Influence of basic density and chemical composition of wood for the pulp industry: a case study

ABSTRACT

The Eucalyptus and Pinus represent the main woody species in planted forests used by the pulp sector in Brazil, and for this reason, many studies have been carried out correlating the wood technological characteristics and the pulp quality. The objective of this work was to perform a literature review about studies that correlate basic density and wood chemical composition with pulping process variables and pulp characteristics. The work followed the principle of an exploratory study, through a literature review was used. The main studies used in this research showed that the best clones used in the eucalyptus pulp industry had a basic density varying between 400 and 550 kg.m^-3, a unbleached pulp yield varying between 45 and 55%, a kappa number of 17-18 and a viscosity of brown pulp over than 1200 g.cm^-3 . Com relação aos melhores clones do gênero Pinus. Regarding to the best Pinus genus clones, they had a basic density varying between 370 and 440 kg.m^-3, lower than the Eucalyptus variation; similar yield to the Eucalyptus studies, ranging from 45 to 51%; and kappa number of 30-32, higher than that used in cooking with eucalyptus wood.

Keywords
Wood quality; Eucalyptus; Pinus; Cellulose