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SE7601935L - WAY TO BLEACH LIGNINCELLULOSAMASSA - Google Patents

WAY TO BLEACH LIGNINCELLULOSAMASSA

Info

Publication number
SE7601935L
SE7601935L SE7601935A SE7601935A SE7601935L SE 7601935 L SE7601935 L SE 7601935L SE 7601935 A SE7601935 A SE 7601935A SE 7601935 A SE7601935 A SE 7601935A SE 7601935 L SE7601935 L SE 7601935L
Authority
SE
Sweden
Prior art keywords
pulp
delignification
lignincellulosamassa
bleach
way
Prior art date
Application number
SE7601935A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
R B Phillips
Original Assignee
Int Paper Co
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 Int Paper Co filed Critical Int Paper Co
Publication of SE7601935L publication Critical patent/SE7601935L/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

During the delignification and bleaching of lignocellulosic pulp fibers with oxygen in an alkaline medium, the rate of delignification can be increased, while simultaneously protecting the pulp against excessive losses in viscosity, by contacting a slurry of lignocellulosic pulp fibers with a solution of watersoluble salt of a divalent transition metal selected from the group consisting of mangenous, nickelous, cobaltous, and vanadous ions having a concentration at least about 0.27% to about 1.10%, based on the weight of oven-dried (O.D.) pulp.
SE7601935A 1975-06-30 1976-02-19 WAY TO BLEACH LIGNINCELLULOSAMASSA SE7601935L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US59157275A 1975-06-30 1975-06-30

Publications (1)

Publication Number Publication Date
SE7601935L true SE7601935L (en) 1976-12-31

Family

ID=24366990

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7601935A SE7601935L (en) 1975-06-30 1976-02-19 WAY TO BLEACH LIGNINCELLULOSAMASSA

Country Status (9)

Country Link
JP (1) JPS525302A (en)
AU (1) AU504749B2 (en)
BR (1) BR7602753A (en)
CA (1) CA1043514A (en)
FI (1) FI761496A (en)
FR (1) FR2316376A1 (en)
NO (1) NO761777L (en)
SE (1) SE7601935L (en)
ZA (1) ZA762002B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998020199A1 (en) * 1996-11-06 1998-05-14 Macmillan Bloedel Limited Vanadyl catalyzed oxygen treatment of lignocellulosic materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE380298B (en) * 1974-03-14 1975-11-03 Mo PROCEDURE FOR DELIGNIFICATION BY ACID-ALKALI TREATMENT OF LIGNOCELLUOSA-CONTAINING MATERIAL
JPS5039161B2 (en) * 1974-12-23 1975-12-15

Also Published As

Publication number Publication date
CA1043514A (en) 1978-12-05
ZA762002B (en) 1977-04-27
AU1261776A (en) 1977-10-06
BR7602753A (en) 1977-05-10
NO761777L (en) 1977-01-03
AU504749B2 (en) 1979-10-25
FI761496A (en) 1976-12-31
FR2316376A1 (en) 1977-01-28
JPS525302A (en) 1977-01-17

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