NO920830L - PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES - Google Patents
PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCESInfo
- 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
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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914107357 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) | FI920831A (en) |
NO (1) | NO920830L (en) |
Families Citing this family (3)
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)
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 |
EP0325890B1 (en) * | 1988-01-25 | 1993-06-09 | Acetocell GmbH & Co. KG | Process for treating lignin containing cellulose pulp with ozone |
EP0325891A1 (en) * | 1988-01-25 | 1989-08-02 | Kunz Holding Gmbh & Co. Kg | Process for obtaining bleached cellulose pulp |
-
1991
- 1991-03-08 DE DE19914107357 patent/DE4107357C1/de not_active Expired - Lifetime
-
1992
- 1992-02-14 EP EP92102470A patent/EP0503304A1/en not_active Withdrawn
- 1992-02-25 FI FI920831A patent/FI920831A/en not_active Application Discontinuation
- 1992-03-03 NO NO92920830A patent/NO920830L/en unknown
- 1992-03-06 CA CA 2062475 patent/CA2062475A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI920831A (en) | 1992-09-09 |
DE4107357C1 (en) | 1992-11-05 |
NO920830D0 (en) | 1992-03-03 |
FI920831A0 (en) | 1992-02-25 |
CA2062475A1 (en) | 1992-09-09 |
EP0503304A1 (en) | 1992-09-16 |
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