Results 21 to 30 of about 91,381 (225)

ECF BLEACHING WITH A FINAL HYDROGEN PEROXIDE STAGE: IMPACT ON THE CHEMICAL COMPOSITION OF Eucalyptus globulus KRAFT PULPS

BioResources, 2010
Two industrial elemental chlorine free (ECF) bleaching sequences, D0(EOP)D1(EP)D2 and OQ(PO)DP, are compared with respect to the bulk content of lignin, carboxyl, hexeneuronic acids (HexA), and reducing groups after each bleaching stage.
Pedro E. G. Loureiro, Eva F. Domingues, Dmitry V. Evtuguin, M. Graça Videira Sousa Carvalho   +3 more
doaj   +1 more source

Loss of Coral Trait Diversity and Impacts on Reef Fish Assemblages on Recovering Reefs. [PDF]

Ecol Evol
Analyzing 12 years of field survey data, our study uncovers asynchronous changes in species richness and trait diversity during the recovery of reef‐building coral communities on southern Hainan Island. The decrease in corymbose branching corals and the rise in functionally redundant corals explain the loss of trait diversity during coral recovery ...
Huang L, McWilliam M, Liu C, Yu X, Jiang L, Zhang C, Luo Y, Yang J, Yuan X, Lian J, Huang H.   +10 more
europepmc   +2 more sources

Structural Modifications of Residual Lignins from Sisal and Flax Pulps during Soda-AQ Pulping and TCF/ECF Bleaching [PDF]

, 2013
We have studied the structural modifications of lignins from sisal and flax during their soda-anthraquinone (AQ) pulping and subsequent totally chlorine-free (TCF) and elementary chlorine-free (ECF) bleaching.
J. Rencoret, G. Marques, A. Gutiérrez, J. Jiménez‐Barbero, Angel T. Martı́nez, J. Río   +5 more
semanticscholar   +2 more sources

Lipophilic extractives from several nonwoody lignocellulosic crops (flax, hemp, sisal, abaca) and their fate during alkaline pulping and TCF/ECF bleaching.

Bioresource Technology, 2010
The fate of lipophilic extractives from several nonwoody species (flax, hemp, sisal and abaca) used for the manufacturing of cellulose pulps, was studied during soda/anthraquinone (AQ) pulping and totally chorine free (TCF) and elemental chlorine free ...
G. Marques, J. D. del Río, A. Gutiérrez   +2 more
semanticscholar   +2 more sources

Lipophilic Extractives from Eucalyptus globulus Pulp during Kraft Cooking Followed by TCF and ECF Bleaching

, 2001
E-mail address: delrio@irnase.csic.es (J.C. del Río)The chemical composition of lipophilic extractives in paper pulps from Eucalyptus globulus wood during kraft cooking followed by TCF (“totally chlorine free”) and ECF (“elemental chlorine free ...
A. Gutiérrez, J. Romero, J. Río
semanticscholar   +2 more sources

Hemicellulose and hexenuronic acid removal selectivity to give boosting effect to ECF bleaching

, 2021
Varies wood structure need difference way of treatment to get the appropriate quality of wood pulp. In pulp industry, wood chips should be cooked and bleached in order to have a good quality of pulp suitable for paper industry.
Trismawati, H. Y. Nanlohy, A. Zainal, D. Wikanaji, M. Setiyo   +4 more
semanticscholar   +1 more source

Manufacturing of high brightness dissolving pulp from sansevieria-trifasciata fiber by effective sequences processes

Communications in Science and Technology, 2022
The need of dissolving pulp (DP) for rayon fiber production is increasing rapidly in recent years. Sustainable sources of DP raw materials and an effective manufacturing process are urgently required.
Yusnimar, Evelyn, Azka Aman, Chairul, Suci Rahmadahana, Amun Amri   +5 more
doaj   +1 more source

Correlation Analysis for Fiber Characteristics and Strength Properties of Softwood Kraft Pulps from Different Stages of a Bleaching Fiber Line

BioResources, 2014
During sequential bleaching operations, pulp fiber properties are gradually changed due to mechanical and chemical treatments. In this study, the correlations between pulp or fiber properties such as kappa number, viscosity, total charge, fiber length ...
Benping Lin, Beihai He, Yanlan Liu, Lefan Ma   +3 more
doaj   +1 more source

A CORRELATION BETWEEN THE KAPPA NUMBER AND THE VENTORIM INDEX IN THE BLEACHING PROCESS [PDF]

Revista Árvore
The determination of the kappa number in the bleaching process is typically conducted with a pulp quantity between 3 and 4 grams, allowing for the calculation of values above four. However, after the oxidative extraction stage with hydrogen peroxide, the
Vitor Hideyoshi Hayashida Ribeiro, Evelyn Eduarda Gil dos Santos, Fabiana Clara Cezar Alves, Marianne Vitória Gil dos Santos, Higor Rogério Favarim, Gustavo Ventorim   +5 more
doaj   +1 more source

From Hypochlorite Bleaching to an ECF Sequence

JAPAN TAPPI JOURNAL, 2001
Today. the Japanese Pulp and Paper Industry is facing more stringent regulations on chloroform emission. Therefore. most of the pulp mills are looking for a way of decreasing chloroform emission formed during their conventional pulp bleaching. It is well known that chloroform is mainly generated during the hypochlorite stage. With this background.
Jean-Christophe Hostachy, Jerome Cudelou, Pierre Larnicol   +2 more
openaire   +3 more sources