Studies on the utilization of Pinus pinaster bark

Part 1: Chemical constituents

Summary

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

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The authors are grateful to Prof. E. Patiño for the revision of the English version of this manuscript

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Vázquez, G., Antorrena, G. & Parajó, J.C. Studies on the utilization of Pinus pinaster bark. Wood Sci.Technol. 21, 65–74 (1987). https://doi.org/10.1007/BF00349718

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Keywords

  • Cellulose
  • Benzene
  • Hexane
  • Lignin
  • Polysaccharide