China National Pulp and Paper Research Institute

Beijing, China

China National Pulp and Paper Research Institute

Beijing, China
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Duan C.,China National Pulp and Paper Research Institute | Feng W.-Y.,China National Pulp and Paper Research Institute | Zhang Y.-L.,Karpo Technology Consulting Ltd Company
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2013

Woody biomass is an important alternative source for producing chemicals, synthetic materials and renewable energy and so on besides the utilization in pulp and paper industry, while these potentials are undesirably hindered by the complex structure of the biomass. As the most significant step in biomass conversion process, pretreatment technology has become a focus all around the world. The research progress in pretreatment technologies including physical methods, chemical methods, physical-chemistry methods and biologic methods were reviewed in detail, the results of corresponding pretreatment technologies were analyzed. Besides, the future of development of woody biomass pretreatment technologies and the perspective of the technologies integrated with pulp and paper industry were also discussed.


Kuang S.-J.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2013

Ozone bleaching development trend, ozone HC bleaching and MC bleaching processes, operation parameters of ozone bleaching and the advantages of using ozone bleaching are reviewed briefly in this paper. It concluded that ozone ECF-light should be the priority choice for the bleaching process which will copes with the more strict effluent discharge regulation.


Zhang X.-C.,China National Pulp and Paper Research Institute | Liu J.-G.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2012

The concepts of extensional flow and extensional viscosity were introduced in this paper, the relationship between extensional viscosity and shear viscosity and the influence of thickener on extensional viscosity were discussed, also the importance of extensional viscosity in blade coating, MSP coating and curtain coating was discussed respectively. Finally the measurements of the variation trend of extensional viscosity were introduced, the methods of Converging Channel-Flow and Capillary Breakup were emphasized.


Dong F.-X.,China National Pulp and Paper Research Institute | Liu W.,China National Pulp and Paper Research Institute | Liu H.-F.,Shandong Institute of Light Industry
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2012

Nanocellulose has become the frontier and hotspot of cellulose science research for its characteristics of abundance, renewability, biodegradability and excellent mechanical properties. The physical method for preparation of microfibrillated cellulose, the chemical method and biological method for preparation of nanocrystalline cellulose, and the potential application of nanocellulose in the pulp and paper field were reviewed. Moreover, the key points of nanocellulose research in the future were summarized.


Li W.-L.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2011

The energy consumption of paper industry in China and the developed countries was compared simply. The energy saving measurements from the aspects of structure adjustment, energy saving technology and energy saving management were discussed.


Zhang Y.,China National Pulp and Paper Research Institute | Cao C.-Y.,China National Pulp and Paper Research Institute | Feng W.-Y.,China National Pulp and Paper Research Institute | Lin Q.-Y.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2012

This paper mainly introduced the current situation and development of pollution control science and technology in China's paper industry including its research and development, applications and achieved results in recent two years, the differences between China and foreign countries were compared in terms of fiber material structure, pollution control technology research and development, applied equipment and effluent discharge standard. Finally the development trend of China's paper industry pollution control technology was discussed, novel coagulation sedimentation technology, membrane separation technology, advanced oxidation technology, constructed wetland technology and laccase treatment technology in particular. Solutions for pollution control in alkaline pulping process, recycled paper making process and paper making process are put forward.


Lv W.-J.,China National Pulp and Paper Research Institute | Zhang Y.,Zhejiang Sci-Tech University | Chen B.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2012

Raw materials, cooking method, and bleaching process of dissolving pulp manufacture were mainly introduced. The factors influencing the quality of dissolving pulp and development tendency were also discussed.


Du Y.,China National Pulp and Paper Research Institute | Zang Y.-H.,Tianjin University of Science and Technology | Sun J.,Tianjin University of Science and Technology
Progress in Organic Coatings | Year: 2014

The consolidation process of wet paper coating layers has been generally divided into several stages by the definitions of first critical concentration (FCC) and second critical concentration (SCC), however few works have been done on the kinetics of water expelled during drying and its influence on the critical concentrations. In this paper, the effects of three kinds of water soluble polymers, i.e., carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA) and modified coating starch, on the consolidation of model kaolin clay-latex coatings were investigated. On-line water evaporation loss rate, together with the level of FCC and time needed to reach FCC, was characterized. The results showed that water evaporation loss weight increased almost linearly with drying time during the initial wet coating layer consolidation stage. On-line water evaporation rate and the value of FCC decreased with water soluble polymers addition, while the time needed to reach FCC became longer. Among the three polymers studied, CMC was the most effective, then PVA and starch. © 2014 Elsevier B.V.


Miao Q.,Fujian Agriculture and forestry University | Miao Q.,University of New Brunswick | Chen L.,Fujian Agriculture and forestry University | Huang L.,Fujian Agriculture and forestry University | And 4 more authors.
Bioresource Technology | Year: 2014

The commercial pre-hydrolysis kraft-based dissolving pulp production process can be a typical example for the demonstration/implementation of the integrated forest biorefinery concept. In this study, the concept of cellulase treatment of this dissolving pulp for enhancement of accessibility/reactivity in terms of viscose rayon production was demonstrated. The cellulase treatment resulted in the formation of additional openings/surface areas in the fiber structure via the possible action of "etching". As a result, the pore volume of pulp fibers increased, which led to the increase in the accessibility to xanthation, and thus Fock reactivity. Results showed that the cellulase treatment was effective in increasing the Fock reactivity, at a cellulase dosage of 2. u/g (based on the dry weight of pulp), the Fock reactivity increased from 47.67% to 79.9%. The adoption of cellulase treatment to hardwood kraft-based dissolving pulp can provide an efficient approach for enhancing its performance in the commercial viscose-rayon process. © 2013 Elsevier Ltd.


Kuang S.-J.,China National Pulp and Paper Research Institute
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2010

Some energy saving technologies, which have been used or have application potential in pulp and paper industry, were briefly introduced.

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