Wood Extractives

Chemical extractives of the tropical wood

1 Wallaba (Eperua falcata) is a tropical wood which is known to have naturally low swelling 2 characteristics. Samples of wallaba heartwood were subjected to differential solvent 3 extraction. Wood pieces that were extracted with methanol experienced significantly higher 4 swelling after rehydration from oven dry to 96% relative humidity in comparison to non-5 extracted samples and samples extr...

Phenolic Extractives and Natural Resistance of Wood

Investigation of Interaction between Wood-extractives and Metal Ions

Contribution of Extractives to Fungal and Termite Resistance of Brazilian Wood Bagassa guianensis AUBL

The heartwood of Bagassa guianensis AUBL., which grows widely in South America, is empirically known to be durable against fungal and insects decay. In this study, we evaluated the fungal and termite resistance of B. guianensis wood, and conducted the separation of substances having the antifungal and antitermite properties. As the results, B. guianensis wood has excellent durability against bo...

Lipophilic extractives in process waters during manufacturing of totally chlorine free kraft pulp from eucalypt wood.

The chemical composition of lipophilic extractives from process waters throughout a totally chlorine free (TCF) bleaching sequence after kraft pulping of eucalypt wood has been studied. These compounds are among the most problematic wood constituents for both TCF and zero liquid effluent (ZLE) processes, since they tend to accumulate in circuits resulting in the formation of the so-called pitch...