DE59204715D1 - Verfahren zum Bleichen von Zellstoffen in aliphatischen Monocarbonsäuren - Google Patents
Verfahren zum Bleichen von Zellstoffen in aliphatischen MonocarbonsäurenInfo
- Publication number
- DE59204715D1 DE59204715D1 DE59204715T DE59204715T DE59204715D1 DE 59204715 D1 DE59204715 D1 DE 59204715D1 DE 59204715 T DE59204715 T DE 59204715T DE 59204715 T DE59204715 T DE 59204715T DE 59204715 D1 DE59204715 D1 DE 59204715D1
- Authority
- DE
- Germany
- Prior art keywords
- monocarboxylic acids
- aliphatic monocarboxylic
- bleaching
- stage
- pulps
- 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.)
- Expired - Fee Related
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)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4107356A DE4107356C1 (de) | 1991-03-08 | 1991-03-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE59204715D1 true DE59204715D1 (de) | 1996-02-01 |
Family
ID=6426710
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4107356A Expired - Lifetime DE4107356C1 (de) | 1991-03-08 | 1991-03-08 | |
DE59204715T Expired - