FI863193A0 - FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL. - Google Patents

FOERFARANDE FOER DELIGNIFIERING AV CELLULOSAMATERIAL.

Info

Publication number
FI863193A0
FI863193A0 FI863193A FI863193A FI863193A0 FI 863193 A0 FI863193 A0 FI 863193A0 FI 863193 A FI863193 A FI 863193A FI 863193 A FI863193 A FI 863193A FI 863193 A0 FI863193 A0 FI 863193A0
Authority
FI
Finland
Prior art keywords
cellulosamaterial
cellulosic materials
foerfarande foer
delignifiering
treated
Prior art date
Application number
FI863193A
Other languages
Finnish (fi)
Other versions
FI85725B (en
FI863193A (en
FI85725C (en
Inventor
Josef S Gratzl
Original Assignee
Interox Sa
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 Interox Sa filed Critical Interox Sa
Publication of FI863193A0 publication Critical patent/FI863193A0/en
Publication of FI863193A publication Critical patent/FI863193A/en
Publication of FI85725B publication Critical patent/FI85725B/en
Application granted granted Critical
Publication of FI85725C publication Critical patent/FI85725C/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
    • D21C3/22—Other features of pulping processes
    • D21C3/26—Multistage processes

Landscapes

  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Paper (AREA)
  • Dental Preparations (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • External Artificial Organs (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Cleaning Or Drying Semiconductors (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Detergent Compositions (AREA)

Abstract

1. Process for the delignification of cellulosic materials characterized in that in a first step the cellulosic materials are treated with an acid under regulated conditions to effect a decontamination of the cellulosic material of the metals which they contain, in a second step the cellulosic materials of the first step are treated with hydrogen peroxyde under alcaline conditions and in a third step the cellulosic materials of the second step are boiled in the presence of sulphite or sulphate.
FI863193A 1985-08-05 1986-08-05 Process for delignifying cellulose material FI85725C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76272485A 1985-08-05 1985-08-05
US76272485 1985-08-05

Publications (4)

Publication Number Publication Date
FI863193A0 true FI863193A0 (en) 1986-08-05
FI863193A FI863193A (en) 1987-02-06
FI85725B FI85725B (en) 1992-02-14
FI85725C FI85725C (en) 1992-05-25

Family

ID=25065878

Family Applications (1)

Application Number Title Priority Date Filing Date
FI863193A FI85725C (en) 1985-08-05 1986-08-05 Process for delignifying cellulose material

Country Status (14)

Country Link
EP (1) EP0213376B1 (en)
JP (1) JPH0742669B2 (en)
AT (1) ATE57401T1 (en)
AU (1) AU591508B2 (en)
BR (1) BR8603671A (en)
CA (1) CA1282911C (en)
DE (1) DE3674866D1 (en)
ES (1) ES2000831A6 (en)
FI (1) FI85725C (en)
IN (1) IN167959B (en)
NO (1) NO168375C (en)
NZ (1) NZ217001A (en)
PT (1) PT83117B (en)
YU (1) YU45352B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3674859D1 (en) * 1985-08-05 1990-11-15 Interox Sa METHOD FOR DELIGNIFYING CELLULOSE MATERIALS.
FI122654B (en) * 1997-12-08 2012-05-15 Ovivo Luxembourg Sarl Process for making paper cellulose pulp
CA2687581C (en) * 2007-05-23 2015-04-21 Alberta Research Council Inc. Method to remove hemicellulose from cellulosic fibres using a solution of ammonia and hydrogen peroxide

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE873649C (en) * 1944-08-25 1953-04-16 Degussa Process for the production of unbleached cellulose with a high white content
SE373896B (en) * 1972-07-05 1975-02-17 Mo Och Domsjoe Ab
SE380298B (en) * 1974-03-14 1975-11-03 Mo PROCEDURE FOR DELIGNIFICATION BY ACID-ALKALI TREATMENT OF LIGNOCELLUOSA-CONTAINING MATERIAL
US4486267A (en) * 1983-11-14 1984-12-04 Mead Corporation Chemithermomechanical pulping process employing separate alkali and sulfite treatments
DE3674859D1 (en) * 1985-08-05 1990-11-15 Interox Sa METHOD FOR DELIGNIFYING CELLULOSE MATERIALS.

Also Published As

Publication number Publication date
NO168375C (en) 1992-02-12
NO168375B (en) 1991-11-04
CA1282911C (en) 1991-04-16
FI85725B (en) 1992-02-14
AU591508B2 (en) 1989-12-07
EP0213376A1 (en) 1987-03-11
NO863132L (en) 1987-02-06
FI863193A (en) 1987-02-06
YU45352B (en) 1992-05-28
DE3674866D1 (en) 1990-11-15
JPS6297991A (en) 1987-05-07
NZ217001A (en) 1989-01-27
YU137086A (en) 1987-10-31
EP0213376B1 (en) 1990-10-10
PT83117A (en) 1986-09-01
JPH0742669B2 (en) 1995-05-10
ATE57401T1 (en) 1990-10-15
BR8603671A (en) 1987-03-10
PT83117B (en) 1988-10-14
NO863132D0 (en) 1986-08-04
IN167959B (en) 1991-01-12
FI85725C (en) 1992-05-25
ES2000831A6 (en) 1988-03-16
AU6054386A (en) 1987-02-12

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: INTEROX (SOCIETE ANONYME)