Results 261 to 270 of about 35,996 (301)
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The apparent yield stress of pulp fiber suspensions
Journal of Rheology, 2010The apparent yield stress is one of the most important rheological properties of pulp suspensions in designing process equipment for the pulp and paper industry. Therefore, determining a reliable apparent yield stress measurement technique is of importance, not only for pulp suspensions but for any fluid exhibiting yielding behavior.
Savvas G Hatzikiriakos +2 more
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Production of high yield bleached hardwood kraft pulp: Breaking the kraft pulp yield barrier
TAPPI Journal, 2011A modified kraft pulping process has been developed that successfully breaks the traditional hardwood kraft pulp yield barrier. The process produces fully bleached, high brightness hardwood kraft pulp with a yield of greater than 53% on wood. Details of the development and processing steps, along with various recovery cycle impacts, are discussed.
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Evaluation of current methods to estimate pulp yield of hemp
Industrial Crops and Products, 1994Abstract Large-scale evaluation of hemp stems from field trials requires a rapid method for the characterization of stem quality. The large differences between bark and woody core in anatomical and chemical properties, make a quantification of these two fractions of primary importance for quality assessment. This paper evaluates accuracy and power of
de Meijer, E.P.M., van der Werf, H.M.G.
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Effects of Pulped Soybean Silage on the Milk-yield of Cows
Nature, 1961As a result of co-operative investigations carried out with the Research Institute for Animal Physiology, a report has already been published1 on the summer feeding of green soybeans, in which it was shown that the relative protein-deficiency in green maize silage having a high dry-matter yield may be compensated by the flowering, pod-forming soybean ...
E, KURNIK, D, GABOS, B, POZSAR
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Brightening of mechanical and high-yield pulps
TAPPI Journal, 2013This work lays out the general principles of the brightening of mechanical pulp. The author presents a practical discussion of the brightening processes for both reductive (sodium hydrosulfite or dithionite) and oxidative (hydrogen peroxide) chemicals. Each of these chemicals has its advantages, disadvantages, and most suitable applications.
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Improvement of Waste Paper Pulp Properties by Using Aspen High-Yield Pulp
Advanced Materials Research, 2013Because 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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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 +2 more
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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 +2 more
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Refining of High-Yield Wood Pulp
Proceedings, annual meeting, Electron Microscopy Society of America, 1973As 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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Photo-Induced Yellowing of High Yield Pulps
hfsg, 1995Results 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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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), 2004The 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 +10 more
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