Results 91 to 100 of about 10,608,979 (207)
A MATHEMATICAL MODEL OF THE KRAFT PULPING PROCESS
, 1982 In the kraft pulping process used to produce paper, the lignin, hemicelluloses and extractives in the wood are dissolved to free the cellulose fibers. A solution containing NaOH and NaSH is employed at 150 to 170(DEGREES)C.
CHRISTENSEN, TOR
core +1 more source
Variables Affecting Impregnation during Kraft Pulping [PDF]
, 1982 Introduction The purpose of this report was twofold. First, a pulping aid was evaluated for its effects on pulp properties. Then, the pulping aid was used in conjunction with a reduction in the times to temperature for several cooks, to see if the ...
Corriveau, William J.
core +1 more source
BioResourcesDependence curves for the kappa number of digester pulp (KNDP), total pulp yield (TY), screened pulp yield (SY), and reject content in digester pulp (RDP) as a function of the kappa number of screened pulp (KNSP) were determined based on the results of ...
Dariusz Danielewicz
doaj
Utilization of sodium borohydride (NaBH4) in kraft pulping process.
Journal of environmental biology, 2010 Aim of this study is to investigate the effect of adding sodium borohydride (NaBH4) in kraft pulping. First of all, six kraft cooks were carried out for varying active alkali and sulfidity. Then, kraft methods for K1 and K6 cooks were modified by adding 1, 2 and 3% NaBH4.
Abdullah, Istek, Erdem, Gonteki
openaire +1 more source
The Silicone Type Defoamers for Kraft Pulp Making Process
JAPAN TAPPI JOURNAL, 2001 In the kraft pulp making process, extracted lignin liquid (black liquor) contains various surfactive materials which are derived from lignin. That means black liquor tends to make foam so easily that the kraft pulp making process is troubled with foam at any time.
openaire +1 more source
Ways to tailor-make xylan for kraft pulping
, 2011 Genetic manipulation of trees in order to produce raw material with different chemical composition, which will perform better in pulping and bleaching, has gained large interest the last decade. Most efforts have been on increasing cellulose content, and
Lindström, Mikael, +3 more
core
Acta Scientiarum: Technology, 2010 O trabalho teve por objetivo estudar a cinética da remoção dos extrativos da madeira de Eucalyptus grandis durante polpação Kraft. As polpações foram efetuadas em reatores tubulares de aço, usando-se madeira na forma de serragem nas seguintes condições ...
Camila Sarto, Cláudio Angeli Sansigolo
doaj
Journal of Natural FibersThis study optimizes and characterizes the kraft pulping process for Gigantochloa levis (GL), a native Malaysian bamboo species, to evaluate its potential as a sustainable feedstock for pulp and paper production. Optimization was performed using response
Husain Siti nor Hawanis +8 more
doaj +1 more source
The possibility of controlling formation and cleavage reactions of HexA during kraft pulping
, 2006 During kraft pulping, the side groups in the xylan backbone, 4-O-methyl-D-glucuronic acid (MeGlcA), are partly converted to hexenuronic acid (HexA). Simultaneously, degradation reactions of these side groups take place.
Danielsson, Sverker, +2 more
core
Influence of sulfidity on kraft pulping process
, 2019 O presente trabalho teve por objetivo avaliar a influência da sulfidez do licor branco sobre a eficiência do processo kraft de polpação e qualidade da polpa celulósica obtida, bem como determinar as condições ótimas de processo.
Gomes, Regina Maria
core +1 more source