Chemicals obtained from wood

Type :

Presentation

Pages :

6 pages

Format :

.doc

Published date :

12/08/2008

Category :

Science & technology

Sub category :

Biology

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Summary :

Introduction.
Extractives.
1. Terpenes.
2. Resin acids.
3. Fatty acids.
4. Phenolics.
5. Pharmaceuticals.
Polysaccharides.
Lignin.
Hydrolysis and fermentation.
1. The sacchari?cation of wood.
2. The disadvantage.
3. Another product of fermentation processes.
Thermal degradation.
Conclusion.

Abstract

A wide array of both commodity and specialty chemicals can be derived from wood, either as a primary product or by-product of another process. The technologies in which chemicals are the primary products include thermal degradation, hydrolysis/ fermentation, direct collection, and extraction methods. chemicals collected as by-products generally come from ï¬ber-producing processes, including pulp and paper and steam explosion. While cellulose, lignin, and derivatives thereof could be classiï¬ed as chemicals derived from wood, the current review will be limited to low-molecular-weight chemicals from wood. The synthesis and utilization of various chemicals from renewable resources have received considerable recent attention through research efforts in green chemistry. Perhaps the oldest of the chemicals produced from wood are those derived from the extractives. The term 'naval stores' provides a clue to the water-prooï¬ng applications for which these chemicals were originally used. The extractives can broadly be divided into terpenes, resin acids, and fatty acids.