ATE168149T1 - METHOD FOR IMPROVING SELECTIVITY IN THE DELIGNIFIATION OF CHEMICAL PULP - Google Patents

METHOD FOR IMPROVING SELECTIVITY IN THE DELIGNIFIATION OF CHEMICAL PULP

Info

Publication number
ATE168149T1
ATE168149T1 AT92202952T AT92202952T ATE168149T1 AT E168149 T1 ATE168149 T1 AT E168149T1 AT 92202952 T AT92202952 T AT 92202952T AT 92202952 T AT92202952 T AT 92202952T AT E168149 T1 ATE168149 T1 AT E168149T1
Authority
AT
Austria
Prior art keywords
delignifiation
chemical pulp
improving selectivity
selectivity
improving
Prior art date
Application number
AT92202952T
Other languages
German (de)
Inventor
Roy T Hill
Original Assignee
Solvay Interox Inc
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=ATE168149(T1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Solvay Interox Inc filed Critical Solvay Interox Inc
Application granted granted Critical
Publication of ATE168149T1 publication Critical patent/ATE168149T1/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • External Artificial Organs (AREA)
  • Preliminary Treatment Of Fibers (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.
AT92202952T 1991-10-04 1992-09-25 METHOD FOR IMPROVING SELECTIVITY IN THE DELIGNIFIATION OF CHEMICAL PULP ATE168149T1 (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 (1)

Publication Number Publication Date
ATE168149T1 true ATE168149T1 (en) 1998-07-15

Family

ID=27118364

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92202952T ATE168149T1 (en) 1991-10-04 1992-09-25 METHOD FOR IMPROVING SELECTIVITY IN THE DELIGNIFIATION OF CHEMICAL PULP

Country Status (9)

Country Link
EP (2) EP0844328A3 (en)
JP (1) JPH05195467A (en)
AT (1) ATE168149T1 (en)
AU (1) AU660326B2 (en)
DE (1) DE69226143T2 (en)
ES (1) ES2120984T3 (en)
FI (1) FI924448A7 (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
CZ285246B6 (en) * 1992-11-27 1999-06-16 Eka Nobel Ab Bleaching process of pulp containing ligno-cellulose by making use of hydrogen peroxide
DE69306974T3 (en) * 1992-11-27 2004-01-08 Eka Chemicals Ab METHOD FOR THE DELIGRIFICATION OF LIGNOCELLULOSE-CONTAINING PULP
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
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
ES2202424T3 (en) * 1996-03-04 2004-04-01 THE PROCTER & GAMBLE COMPANY PROCESS OF TREATMENT OF GARMENTS BEFORE WASHING AND WHITENING 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
EP0844328A2 (en) 1998-05-27
FI924448L (en) 1993-04-05
NZ244592A (en) 1994-02-25
ES2120984T3 (en) 1998-11-16
AU660326B2 (en) 1995-06-22
EP0535741A1 (en) 1993-04-07
EP0844328A3 (en) 1998-07-15
DE69226143D1 (en) 1998-08-13
AU2538292A (en) 1993-04-22
FI924448A0 (en) 1992-10-02
PL171990B1 (en) 1997-07-31
FI924448A7 (en) 1993-04-05
JPH05195467A (en) 1993-08-03
DE69226143T2 (en) 1999-02-25
PL296122A1 (en) 1993-06-28
EP0535741B1 (en) 1998-07-08

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties