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Canada, 1984; 85(2): T24–T27.
K. Kringstad, K. Lindstrom, Spent
Liquors from pulp bleaching. Environ.
Sci. Technol., 1984; 18(8): 236–238.
H.U. Suss, Die peroxidgestutzte Sauerstoffdelignifizierung
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Papier, 1986; 40(4): 150–153;
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Formation of AOX in Kraft pulp bleaching.
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C.H. Mobius, Abwasser der Papier- und
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S.E. Swanson, C. Rappe, B. Glas, Influence
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14 www.aet.org/reports/markets/trends90–
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Pulp Properties and Applications
Herbert Sixta
11.1
Introduction
Pulp represents the major raw material basis for two main applications: (a) for
Paper and board production, where the pulp fibers are mechanically modified to
Give a coherent sheet; and (b) for chemical conversion to products such as regenerated
Fibers and cellulose derivatives. The former is denoted as paper grade, the
Latter as dissolving grade pulp. Paper-grade pulp is by far the most dominant field
Of pulp production. With an annual production of about 190 million tonnes in
2002, paper-grade pulp accounts for almost 98% of the total wood pulp production
(see Chapter 1, Tab. 2, Tab. 3 in Part I). A large variety of different unbleached and
Bleached mechanical and chemical pulps comprise the raw material basis for
Paper and board products. The kraft process represents the dominating pulping
Technology (130 million tonnes in 2004), while the sulfite process (being the most
Important pulping method until the 1930s) continuously loses ground and finds
Application only in certain niche markets.
Sulfite pulp is characterized by rather week strength properties, and is typically
Used in products that require good sheet formation and moderate strength. Historically,
Sulfite has been most widely used in newsprint furnish. However, its
Importance in newsprint has been declining in recent years with the increasing
Use of stronger mechanical pulps such as thermomechanical pulp (TMP) and
Chemo-thermomechanical pulp (CTMP). However, their use is mostly restricted
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