NO920830L - PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES - Google Patents

PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES

Info

Publication number
NO920830L
NO920830L NO92920830A NO920830A NO920830L NO 920830 L NO920830 L NO 920830L NO 92920830 A NO92920830 A NO 92920830A NO 920830 A NO920830 A NO 920830A NO 920830 L NO920830 L NO 920830L
Authority
NO
Norway
Prior art keywords
delignification
cellulose
substances
procedure
acetic acid
Prior art date
Application number
NO92920830A
Other languages
Norwegian (no)
Other versions
NO920830D0 (en
Inventor
Horst Nimz
Alex Berg
Rudolf Gustav Kunz
Wim Janssen
Stefan Balle
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 NO920830D0 publication Critical patent/NO920830D0/en
Publication of NO920830L publication Critical patent/NO920830L/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
    • D21C9/1005—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
    • 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
    • D21C9/147—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)

Abstract

Ved denne totrinns fremgangsmåten for delignifisering av celluloseholdige råstoffer benyttes deligni- fisering med vandig eddiksyre ved en temperatur mellom 140 og 230'C under et trykk på fra 3 til 30 bar med påfølgende ekstraksjon eller vask. Den oppnådde eddlksyrefuktede kjemiske massen blir deretter behandlet med en ozonholdig gass.In this two-step process for delignification of cellulose-containing raw materials, delignification with aqueous acetic acid is used at a temperature between 140 and 230 ° C under a pressure of from 3 to 30 bar with subsequent extraction or washing. The acetic acid moistened chemical pulp obtained is then treated with an ozone-containing gas.

NO92920830A 1991-03-08 1992-03-03 PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES NO920830L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4107357A DE4107357C1 (en) 1991-03-08 1991-03-08

Publications (2)

Publication Number Publication Date
NO920830D0 NO920830D0 (en) 1992-03-03
NO920830L true NO920830L (en) 1992-09-09

Family

ID=6426711

Family Applications (1)

Application Number Title Priority Date Filing Date
NO92920830A NO920830L (en) 1991-03-08 1992-03-03 PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES

Country Status (5)

Country Link
EP (1) EP0503304A1 (en)
CA (1) CA2062475A1 (en)
DE (1) DE4107357C1 (en)
FI (1) FI920831L (en)
NO (1) NO920830L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4228171C2 (en) * 1992-08-25 1995-06-14 Kaemmerer Projekt Agentur Gmbh Process for the production of cellulose
US6302997B1 (en) * 1999-08-30 2001-10-16 North Carolina State University Process for producing a pulp suitable for papermaking from nonwood fibrous materials
DE19962411A1 (en) * 1999-12-22 2001-07-05 Natural Pulping Ag Recovering carboxylic acids from waste solutions in pulp production by adding an extraction agent to the waste solution

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE309551C (en) * 1916-01-14
AT83396B (en) * 1916-06-19 1921-03-25 Hermann Pauly Dr Process for the production of the so-called lignin-forming substances from cellulose-containing materials.
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
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
ES2041828T3 (en) * 1988-01-25 1993-12-01 Acetocell Gmbh & Co. Kg PROCEDURE FOR THE TREATMENT OF CELLULOSE MASS CONTAINING LIGNIN, WITH OZONE.

Also Published As

Publication number Publication date
FI920831A0 (en) 1992-02-25
CA2062475A1 (en) 1992-09-09
EP0503304A1 (en) 1992-09-16
FI920831A7 (en) 1992-09-09
DE4107357C1 (en) 1992-11-05
NO920830D0 (en) 1992-03-03
FI920831L (en) 1992-09-09

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