CA2023916A1 - Delignification of lignocellulose-containing fiber - Google Patents

Delignification of lignocellulose-containing fiber

Info

Publication number
CA2023916A1
CA2023916A1 CA002023916A CA2023916A CA2023916A1 CA 2023916 A1 CA2023916 A1 CA 2023916A1 CA 002023916 A CA002023916 A CA 002023916A CA 2023916 A CA2023916 A CA 2023916A CA 2023916 A1 CA2023916 A1 CA 2023916A1
Authority
CA
Canada
Prior art keywords
pulp
stage
improvement
chlorine
oxygen
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
CA002023916A
Other languages
English (en)
French (fr)
Inventor
Augustine I Dalton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Products and Chemicals Inc
Original Assignee
Air Products and Chemicals 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
Application filed by Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Publication of CA2023916A1 publication Critical patent/CA2023916A1/en
Abandoned legal-status Critical Current

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
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
CA002023916A 1989-11-11 1990-08-23 Delignification of lignocellulose-containing fiber Abandoned CA2023916A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US438551 1989-11-11
US43855189A 1989-11-17 1989-11-17

Publications (1)

Publication Number Publication Date
CA2023916A1 true CA2023916A1 (en) 1991-05-12

Family

ID=23741064

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002023916A Abandoned CA2023916A1 (en) 1989-11-11 1990-08-23 Delignification of lignocellulose-containing fiber

Country Status (8)

Country Link
EP (1) EP0429767A1 (de)
JP (1) JPH03161586A (de)
BR (1) BR9004674A (de)
CA (1) CA2023916A1 (de)
FI (1) FI904662A7 (de)
MY (1) MY106117A (de)
NO (1) NO903893L (de)
ZA (1) ZA907008B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI925159A0 (fi) * 1992-11-13 1992-11-13 Ahlstroem Oy Foerfarande foer blekning av massa
US20090000751A1 (en) * 2007-06-29 2009-01-01 Caifang Yin Bleaching process with at least one extraction stage
SE547843C2 (en) * 2023-02-24 2025-12-09 Valmet Oy Method for recycling textile material comprising cellulose

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage
CA1251903A (en) * 1985-06-17 1989-04-04 Pulp And Paper Research Institute Of Canada Alkaline-peroxide-oxygen treatment of unbleached and chlorinated chemical pulps
JPS6416958A (en) * 1987-07-13 1989-01-20 Toshiba Corp Apparatus for monitoring condition of waste liquid

Also Published As

Publication number Publication date
BR9004674A (pt) 1991-09-10
FI904662A0 (fi) 1990-09-21
NO903893D0 (no) 1990-09-06
NO903893L (no) 1991-05-21
FI904662L (fi) 1991-05-18
EP0429767A1 (de) 1991-06-05
FI904662A7 (fi) 1991-05-18
JPH03161586A (ja) 1991-07-11
MY106117A (en) 1995-03-31
ZA907008B (en) 1992-05-27

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Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued
FZDE Discontinued

Effective date: 19950223