Last edited by Najin
Tuesday, July 28, 2020 | History

3 edition of bleaching of pulp found in the catalog.

bleaching of pulp

Technical Association of the Pulp and Paper Industry. Pulp Bleaching Committee.

bleaching of pulp

a project of the Pulp Bleaching Committee, Pulp Manufacture Division

by Technical Association of the Pulp and Paper Industry. Pulp Bleaching Committee.

  • 121 Want to read
  • 20 Currently reading

Published by TAPPI Press in Atlanta, GA .
Written in English

    Subjects:
  • Wood-pulp -- Bleaching.

  • Edition Notes

    Statementedited by R. P. Singh.
    ContributionsSingh, R. P. 1931-, Technical Association of the Pulp and Paper Industry. Pulp Purification Committee.
    Classifications
    LC ClassificationsTS1176.6.B6 T42 1979
    The Physical Object
    Paginationxxxii, 694 p. :
    Number of Pages694
    ID Numbers
    Open LibraryOL4752500M
    ISBN 100898520436
    LC Control Number78078362

    Jul 04,  · The consistency of the pulp has noticeable effects on the reaction rate during hydrogen peroxide bleaching. High consistency can reduce reaction time and effectiveness of the bleaching. It is also economical. At first, most of the bleaching plant installed lower consistency (3 to 6%), but at present higher consistency is desirable. Mar 17,  · Alongside the traditional aspects of pulping processes, pulp used in industry and paper pulps, this book describes all pulping processes used for paper and board manufacturing as well as waste liquor treatment, pulp bleaching and environmental aspects, while also covering pulp properties and saltybreezeandpinetrees.com: Herbert Sixta.

    Jun 17,  · bleaching of discoloured tooth - by soumyadeep jana Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. This book describes the most effective application of chemicals in bleaching. It starts with a brief overview of the history of bleaching and then focuses on recent developments. The ban of chlorine from bleaching pulp has shifted bleaching to environmentally sound procedures. Elementary Chlorine Free bleaching (ECF bleaching) and Totally Chlorine Free bleaching (TCF bleaching) are explained.

    The pulp produced up to this point in the process can be bleached to produce a white paper product. The chemicals used to bleach pulp have been a source of environmental concern, and recently the pulp industry has been using alternatives to chlorine, such as chlorine dioxide, oxygen, ozone and hydrogen peroxide. Alternatives to wood pulpPulp category: Production [M ton]. point brightness increase when bleaching a northern hardwood kraft pulp (species unspecified) with weight percent KHSO 5 (as "Oxone") on ovendry pulp at 10% consistency, pH 11, and 50°C for 3 h. Bleaching conditions were probably not optimized, and it seemed likely that better results might be .


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Bleaching of pulp by Technical Association of the Pulp and Paper Industry. Pulp Bleaching Committee. Download PDF EPUB FB2

The Bleaching of Pulp, Fifth Edition Authors: Alan W. Rudie, Ph.D., and Peter W. Hart, Ph.D. Previous editions of The Bleaching of Pulp have provided comprehensive information on the technology used to bleach wood pulps. The bleaching of pulp Hardcover – by W Howard (Ed) Rapson (Author) Be the first to review this itemAuthor: W Howard (Ed) Rapson.

Pulp bleaching has gone through dramatic changes in the last two decades. The process has moved from a discharge of toxic and poorly biodegradable effluent to a general acceptance of environmentally sound technology.

This book describes the production of high quality pulp with high brightness and good yield making the best use of saltybreezeandpinetrees.com by: Previous Pulp Bleaching Books Current Pulp Bleaching Book Organization of the Current Book References Cited 2.

Oxygen Delignification Introduction Comparison of Oxygen to Other Bleaching Agents Advantages and Disadvantages of Oxygen Delignification Chemistry of Oxygen Delignification.

This book describes the most effective application of chemicals in bleaching. It starts with a brief overview of the history of bleaching and then focuses on recent developments. The ban of. of bleac hing.

Designed as a text book and reference book, Pulp Bleaching: P rinc iples and Practice explains what bleac hing is, why pulp is bleached, and how bleaching is done. The book is divided into eight major sections which are sub-divided into 36 chapters covering all aspects of pulp bleaching.

