนเทศออนไลน์: Click here to access full-text สาระสังเขป: Bleached chemical pulps were prepared by kraft pulping process with mixed kenaf and other raw materials. In kraft pulping with mixed kenaf chips and waste young teak chips in 1: 1 ratio, pulp yield of 47% was obtained with 19.1% Na2O and 18.8% sulphidity at 170 degree celsius for 2 hours. The pulp was bleached to 74% brightness with 8% chlorine in C/E/H bleaching sequence with a bleached yield of 42%. The pulp initial freeness was S-R 890 ml. The physical properties at 425 ml S-R freeness after 7 minutes beating were : bulk 1.31 ml/g, breaking length 6690 m, tear factor 129, burst factor 47, and folds 516.สาระสังเขป: Bleached pulps from mixed pulping of kenaf and wood appar better in formation and opacity with more initial freeness than kenaf pulp alone. - Authors.สาระสังเขป: Mixed pulping of Thai kenaf chips with 50% coniferous wood (Pinus khasya) chips by kraft process with 20% Na2O and 20% sulphidity at 170 degree celsisu for 2 hours gave 43% yield on chips. The [ulp was bleached to 83% brightness with 8% chlorine in C/E/H sequence with 90.5% blenched yield based on pulp. The initial freeness of pulp was S-R 880 ml. The pulp with final freeness of S-R 410 ml after 6 minutes beating gave a quality with breaking length 5094 m, tear factor 153, burst factor 31, folds 240, and bulk 1.52 ml/f.สาระสังเขป: Mixed pulping of Thai kenaf chips with harwood (Casuaring equisetifolia) Chips with a ratio 1: 1 by kraft process under the same cooking and bleaching conditions as the above gave 43% bleached yield with initial freeness at S-R 900 ml and good pulp quality at S-R 460 ml freeness, featuring breaking length 5915 m, tear factor 128, burst factor 39, folds 248, bulk 1.52 ml/g, and brightness 85%.
| ชนิดของทรัพยากร | Location | Call number | สถานะ | Last seen | Copy No. | บาร์โค้ด |
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วว. เทคโนธานี | Available | 2018-08-31 | 1 | RP1972/273 | |
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วว. เทคโนธานี | Available | 2018-08-31 | 2 | RP1972/273-2 |
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