SE8003910L - PROCEDURE FOR ENVIRONMENTALLY BLACKING OF CELLULOSAMASSA - Google Patents

PROCEDURE FOR ENVIRONMENTALLY BLACKING OF CELLULOSAMASSA

Info

Publication number
SE8003910L
SE8003910L SE8003910A SE8003910A SE8003910L SE 8003910 L SE8003910 L SE 8003910L SE 8003910 A SE8003910 A SE 8003910A SE 8003910 A SE8003910 A SE 8003910A SE 8003910 L SE8003910 L SE 8003910L
Authority
SE
Sweden
Prior art keywords
mass
oxygen
delignification
cellulose mass
cellulosamassa
Prior art date
Application number
SE8003910A
Other languages
Swedish (sv)
Other versions
SE441193B (en
Inventor
H O Samuelson
Original Assignee
Mo Och Domsjoe Ab
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 Mo Och Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Priority to SE8003910A priority Critical patent/SE441193B/en
Publication of SE8003910L publication Critical patent/SE8003910L/en
Publication of SE441193B publication Critical patent/SE441193B/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)

Abstract

With the use of oxygen and alkali for delignification and bleaching of chemical cellulose mass it is not possible to remove more than almost half of that in the cellulose mass after boiling the remaining lignin amount due to the risk of a serious and uncontrollable breakdown of the carbohydrates in the cellulose mass. Through the invention it has become possible to drive the oxygen delignification considerably further and it refers to a process for delignification of alkaline influxed cellulose mass, which is characterized by the combination, that the mass is first impressed with a kappa number of 8-20 by oxygen, on which the mass is activated by means of nitrogen dioxide in order to finally convey a Kappa number lower than 8 by means of oxygen.<IMAGE>
SE8003910A 1980-05-27 1980-05-27 Process for delignification of cellulose mass produced through alkaline influx of lignocelluloid content material SE441193B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8003910A SE441193B (en) 1980-05-27 1980-05-27 Process for delignification of cellulose mass produced through alkaline influx of lignocelluloid content material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8003910A SE441193B (en) 1980-05-27 1980-05-27 Process for delignification of cellulose mass produced through alkaline influx of lignocelluloid content material

Publications (2)

Publication Number Publication Date
SE8003910L true SE8003910L (en) 1981-11-28
SE441193B SE441193B (en) 1985-09-16

Family

ID=20341038

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8003910A SE441193B (en) 1980-05-27 1980-05-27 Process for delignification of cellulose mass produced through alkaline influx of lignocelluloid content material

Country Status (1)

Country Link
SE (1) SE441193B (en)

Also Published As

Publication number Publication date
SE441193B (en) 1985-09-16

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