FI924448A0 - FOERFARANDE FOER FOERBAETTRANDE AV SELEKTIVITETEN VID DELIGNIFIERING AV KEMISK PAPPERSMASSA - Google Patents

FOERFARANDE FOER FOERBAETTRANDE AV SELEKTIVITETEN VID DELIGNIFIERING AV KEMISK PAPPERSMASSA

Info

Publication number
FI924448A0
FI924448A0 FI924448A FI924448A FI924448A0 FI 924448 A0 FI924448 A0 FI 924448A0 FI 924448 A FI924448 A FI 924448A FI 924448 A FI924448 A FI 924448A FI 924448 A0 FI924448 A0 FI 924448A0
Authority
FI
Finland
Prior art keywords
selektiviteten
delignifiering
pappersmassa
kemisk
vid
Prior art date
Application number
FI924448A
Other languages
Finnish (fi)
Other versions
FI924448A (en
Inventor
Roy T Hill
Original Assignee
Interox America
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27118364&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI924448(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Interox America filed Critical Interox America
Publication of FI924448A0 publication Critical patent/FI924448A0/en
Publication of FI924448A publication Critical patent/FI924448A/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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
    • 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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • External Artificial Organs (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A process for improving the selectivity of delignification of a chemical paper pulp, in which the pulp is treated with an aqueous solution of an organic peroxy acid at 2 - 47 degrees C., followed by a water wash and a supplementary stage of alkaline extraction in the presence of hydrogen peroxide.
FI924448A 1991-10-04 1992-10-02 FOERFARANDE FOER FOERBAETTRANDE AV SELEKTIVITETEN VID DELIGNIFIERING AV KEMISK PAPPERSMASSA FI924448A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77085991A 1991-10-04 1991-10-04
US94283892A 1992-09-10 1992-09-10

Publications (2)

Publication Number Publication Date
FI924448A0 true FI924448A0 (en) 1992-10-02
FI924448A FI924448A (en) 1993-04-05

Family

ID=27118364

Family Applications (1)

Application Number Title Priority Date Filing Date
FI924448A FI924448A (en) 1991-10-04 1992-10-02 FOERFARANDE FOER FOERBAETTRANDE AV SELEKTIVITETEN VID DELIGNIFIERING AV KEMISK PAPPERSMASSA

Country Status (9)

Country Link
EP (2) EP0535741B1 (en)
JP (1) JPH05195467A (en)
AT (1) ATE168149T1 (en)
AU (1) AU660326B2 (en)
DE (1) DE69226143T2 (en)
ES (1) ES2120984T3 (en)
FI (1) FI924448A (en)
NZ (1) NZ244592A (en)
PL (1) PL171990B1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2269191A (en) * 1992-07-29 1994-02-02 Solvay Interox Ltd Method of treating aqueous process liquors
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
ATE146833T1 (en) * 1992-11-27 1997-01-15 Eka Chemicals Ab METHOD FOR DELIGRIFIING PULP CONTAINING LIGNOCELLULOSE
AU671337B2 (en) * 1992-11-27 1996-08-22 Eka Nobel Ab Process for bleaching of lignocellulose-containing pulp
DE19516151A1 (en) * 1995-05-03 1996-11-07 Sven Siegle Process for the production of a pulp from cellulosic material, the pulp itself and its use
ATE244752T1 (en) * 1996-03-04 2003-07-15 Procter & Gamble LAUNDRY PRETREATMENT METHODS AND BLEACH COMPOSITIONS

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1014536A (en) * 1910-05-24 1912-01-09 Minosaku Takahashi Vessel-closure.
FR1014536A (en) * 1940-04-01 1952-08-18 Du Pont Wood pulp bleaching improvements
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
DE3005947B1 (en) * 1980-02-16 1981-01-29 Degussa Process for bleaching pulp using organic peracid
US4793898A (en) * 1985-02-22 1988-12-27 Oy Keskuslaboratorio - Centrallaboratorium Ab Process for bleaching organic peroxyacid cooked material with an alkaline solution of hydrogen peroxide

Also Published As

Publication number Publication date
PL296122A1 (en) 1993-06-28
PL171990B1 (en) 1997-07-31
EP0535741A1 (en) 1993-04-07
DE69226143T2 (en) 1999-02-25
JPH05195467A (en) 1993-08-03
AU660326B2 (en) 1995-06-22
DE69226143D1 (en) 1998-08-13
AU2538292A (en) 1993-04-22
EP0844328A2 (en) 1998-05-27
FI924448A (en) 1993-04-05
ATE168149T1 (en) 1998-07-15
NZ244592A (en) 1994-02-25
EP0844328A3 (en) 1998-07-15
ES2120984T3 (en) 1998-11-16
EP0535741B1 (en) 1998-07-08

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Legal Events

Date Code Title Description
FD Application lapsed