SE8300041L - PROCEDURE FOR DELIGNIFICATION OF CELLULOSA MATERIAL WITH ACID IN AN ALKALIC MEDIUM AT ATMOSPHERIC PRESSURE - Google Patents

PROCEDURE FOR DELIGNIFICATION OF CELLULOSA MATERIAL WITH ACID IN AN ALKALIC MEDIUM AT ATMOSPHERIC PRESSURE

Info

Publication number
SE8300041L
SE8300041L SE8300041A SE8300041A SE8300041L SE 8300041 L SE8300041 L SE 8300041L SE 8300041 A SE8300041 A SE 8300041A SE 8300041 A SE8300041 A SE 8300041A SE 8300041 L SE8300041 L SE 8300041L
Authority
SE
Sweden
Prior art keywords
medium
delignification
alkaline
reaction vessel
oxygen
Prior art date
Application number
SE8300041A
Other languages
Swedish (sv)
Other versions
SE8300041D0 (en
Inventor
T R Hanser
W L Thornburg
Original Assignee
Procter & Gamble
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Procter & Gamble filed Critical Procter & Gamble
Publication of SE8300041D0 publication Critical patent/SE8300041D0/en
Publication of SE8300041L publication Critical patent/SE8300041L/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

A process for the delignification of cellulose material in an aqueous alkaline-oxygen medium in a reaction vessel comprises dispersing oxygen into the alkaline medium prior to introduction of the medium into the reaction vessel and continuously flowing the alkaline-oxygen medium through the reaction vessel. The alkaline-oxygen medium continuously flows through the cellulose material in the reaction vessel where the cellulose material is maintained at a consistency of from about 5% to about 15% in the alkaline-oxygen medium and where the reaction vessel is maintained at about atmospheric pressure and a temperature of from about 60.degree.C to 100.degree.C. The continuous flow of medium through the reactor results in reaction byproducts from the delignification reaction flowing from the cellulose material as a waste stream which is continuously discharged from the reactor.
SE8300041A 1982-01-08 1983-01-04 PROCEDURE FOR DELIGNIFICATION OF CELLULOSA MATERIAL WITH ACID IN AN ALKALIC MEDIUM AT ATMOSPHERIC PRESSURE SE8300041L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33844782A 1982-01-08 1982-01-08

Publications (2)

Publication Number Publication Date
SE8300041D0 SE8300041D0 (en) 1983-01-04
SE8300041L true SE8300041L (en) 1983-07-09

Family

ID=23324856

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8300041A SE8300041L (en) 1982-01-08 1983-01-04 PROCEDURE FOR DELIGNIFICATION OF CELLULOSA MATERIAL WITH ACID IN AN ALKALIC MEDIUM AT ATMOSPHERIC PRESSURE

Country Status (2)

Country Link
CA (1) CA1195811A (en)
SE (1) SE8300041L (en)

Also Published As

Publication number Publication date
SE8300041D0 (en) 1983-01-04
CA1195811A (en) 1985-10-29

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