NO920829L - PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS - Google Patents

PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS

Info

Publication number
NO920829L
NO920829L NO92920829A NO920829A NO920829L NO 920829 L NO920829 L NO 920829L NO 92920829 A NO92920829 A NO 92920829A NO 920829 A NO920829 A NO 920829A NO 920829 L NO920829 L NO 920829L
Authority
NO
Norway
Prior art keywords
alifatic
procedure
chemical mass
stage
acids
Prior art date
Application number
NO92920829A
Other languages
Norwegian (no)
Other versions
NO920829D0 (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 NO920829D0 publication Critical patent/NO920829D0/en
Publication of NO920829L publication Critical patent/NO920829L/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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • External Artificial Organs (AREA)
  • Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
  • Investigating Or Analysing Biological Materials (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.
NO92920829A 1991-03-08 1992-03-03 PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS NO920829L (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
NO920829D0 NO920829D0 (en) 1992-03-03
NO920829L true NO920829L (en) 1992-09-09

Family

ID=6426710

Family Applications (1)

Application Number Title Priority Date Filing Date
NO92920829A NO920829L (en) 1991-03-08 1992-03-03 PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS

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
EP0503303B1 (en) 1995-12-20
DE4107356C1 (en) 1992-11-05
FI920832A0 (en) 1992-02-25
EP0503303A1 (en) 1992-09-16
NO920829D0 (en) 1992-03-03
ATE131886T1 (en) 1996-01-15
CA2062325A1 (en) 1992-09-09
DE59204715D1 (en) 1996-02-01
FI920832A (en) 1992-09-09

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