Method and arrangement for oxygen delignification of cellulose pulp

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United States of America Patent

PATENT NO 7156952
APP PUB NO 20050061460A1
SERIAL NO

10939616

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Abstract

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The invention relates to a method and arrangement for alkaline oxygen delignification of cellulose pulp. By adding alkali in the final phase of the oxygen delignification one can ensure that an optimal predetermined end-pH is obtained. This provides advantages in the subsequent bleaching since the bleachability is substantially improved in the form of reduced need for bleaching chemicals.

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Patent Owner(s)

  • GL&V MANAGEMENT HUNGARY KFT.

International Classification(s)

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  • 2004 Application Filing Year
  • D21C Class
  • 53 Applications Filed
  • 27 Patents Issued To-Date
  • 50.95 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances2004200520062007200820092010201120120255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ragnar, Martin Karlstad, SE 11 25

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Patent Citation Ranking

  • 9 Citation Count
  • D21C Class
  • 3.49 % this patent is cited more than
  • 18 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges3621811101 - 1011 - 2021 - 3061 - 70100 +0510152025303540455055606570

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