1. Home
  2. Fundamental sciences
  3. Physics and chemistry
  4. The Chemistry of Pulping Processes for the Production of Unbleached Lignocellulosic Pulps

  5. Chemical cooking of wood

Article | REF: AF6821 V1

The Chemistry of Pulping Processes for the Production of Unbleached Lignocellulosic Pulps

Authors: Gérard MORTHA, Anne-Laurence DUPONT

Publication date: January 10, 2016 | Lire en français

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!

Automatically translated using artificial intelligence technology (Note that only the original version is binding) > find out more.

    A  |  A

    3. Chemical cooking of wood

    3.1 General aspects

    As mentioned above, the chemical cooking of wood extracts more than 90% of the lignin from the fibers and eliminates almost all the mineral and organic extractives initially present in the wood. The counterpart is the dissolution of a significant quantity of polysaccharides, mainly hemicelluloses, and partial depolymerization of cellulose. The parameters used to control the cooking process are the reagent load and the liquor/wood ratio, which determine the concentration of reagents, as well as the time taken for the temperature to rise and the duration of the stage. The quality of the resulting pulp is measured by two main control parameters:

    1) The kappa index (KI) (see Norms and standards in the For further information section): this is...

    You do not have access to this resource.

    Exclusive to subscribers. 97% yet to be discovered!

    You do not have access to this resource.
    Click here to request your free trial access!

    Already subscribed? Log in!

    The Ultimate Scientific and Technical Reference

    A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
    + More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
    From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

    This article is included in

    Physics and chemistry

    This offer includes:

    Knowledge Base

    Updated and enriched with articles validated by our scientific committees

    Services

    A set of exclusive tools to complement the resources

    Practical Path

    Operational and didactic, to guarantee the acquisition of transversal skills

    Doc & Quiz

    Interactive articles with quizzes, for constructive reading

    Subscribe now!

    Ongoing reading
    Chemical cooking of wood
    Outline