Results 121 to 130 of about 28,384 (160)

Refining of High-Yield Wood Pulp

Proceedings, annual meeting, Electron Microscopy Society of America, 1973
As the supply of wood for paper and other wood fiber products constantly dwindles, the ensuing economic situation demands that wood pulping procedures be modified to provide higher yields of usable wood substance. Mechanical, semichemical, and strictly chemical methods are presently employed to reduce wood to its fibrous components.
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Brightness Reversion of Mechanical Pulps XI: Photostabilization of High-Yield Pulps by Thiosulfinates

Journal of Wood Chemistry and Technology, 1999
A series of eleven cyclic and acyclic thiosulfinates was synthesized and applied onto hardwood BCTMP (bleached chemithermomechanical pulp) testsheets. Treated and untreated testsheets were photoaged and their optical property were monitored. The results of these photoaging experiments indicated that cyclic thiosulfinates were relatively ineffective at ...
Cang Li, Charles M. Cook, Arthur J. Ragauskas   +2 more
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Improvement of Waste Paper Pulp Properties by Using Aspen High-Yield Pulp

Advanced Materials Research, 2013
Because of the public environmental awareness growing and Fibrous raw material shortage, waste paper recycling has received widespread attention, increased year by year. Waste paper fiber through the whole process of pulping and papermaking, different production processes and the use of environment, waste paper fiber can occur in many different changes
Jie Ren, Chuan Shan Zhao
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Photo-Induced Yellowing of High Yield Pulps

hfsg, 1995
Results of the investigation of high yield pulp photoyellowing were compared with those of the photolysis of lignin model compounds in solution. It was shown that oxygen is the most important species transferring reaction energy and free valency from photoexcited parts of lignin to those sites of pulp where reactions proceed.
K. Fischer, M. Beyer, H. Koch
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Optimization and fundamentals of high-yield pulping with ethanol

Wood Science and Technology, 1995
A new high-yield pulping process based on ethanol pretreatment and steam cooking was studied. The effect of processing conditions (cooking temperature at six levels and ethanol concentration at five levels) was determined. Optimum results appeared at 30% ethanol concentration and with cooking at 195 °C.
Jan Bendzala, BohuslavV. Kokta
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Enhancing yield through high-kappa pulping

TAPPI Journal, 2014
Chemical pulping consists of a collection of delignification reactions designed to remove amorphous lignin from the fiber matrix while preserving carbohydrates in a fibrous form. Commercially available cooking processes are relatively nonselective with reagents attaching both lignin and carbohydrates. Generally, the carbohydrates react more slowly than
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The method of increasing of pulp yield with kraft cooking

Digest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference (IEEE Cat. No.03CH37472), 2004
The increasing of pulp yield in cooking process is very important for pulp-paper industry. The modified kraft cooking, such as polisulfide process, is one of the directions in increasing of pulp yield. We have developed and patented in Russia the method and the devise for its realization. This method is founded on influence of electric spark discharge,
R. Belodubrovsky, T. Mironova, V. Ermolinsky, I. Zhukova, G. Shneerson, S. Krivosheev, A. Nenashev, Yu. Adamian, V. Vasilevsky, I. Jossel, V. Burtzev   +10 more
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Pulping Bagasse with Alcholic Nitric Acid Pulp Yields and Characteristics

Industrial & Engineering Chemistry, 1938
S. I. Aronovsky, D. F. J. Lynch
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Factors Affecting Kraft Pulp Yield

Kraft method, as a chemical pulping method, is commonly used in the worldwide. Pulps producing by using this method have a lower pulp yield compared to semi-chemical and mechanical pulping methods. However, strength properties of kraft pulp are higher than those of pulps producing from other pulping methods.
Gülsoy, Sezgin Koray, Gülsoy, Sezgin Koray   +1 more
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Factors Affecting Kraft Pulp Yield

2014
Kraft yöntemi Dünya’da en yaygın üretimi yapılan kimyasal kağıt hamuru üretim yöntemidir. Bu yöntem kullanılarak kağıt hamuru üretildiğinde yarı kimyasal ve mekanik yöntemlere nazaran daha düşük bir hamur verimi elde edilir. Buna karşın, kraft yöntemi ile elde edilen hamurların direnç özellikleri yarı kimyasal ve mekanik yöntemlerle elde edilenlere ...
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