The book also features discussions on. Alongside the traditional aspects of pulping processes, pulp used in industry and paper pulps, this book describes all pulping processes used for paper and board manufacturing as well as waste liquor treatment, pulp bleaching and environmental aspects, while also covering pulp.

Designed as a textbook and reference book, Pulp Bleaching: Principles and Practice explains what bleaching is, why pulp is bleached, and how bleaching is done. The book also features discussions on several "hot topics" in pulp bleaching, including elemental chlorine free bleaching, totally chlorine free bleaching, enzyme assisted bleaching, and bleaching of recycled fiber.

When bleaching mechanical pulp, one might use “% sodium peroxide on pulp.” This means that 10 pounds of sodium peroxide are used per ton of dry pulp.

Further relative proportions of NaOH, Na 2 S, and Na 2 CO 3 are determined by titration with HCl in so-called “ABC titrations.”.

lignin, bleaching serves to clean the pulp of dirt and foreign matter that escaped the digestion process. Bleaching also removes hemicellulose and extrac-tives (hemicellulose is nearly completely removed for the production of dissolved pulps).

Bleaching pulp adds significantly to its value as market pulp. PULP BLEACHING WITH HYDROGEN PEROXIDE AND PERACETIC ACID minute the pulp batch was hand-kneaded again for approximately ten seconds.

The P O stage at high tem-perature and pressure was carried out in stainless-steel autoclaves placed in a preheated oil bath. The consis-tency of pulp (i.e. mass fraction (w) of moisture-free. The bleaching chemicals do not mix homogeneously into the pulp without the use of highly effective mixing methods.

This results in a leveling of brightness increases. For this reason, the consistency is mainly limited to 25% in separate bleaching stages. This book describes the most effective application of chemicals in bleaching. It starts with a brief overview of the history of bleaching and then focuses on recent developments.

The ban of chlorine from bleaching pulp has shifted bleaching to environmentally sound procedures. Historical reviews of the early scientific literature on peroxide pulp bleaching have been given by several authors []. Peroxide was rapidly adopted in the mid-twentieth century for its ability.

Bleaching of wood pulp is the chemical processing of wood pulp to lighten its color and whiten the pulp. The primary product of wood pulp is paper, for which whiteness (similar to, but distinct from brightness) is an important characteristic.

Pulp Bleaching: Principles and Practice by Technical Association of the Pulp and Paper Industry and a great selection of related books, art and collectibles available now at saltybreezeandpinetrees.com - Pulp Bleaching: Principles and Practice by Technical Association of the Pulp and Paper Industry.

Book. The Bleaching of Pulp. of mixed hardwood pulp substantially reduced the usage of bleaching chemicals and the generation of pollutants during the bleaching of pulp along with the. The bleaching quality of the pulp is improved by the use of mechanical pre-treatment in which favours the decrease or removal of the silica and other unwanted particles from the raw material.

In Sweden, a dry fractionation system was developed which is composed of a shredding, chopping, milling compartment in a disc mill and also used for the screening of reed canary saltybreezeandpinetrees.com: Mayowa Akeem Azeez.

Alongside the traditional aspects of pulping processes, pulp used in industry and paper pulps, this book describes all pulping processes used for paper and board manufacturing as well as waste liquor treatment, pulp bleaching and environmental aspects, while.

Pulp bleaching has gone through dramatic changes in the last two decades. The process has moved from a discharge of toxic and poorly biodegradable effluent to a general acceptance of environmentally sound technology.

This book describes the production of high quality pulp with high brightness 1/5(1). Pulp and Paper Chemistry and Technology Volume 2 This project was supported by a generous grant by the Ljungberg Foundation (Stiftelsen Erik Johan Ljungbergs Utbildningsfond) and originally published by the KTH Royal Institute of Technology as the “Ljungberg Textbook”.Dec 01,  · Peroxides are important bleaching agents, industrially, for cellulosic products.

They are also used in detergents. Peroxides can degrade cellulose as well as decolorize it and remove stains. Both free radicals and perhydroxyl anions have been suggested as the intermediates in the reactions occurring between cellulosic products and hydrogen peroxide.

The proposed mechanisms are reviewed with Cited by: Mar 09,  · This one’s interesting. Pulping a book is stripping a book of its cover and having the torn book pulped and recycled in the plant. The severed cover is sent back to the publishing house as evidence that the book has been destroyed or discarded or.