The Synthesis Of Some Aminoazobenzene And Hetarylazo Disperse Dyes PDF Download

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The Synthesis of Some Aminoazobenzene and Hetarylazo Disperse Dyes

The Synthesis of Some Aminoazobenzene and Hetarylazo Disperse Dyes
Author: Afsaneh Taebi
Publisher:
Total Pages: 208
Release: 1993
Genre:
ISBN:

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A range of monoazo and disazo dyes based on 4-aminoazobenzene have been prepared. Differences in colour, dyeing and fastness properties between monoazo and disazo dyes have been reported. Their structure-property relationships with respect to the electronic spectra of the dyes, and to their coloration and fastness properties on polyester fibres have been investigated. 2-Amino-4,5-(4,6-; 4,7-; and 5,7-)dichlorobenzothiazoles have been prepared by the cyclisation of the corresponding dichlorophenyl- thiourea with concentrated sulphuric acid and ammonium bromide. The phenylthioureas were obtained from benzoylisothiocyanate and the appropriate amines, and subsequent hydrolysis of the resulting benzothioureas with aqueous sodium hydroxide or sulphuric acid. Coloration and lightfastness evaluations of the dichlorobenzo- thiazolylazo dyes on polyester fibres indicate that they can be viable alternative to anthraquinone based dyes of similar hue. Structure-property relationships with respect to the electronic spectra of the dyes have been investigated.


Synthesis and Properties of Some Disazo and Hetarylazo Dyes

Synthesis and Properties of Some Disazo and Hetarylazo Dyes
Author: Chien-Te Wu
Publisher:
Total Pages: 332
Release: 1996
Genre:
ISBN:

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A general survery of the preparation and application of disazo dyes, imidazole dyes, pyrazole dyes and their related intermediates has been made. A range of disazo dyes has been prepared by the synthesis of the ... methanesulphonate salts of aniline and its substituted analogues, and their subsequent coupling reaction in the synthesis of the intermediate monoazo dye followed by a second diazotization and coupling reaction to give the required disazo dyes. Colour-structure relationships are discussed, and PPP MO calculations used to evaluate colour and structure relationships. The synthesis of a series of azo colourants from diazotised arylamines and 4(5)-cyano- 5(4)-hydroxyimidazole is described. The dyes exhibit a large bathochromic shift of the visible absorption maxima relative to analogous dyes derived from carbocyclic coupling components. A series of pyrazolyazo dyes was also synthesized, the hues of which varied from yellow to red. The dyes did not a exhibit bathochromic shift of the visible absorption maxima relative to analogous dyes derived from carbocyclic diazo components, but gave bright hues characteristic of heterocyclic dyes. The colour-structure relationships are discussed.


Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards

Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards
Author:
Publisher:
Total Pages: 568
Release: 1995
Genre: Dissertations, Academic
ISBN:

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Theses on any subject submitted by the academic libraries in the UK and Ireland.


Textile Technology Digest

Textile Technology Digest
Author:
Publisher:
Total Pages: 570
Release: 1993
Genre: Textile fabrics
ISBN:

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The Chemistry and Application of Dyes

The Chemistry and Application of Dyes
Author: David R. Waring
Publisher: Springer Science & Business Media
Total Pages: 423
Release: 2013-11-11
Genre: Science
ISBN: 1468477153

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It is particularly appropriate that a volume concerned with dye chemistry should be included in the series Topics in Applied Chemistry. The development of the dye industry has been inexorably linked not only with the development of the chemical industry but also with organic chemistry itself since the middle of the last century. The position of dye chemistry at the forefront of chemical 1945 and more markedly so during the last advance has declined somewhat since 15 years, with pharmaceutical and medicinal chemistry assuming an increasingly prominent position. Nevertheless, dye production still accounts for a significant portion of the business of most major chemical companies. The field of dye chemistry has stimulated the publication of many books over the years but surprisingly few have concentrated on or even included the practical aspects of dye synthesis and application. Thus, the present volume is designed to fulfill that need and provide the reader with an account of advances in dye chemistry, concentrating on more recent work and giving, in a single volume, synthetic detail and methods of application of the most important classes, information which will be invaluable to both student and research chemist alike.


The Theory of Coloration of Textiles

The Theory of Coloration of Textiles
Author: Alan Johnson
Publisher: Hyperion Books
Total Pages: 552
Release: 1989
Genre: Dyes and dyeing
ISBN: 9780901956484

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Environmental Chemistry of Dyes and Pigments

Environmental Chemistry of Dyes and Pigments
Author: Abraham Reife
Publisher: John Wiley & Sons
Total Pages: 352
Release: 1996-01-05
Genre: Science
ISBN: 9780471589273

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In the last two decades the EPA and other national andinternational agencies have placed increasingly strict regulationson the manufacture and use of synthetic colorants. The pigment anddye industry has had to develop the technology necessary to analyzeand remediate pollutants in wastewater. Although these efforts haveproduced a considerable volume of information, until now, no singlebook has provided an organized, comprehensive treatment of theenvironmental chemistry of synthetic colorants. Environmental Chemistry of Dyes and Pigments is the firstcomprehensive reference to address the environmental problems posedby synthetic colorants, and to provide a forum for the solutionsproposed by industry, government, and academia. Focusing ondevelopments in the field over the past two decades, it deals withall aspects of colored wastewater treatment, the disposal of dyes,analytical methods, toxicity, and regulatory questions. In its coverage of wastewater treatment, this book addresses boththe most commonly used methods and those specifically designed toaddress pollution problems at the source by analyzing for andremoving dyes and pollutants from wastewater effluent. Throughout,real-world data on a wide variety of dyes and dye intermediates isprovided, as well as cost-effective strategies for dealing withwastewater treatment. In addition, several chapters are devoted to the perspectives ofnational and international experts on regulations governing themanufacture, handling, use, and disposal of synthetic dyes andpigments. The impact these regulations have had on both U.S. andforeign industry is also discussed. A complete, comprehensive, and up-to-date guide to pollutionprevention in the dyestuff and textile industries Environmental Chemistry of Dyes and Pigments is the onlyself-contained volume that focuses on the environmental impact ofsynthetic dyes and pigments. Contributions by international expertsfrom industry, academia, and government make this an indispensablebook for anyone dealing with the environmental problems posed bysynthetic colorants. It covers the entire range of environmentalissues, from waste treatment and analysis to pollution preventionand government regulations. Covers the latest wastewater treatment methods Shows how to use recycling and reusing methods effectively, whilecutting production costs Describes state-of-the-art technology, including the PACT(r)system Explains analysis techniques, including spectrometry andionization Covers legislative issues and the regulatory status of variouscompounds in both the United States and abroad Examines the various pollution prevention programs instituted bygovernment and industry Bridging the gap between industrial interests and environmentalconcerns, Environmental Chemistry of Dyes and Pigments stands as aninvaluable resource for scientists, researchers, and engineers inthe textile and dyestuff industries, and in the environmentalsciences. It is also an extremely useful text for environmentalscience students.