Results 91 to 100 of about 6,920 (226)
Ciência Florestal, 2010 The efficiency of oxygen delignification is very low for pulps of low number kappa and with high concentrations of hexenuronic acids, therefore the oxygen does not react with these acids, so being minimum the elimination of these during the oxygen ...
Cristiane Pedrazzi +4 more
doaj
Biomimetic TCF Bleaching of Pulp by Simple Inorganic Complexes of Cupric/Cobalt Acetate [PDF]
Iranian Journal of Chemistry & Chemical Engineering, 2014 Oxygen delignified kraft pulp from eucalyptus (E. urophylla × E. grandis) was catalytically pretreated in aerobic condition using ammonium persulfate in present of catalists like cupric acetate and/or cobalt acetate in acetic acid-water solution, i.
Xue Fei Zhou
doaj
ENHANCED SELECTIVITY OF OXYGEN DELIGNIFICATION BY CHERRY AND GUAR GUM ADDITIVES
Cellulose Chemistry and TechnologyNatural polysaccharide-based gums produced by plants in response to biotic or abiotic factors are used in various industries due to their biodegradability, renewability, biocompatibility, and non-toxic properties. This study examined the use of these gums in a new application, such as adding them to the delignification liquor to decrease the negative ...
Iskefyeli, Ayşegül (58880064800) +4 more
openaire +2 more sources
Fungal laccases as tools for biodegradation of industrial dyes [PDF]
, 2016 Laccases are blue copper oxidases, found in some plants and secreted by a wide range of ligninolytic fungi. These enzymes are well known for their ability in oxidizing several organic compounds, mainly phenolics and aromatic amines, at the expenses of ...
Cocco, Gianmarco +3 more
core +1 more source
Ciência Florestal, 2014 This study aimed to evaluate the sensitiveness of the information obtained for the residual lignin from Eucalyptus grandis kraft pulps analyzed through the nitrobenzene oxidation, copper oxide (CuO) reduction and acidolysis techniques.
Gustavo Ventorim +4 more
doaj
Pulp strength enhancement by oxygen delignification
, 2022 Oxygen delignification is widely used in the pulp and paper industry as a part of delignification process between the kraft cook and bleaching. However, its potential has not been fully utilized. Rather than an intermediate process between cooking and bleaching, oxygen delignification is a strong oxidizing agent with powerful effects on the pulp ...
openaire +1 more source
Bleaching with Hydrogen Peroxide. A Review [PDF]
, 2008 An extensive review of 110 references reflecting the state of the art in the bleaching of pulp with hydrogen peroxide is ...
Calatrava, S.F., Jiménez, L., Ramos, E.
core
BioResources, 2015 The experimental research, process design principles, and engineering practice of a bagasse pulp production line that could run both totally chlorine-free (OP)Q(PO) and elemental chlorine-free (OP)D(EOP) bleaching sequences are discussed in this paper ...
Zhi Li, Jun Li, Jun Xu, Li-huan Mo
doaj +1 more source
Kinetics of laccase mediator system delignification of an Eucalyptus globulus Kraft pulp [PDF]
, 2006 Comunicação da qual só está disponível o resumo.Laccase mediator system (LMS) was applied to one industrial Eucalyptus globulus kraft pulp with kappa numbers 15.2, using violuric acid (VA) as mediator. The objective of the present work is to quantify the
Anjos, O., Gilherme, S., Simões, R.
core
Evaluation of Hemp Root Bast as a New Material for Papermaking
BioResources, 2013 Industrial hemp is a non-wood fiber material that can be used for papermaking due to a high yield of hemp raw material and high-quality physical properties of its pulp.
Cheng Miao +3 more
doaj +1 more source