Studies on the utilization of Pinus pinaster bark. Part 2: Kinetics and yields of alkaline extractions

摘要: The chemical constituents of Pinus pinaster bark are studied, as a first step study devoted to its benefit. analyzed samples showed an average content 0.5% ash, 2.5% waxes (measured the hexane and benzene soluble fractions), 39.3% materials in polar organic solvents, water NaOH solutions, 28.9% polysaccharides (roughly half corresponding cellulose), 29.6% Klason lignin, 59.7% aromatic 1.0% suberin. fraction with potential utility, formed by formaldehyde-condensable polyphenols polysaccharides, is over 60 weight percent bark. results compared those determined for other pine species.