Results 91 to 100 of about 6,870 (224)
Polyoxometalate/laccase-mediated oxidative polymerization of catechol for textile dyeing [PDF]
, 2011 The synergistic effect between polyoxometalates (POMs), namely K5[SiW11VVO40]·11H2O and H5[PMo10 VV2O40]·13H2O and laccase from ascomycete Myceliophthora thermophila has been employed for the first time in oxidative polymerization of catechol.
Evtuguin, D. V. +4 more
core +1 more source
COMPLETE CHARACTERIZATION OF BAGASSE OF EARLY SPECIES OF SACCHARUM OFFICINERUM-CO 89003 FOR PULP AND PAPER MAKING [PDF]
, 2010 Bagasse from early species of Saccharum officinerum-Co 89003 has 71.36% useful, long, and thick-walled fibers with good slenderness ratio, but the rigidity coefficient is less than that of Eucalyptus tereticornis and Leucaena leucocephala. The kink index
C. H. Tyagi +2 more
core
Impact of dissolved matter in the oxygen delignification stage
TAPPI Journal, 2017 The presence of dissolved matter in the pulp suspension in an oxygen (O2) delignification stage, consisting mainly of dissolved lignin, is normally considered to negatively affect the delignification rate due to the competing reactions between the fiber bound lignin and the lignin dissolved in the filtrate.
Caroline Wilke +2 more
openaire +1 more source
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
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
Hydrogen peroxide bleaching of cellulose pulps obtained from brewer’s spent grain [PDF]
, 2008 Brewer’s spent grain (BSG) was evaluated for bleached pulp production. Two cellulose pulps with different chemical compositionswere produced by soda pulping: one from the original raw material and the other from material pretreated by dilute acid ...
A Fortuny +30 more
core +1 more source
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
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
Policy vs. Consumer Pressure: Innovation and Diffusion of Alternative Bleaching Technologies in the Pulp Industry [PDF]
In the late 1980s and early 1990s, concern over dioxin in both paper products and wastewater led to the development of techniques that reduced the use of chlorine in the pulp industry. Both regulatory and consumer pressure motivated this change.
David Popp +2 more
core