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SE8405984L - PROCEDURE FOR SULFIT CELLULOSA PREPARATION - Google Patents

PROCEDURE FOR SULFIT CELLULOSA PREPARATION

Info

Publication number
SE8405984L
SE8405984L SE8405984A SE8405984A SE8405984L SE 8405984 L SE8405984 L SE 8405984L SE 8405984 A SE8405984 A SE 8405984A SE 8405984 A SE8405984 A SE 8405984A SE 8405984 L SE8405984 L SE 8405984L
Authority
SE
Sweden
Prior art keywords
solution
sulfit
cellulosa
procedure
preparation
Prior art date
Application number
SE8405984A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8405984D0 (en
Inventor
P Molkentin-Matilainen
E Kaila
S Kuusela
S Hyverinen
E Sjostrom
Original Assignee
Serlachius Oy
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 Serlachius Oy filed Critical Serlachius Oy
Publication of SE8405984D0 publication Critical patent/SE8405984D0/en
Publication of SE8405984L publication Critical patent/SE8405984L/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
    • D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes

Landscapes

  • Paper (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Immobilizing And Processing Of Enzymes And Microorganisms (AREA)

Abstract

In a process for producing sulphite pulp, such a strong digesting solution is drawn into the chippings in the initial stage of digestion that more than 35% of the total quantity of liquid can be removed, but such a quantity of solution is left in the digester that the solution can circulate through a calorifier for indirectly raising the temperature of final digestion. Preferably, the digesting solution/wood weight ratio is reduced to a value of 2.4:1.
SE8405984A 1983-11-29 1984-11-27 PROCEDURE FOR SULFIT CELLULOSA PREPARATION SE8405984L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI834358A FI73012C (en) 1983-11-29 1983-11-29 Process for boiling sulfite cellulose.

Publications (2)

Publication Number Publication Date
SE8405984D0 SE8405984D0 (en) 1984-11-27
SE8405984L true SE8405984L (en) 1985-05-30

Family

ID=8518141

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8405984A SE8405984L (en) 1983-11-29 1984-11-27 PROCEDURE FOR SULFIT CELLULOSA PREPARATION

Country Status (8)

Country Link
JP (1) JPS60134088A (en)
DD (1) DD229446A5 (en)
DE (1) DE3440716A1 (en)
FI (1) FI73012C (en)
HU (1) HUT36873A (en)
NO (1) NO844740L (en)
PL (1) PL145660B1 (en)
SE (1) SE8405984L (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE62376C (en) * O. SCHMIDT in Berlin N., Weifsen-I burgerstr. 48 Process for the production of pulp
DE527950C (en) * 1928-12-30 1931-06-24 I G Farbenindustrie Akt Ges Process for the production of sulphite pulp

Also Published As

Publication number Publication date
HUT36873A (en) 1985-10-28
FI73012C (en) 1987-08-10
PL145660B1 (en) 1988-10-31
DE3440716A1 (en) 1985-06-05
FI834358A (en) 1985-05-30
NO844740L (en) 1985-05-30
JPS60134088A (en) 1985-07-17
FI73012B (en) 1987-04-30
PL250632A1 (en) 1985-07-16
SE8405984D0 (en) 1984-11-27
DD229446A5 (en) 1985-11-06
FI834358A0 (en) 1983-11-29

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Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 8405984-9

Effective date: 19881230