Analytical Methods in Wood Chemistry, Pulping, and PapermakingEero Sjöström, Raimo Alen Springer Science & Business Media, 9 mar 2013 - 318 pagine In its broadest sense, and according to the traditional conception, wood chemistry is a comprehensive discipline, ranging from fundamental studies to practical applications. The manifold constituents, located in different morphological regions in the wood, results in an extreme complexity of wood chemistry. Ever more sophisticated endeavors needing fundamental studies and advanced analytical methods are necessary in order to delve deeper into various problems in pulping and papermaking. Gradually, new, improved ana lytical methods, originally developed for research purposes, are currently replacing many of the old "routine" methods in practical applications. Because of the expanse of the subject, an attempt to write a book of this size about analytical methods seems, perhaps, too ambitious. Of course, a whole book series of several volumes would be necessary to cover this topic completely. However, there is undoubtedly a need for a more condensed presentation which does not go into experimental details, but is limited to the basic principles of the analytical methods and illustrates their applica tions. The emphasis is on more advanced and potential methods, and partic ularly on those based on different types of spectroscopy and chromatography. |
Dall'interno del libro
Risultati 1-5 di 46
Pagina 1
... cellulose are available, wood obtained from forest trees is the predominant material for making pulp and paper. Forests thus form the basis for the pulp and paper industry. Trees are seed-bearing plants (Spermatophytae), which are ...
... cellulose are available, wood obtained from forest trees is the predominant material for making pulp and paper. Forests thus form the basis for the pulp and paper industry. Trees are seed-bearing plants (Spermatophytae), which are ...
Pagina 3
... (cellulose and various hemicelluloses). A rough estimate of the total content of polysaccharides can be obtained by subjecting extractive-free wood to an oxidative delignification (usually with sodium chlorite), after which the ...
... (cellulose and various hemicelluloses). A rough estimate of the total content of polysaccharides can be obtained by subjecting extractive-free wood to an oxidative delignification (usually with sodium chlorite), after which the ...
Pagina 4
... Cellulose. In most pulpwood species, 40-45% of the dry substance is cellulose. The chemical structure of cellulose has been clarified in detail, but its super- molecular state and its polymer properties are not yet fully understood.
... Cellulose. In most pulpwood species, 40-45% of the dry substance is cellulose. The chemical structure of cellulose has been clarified in detail, but its super- molecular state and its polymer properties are not yet fully understood.
Pagina 5
... cellulose is of the order of 1 0 000 and lower than that of cotton cellulose (about 15000). Cellulose is soluble only in a few solvents, of which the most common are cupriethylenediamine (CED) and cadmiumethylenediamine (Cadoxen) ...
... cellulose is of the order of 1 0 000 and lower than that of cotton cellulose (about 15000). Cellulose is soluble only in a few solvents, of which the most common are cupriethylenediamine (CED) and cadmiumethylenediamine (Cadoxen) ...
Pagina 9
... cellulose. Solutions of isolated lignin samples typically have a low viscosity, which means that the structure of the dissolved lignins is compact. The polymer H-CO H — CH,OH OH OH Fig. 1.3. Simplified representation of a segment of ...
... cellulose. Solutions of isolated lignin samples typically have a low viscosity, which means that the structure of the dissolved lignins is compact. The polymer H-CO H — CH,OH OH OH Fig. 1.3. Simplified representation of a segment of ...
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Altre edizioni - Visualizza tutto
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alén Anteprima limitata - 1998 |
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alen Anteprima non disponibile - 2010 |
Analytical Methods in Wood Chemistry, Pulping, and Papermaking Eero Sjöström,Raimo Alén Anteprima non disponibile - 2012 |
Parole e frasi comuni
acetic acids addition alkaline amounts analysis analyzed applied aromatic atoms black liquors bleaching bonds carbohydrates carbon carboxylic acids cell wall cellulose characterization Chem chemical chemistry chlorine chromatography column complex components composition compounds concentrations contain degradation depends derivatives derivatization detection determination dissolved distribution effect effluents electrons elements especially esters et al ether example extractives fibers followed formed fraction give hardwood hemicelluloses HMWMs hydrolysis hydroxyl groups identification important inorganic ions isolated kraft pulps lignin mainly mass material measured methods methyl mill mixture molecular weight Niemelä obtained occur OH OH organic origin oxidation phenolic polymer polysaccharides possible preparation present procedure quantitative reaction residual resin acids sample separation Sjöström sodium softwood solid soluble solution solvent spectra spectroscopy standard structures studies sulfite surface Table Tappi techniques tion types units usually various wood xylan York ОН