Method for controlling an oxygen bleaching

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4840703
SERIAL NO

07213516

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A method for controlling an oxygen-bleaching process of lignocellulosic pulp to a desired degree of delignification. The pulp is passed at a substantially constant temperature into a bleaching reactor wherein the pulp has a substantially constant level at its outlet. The hydrostatic pressure is measured and the quantity of oxygen fed into the reactor is adjusted to reach a desired degree of delignification.

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Patent Owner(s)

Patent OwnerAddress
RAUMA-REPOLA OYSNELLMANNINKATU 13 00170 HELSINKI

International Classification(s)

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  • 1988 Application Filing Year
  • D21C Class
  • 63 Applications Filed
  • 1 Patents Issued To-Date
  • 1.59 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19881989199019911992199319940255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Malmsten, Erkki Rauma, FI 1 19

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Patent Citation Ranking

  • 19 Citation Count
  • D21C Class
  • 0 % this patent is cited more than
  • 36 Age
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