FI920832A0 - FOERFARANDE FOER BLEKNING AV CELLULOSA I ALIFATISKA MONOKARBOXYLSYROR. - Google Patents

FOERFARANDE FOER BLEKNING AV CELLULOSA I ALIFATISKA MONOKARBOXYLSYROR.

Info

Publication number
FI920832A0
FI920832A0 FI920832A FI920832A FI920832A0 FI 920832 A0 FI920832 A0 FI 920832A0 FI 920832 A FI920832 A FI 920832A FI 920832 A FI920832 A FI 920832A FI 920832 A0 FI920832 A0 FI 920832A0
Authority
FI
Finland
Prior art keywords
monokarboxylsyror
alifatiska
cellulosa
foerfarande foer
stage
Prior art date
Application number
FI920832A
Other languages
Finnish (fi)
Other versions
FI920832A (en
Inventor
Alex Berg
Wim Janssen
Stefan Balle
Rudolf Gustav Kunz
Wolfdieter Klein
Original Assignee
Acetocell Gmbh & Co Kg
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 Acetocell Gmbh & Co Kg filed Critical Acetocell Gmbh & Co Kg
Publication of FI920832A0 publication Critical patent/FI920832A0/en
Publication of FI920832A publication Critical patent/FI920832A/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
    • D21C3/003—Pulping cellulose-containing materials with organic 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
    • 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
    • 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
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • External Artificial Organs (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

In this two-stage process for bleaching pulps, the pulp is bleached in a first stage in aliphatic monocarboxylic acids at an elevated temperature and under an elevated pressure, with addition of nitric acid. After washing or extraction with water or with the bleaching solution, a treatment of the pulp with an ozone-containing gas is carried out in the second stage.
FI920832A 1991-03-08 1992-02-25 FOERFARANDE FOER BLEKNING AV CELLULOSA I ALIPHATIC MONOCARBOXYL SYROR FI920832A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4107356A DE4107356C1 (en) 1991-03-08 1991-03-08

Publications (2)

Publication Number Publication Date
FI920832A0 true FI920832A0 (en) 1992-02-25
FI920832A FI920832A (en) 1992-09-09

Family

ID=6426710

Family Applications (1)

Application Number Title Priority Date Filing Date
FI920832A FI920832A (en) 1991-03-08 1992-02-25 FOERFARANDE FOER BLEKNING AV CELLULOSA I ALIPHATIC MONOCARBOXYL SYROR

Country Status (6)

Country Link
EP (1) EP0503303B1 (en)
AT (1) ATE131886T1 (en)
CA (1) CA2062325A1 (en)
DE (2) DE4107356C1 (en)
FI (1) FI920832A (en)
NO (1) NO920829L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2391011A (en) * 2002-07-19 2004-01-28 Crosmill Ltd Bleaching cellulose suspensions

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2183643A (en) * 1936-05-05 1939-12-19 Manufacture of cellulose
GB579669A (en) * 1943-11-05 1946-08-12 Stanley Charles Bate Improvements in or relating to the production of cellulose
US3553076A (en) * 1968-01-22 1971-01-05 Weyerhaeuser Co Non-catalytic process for the production of cellulose from lignocellulosic materials using acetic acid
DE3118384C1 (en) * 1981-05-09 1982-11-11 Mannesmann AG, 4000 Düsseldorf Process for bleaching chemically produced pulp with ozone
DE3445132A1 (en) * 1984-12-11 1986-06-12 Nimz, Horst H., Prof.Dr., 2050 Hamburg Wood pulping with acetic acid
EP0325891A1 (en) * 1988-01-25 1989-08-02 Kunz Holding Gmbh & Co. Kg Process for obtaining bleached cellulose pulp

Also Published As

Publication number Publication date
NO920829D0 (en) 1992-03-03
ATE131886T1 (en) 1996-01-15
CA2062325A1 (en) 1992-09-09
FI920832A (en) 1992-09-09
DE59204715D1 (en) 1996-02-01
NO920829L (en) 1992-09-09
EP0503303A1 (en) 1992-09-16
DE4107356C1 (en) 1992-11-05
EP0503303B1 (en) 1995-12-20

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Legal Events

Date Code Title Description
FD Application lapsed