SE8404949L - PROCEDURES FOR PREPARING PAPER Pulp - Google Patents

PROCEDURES FOR PREPARING PAPER Pulp

Info

Publication number
SE8404949L
SE8404949L SE8404949A SE8404949A SE8404949L SE 8404949 L SE8404949 L SE 8404949L SE 8404949 A SE8404949 A SE 8404949A SE 8404949 A SE8404949 A SE 8404949A SE 8404949 L SE8404949 L SE 8404949L
Authority
SE
Sweden
Prior art keywords
pulp
alkali
procedures
temp
concn
Prior art date
Application number
SE8404949A
Other languages
Swedish (sv)
Other versions
SE8404949D0 (en
SE454185B (en
Inventor
H Norrstrom
R Andersson
K Idner
Original Assignee
Aga 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 Aga Ab filed Critical Aga Ab
Priority to SE8404949A priority Critical patent/SE454185B/en
Publication of SE8404949D0 publication Critical patent/SE8404949D0/en
Publication of SE8404949L publication Critical patent/SE8404949L/en
Publication of SE454185B publication Critical patent/SE454185B/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/08—Pretreatment of the finely-divided materials before digesting with oxygen-generating compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/14—Disintegrating in mills
    • D21B1/16—Disintegrating in mills in the presence of chemical agents
    • 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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds

Abstract

Lignocellulose material is treated in liquid or gas phase in an alkali environment. The treatment is carried out in oxygen under certain conditions of pressure, pulp concentration, temp. time and chemical concn. The relationship between extracted fibre quantity and the input material is 80-95%. The quantity of alkali used is 1-200 Kg per tonne of dry pulp. The process temp. is 20-200 deg.C and the oxygen pressure 1-10 Kg/cm2. The alkali is NaOH,Na2CO3,Mg(OH)2, or Mg CO3. The pulp concn. is 1-50%. The process time is at the most 60 minutes. A catalyst or inhibitor is present e.g. metal salt, metal complex or complex former.
SE8404949A 1984-10-03 1984-10-03 Paper pulp prodn. SE454185B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8404949A SE454185B (en) 1984-10-03 1984-10-03 Paper pulp prodn.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8404949A SE454185B (en) 1984-10-03 1984-10-03 Paper pulp prodn.

Publications (3)

Publication Number Publication Date
SE8404949D0 SE8404949D0 (en) 1984-10-03
SE8404949L true SE8404949L (en) 1984-10-03
SE454185B SE454185B (en) 1988-04-11

Family

ID=20357226

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8404949A SE454185B (en) 1984-10-03 1984-10-03 Paper pulp prodn.

Country Status (1)

Country Link
SE (1) SE454185B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752904B2 (en) 2000-02-09 2004-06-22 Akzo Nobel N.V. Process for removal of lignin from lignocellulosic material
US20040200586A1 (en) 2002-07-19 2004-10-14 Martin Herkel Four stage alkaline peroxide mechanical pulping
CA2450464C (en) 2001-07-19 2009-12-22 Andritz Inc. Four stage alkaline peroxide mechanical pulping

Also Published As

Publication number Publication date
SE8404949D0 (en) 1984-10-03
SE454185B (en) 1988-04-11

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