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 58
Pagina ix
... Bleaching 80 4.3 Detection and Classification 85 4.3.1 Detection of Lignin 85 4.3.2 Classification of Lignins 88 4.4 Quantitative Analysis 90 4.4. 1 Wood and Pulps 90 4.4.2 Aqueous Solution 92 4.5 Isolation of Lignin 92 4.5.1 Wood 92 ...
... Bleaching 80 4.3 Detection and Classification 85 4.3.1 Detection of Lignin 85 4.3.2 Classification of Lignins 88 4.4 Quantitative Analysis 90 4.4. 1 Wood and Pulps 90 4.4.2 Aqueous Solution 92 4.5 Isolation of Lignin 92 4.5.1 Wood 92 ...
Pagina 15
... are the main constituents of bleached chemical pulps. Their average DPW is typically within the limits of 2000-4000 and 50-100, respectively. A large part of the original Chemical Composition of Wood and Pulps 15 X XI.
... are the main constituents of bleached chemical pulps. Their average DPW is typically within the limits of 2000-4000 and 50-100, respectively. A large part of the original Chemical Composition of Wood and Pulps 15 X XI.
Pagina 16
... bleaching is rather low (2-5%) and only traces of it (<0.1%) are present in fully bleached pulps. For direct analysis of small Table 1.3. Examples of typical carbohydrate compositions of common bleached pulps (relative percents) Pulp ...
... bleaching is rather low (2-5%) and only traces of it (<0.1%) are present in fully bleached pulps. For direct analysis of small Table 1.3. Examples of typical carbohydrate compositions of common bleached pulps (relative percents) Pulp ...
Pagina 17
... bleaching process and cause quality problems in the final pulp and paper. The pulp extractives are composed of a complex mixture of extremely lipophilic and sparingly soluble components of the original wood extractives as well as their ...
... bleaching process and cause quality problems in the final pulp and paper. The pulp extractives are composed of a complex mixture of extremely lipophilic and sparingly soluble components of the original wood extractives as well as their ...
Pagina 18
... bleaching agent at least in Nordic countries, but chlorine dioxide is still in widespread use. Since even traces of some chlorinated organic compounds can be extremely toxic, very sensitive analyses, based on mass spectrometry, have ...
... bleaching agent at least in Nordic countries, but chlorine dioxide is still in widespread use. Since even traces of some chlorinated organic compounds can be extremely toxic, very sensitive analyses, based on mass spectrometry, have ...
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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