SE9401769L - Tile impregnation in pulp cooking with sulphidic alkali - Google Patents

Tile impregnation in pulp cooking with sulphidic alkali

Info

Publication number
SE9401769L
SE9401769L SE9401769A SE9401769A SE9401769L SE 9401769 L SE9401769 L SE 9401769L SE 9401769 A SE9401769 A SE 9401769A SE 9401769 A SE9401769 A SE 9401769A SE 9401769 L SE9401769 L SE 9401769L
Authority
SE
Sweden
Prior art keywords
liquor
digestion
impregnation
pulp
sulphidic
Prior art date
Application number
SE9401769A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9401769D0 (en
Inventor
Nils Mannbro
Original Assignee
Nils Mannbro
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 Nils Mannbro filed Critical Nils Mannbro
Priority to SE9401769A priority Critical patent/SE9401769L/en
Publication of SE9401769D0 publication Critical patent/SE9401769D0/en
Priority to PCT/SE1995/000573 priority patent/WO1995032331A1/en
Publication of SE9401769L publication Critical patent/SE9401769L/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
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
    • 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

Method of stepwise delignification of lignocellulose fiber material by digestion with sulphidic alkaline liquor comprising kraft cooking of wood chips with white liquor. White liquor is distributed during digestion. Ex-digestion liquor is displaced from digester pulp at low or no dilution by any brown stock pulp washing medium and piped to initial chip material impregnation stage. Hereby pulp yield and viscosity values are improved. These may be enhanced by polysulphide which stabilizes carbohydrates. Such polysulphide reaction is produced by in situ oxidation. Black liquor at reduction degree attained by impregnation is passed to the recovery plant while a portion of ex-digestion liquor at its original reduction is directly recycled together with impregnated material. Separately from extraction of ex-digestion liquor, liquor containing the washing medium is removed and passed to concentration and combustion steps which optionally are arranged after admixture to black liquor.
SE9401769A 1994-05-24 1994-05-24 Tile impregnation in pulp cooking with sulphidic alkali SE9401769L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9401769A SE9401769L (en) 1994-05-24 1994-05-24 Tile impregnation in pulp cooking with sulphidic alkali
PCT/SE1995/000573 WO1995032331A1 (en) 1994-05-24 1995-05-22 Sulphidic impregnation of chips for alkaline pulping

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9401769A SE9401769L (en) 1994-05-24 1994-05-24 Tile impregnation in pulp cooking with sulphidic alkali

Publications (2)

Publication Number Publication Date
SE9401769D0 SE9401769D0 (en) 1994-05-24
SE9401769L true SE9401769L (en) 1995-11-25

Family

ID=20394096

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9401769A SE9401769L (en) 1994-05-24 1994-05-24 Tile impregnation in pulp cooking with sulphidic alkali

Country Status (2)

Country Link
SE (1) SE9401769L (en)
WO (1) WO1995032331A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885414A (en) * 1997-08-18 1999-03-23 Kvaerner Pulping Ab Method of producing pulp with high alkali cooking in the last cooking stage
WO2000077295A1 (en) 1999-06-15 2000-12-21 Kawasaki Kasei Chemicals Ltd. Digestion method for pulp
WO2003002813A2 (en) * 2001-06-29 2003-01-09 Voith Paper Fiber Systems Gmbh & Co. Kg Method for delignifying lignocellulosic raw materials
DE10323376A1 (en) * 2003-05-21 2004-12-16 Voith Paper Fiber Systems Gmbh & Co. Kg Delignification procedure
FI120547B (en) * 2004-10-04 2009-11-30 Metso Paper Inc Alkaline cooking process and pulp making plant
FI122841B (en) * 2004-10-04 2012-07-31 Metso Paper Inc Method and apparatus for making cellulosic pulp
KR20110123184A (en) 2010-05-06 2011-11-14 바히아 스페셜티 셀룰로스 에스에이 Method and system for high alpha dissolving pulp production
CA2744250C (en) * 2010-05-04 2016-10-11 Bahia Specialty Cellulose Sa Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE381897C (en) * 1973-11-23 1977-05-12 Skogegarnas Ind Ab SET FOR BATCH ALKALINE MASS COOKING IN COMBINATION WITH CONTINUOUS ACID EQUALIZATION
US5053108A (en) * 1989-06-28 1991-10-01 Kamyr Ab High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips
US5213662A (en) * 1991-08-14 1993-05-25 Kamyr, Inc. Treatment of chips with high temperature black liquor to reduce black liquor viscosity

Also Published As

Publication number Publication date
SE9401769D0 (en) 1994-05-24
WO1995032331A1 (en) 1995-11-30

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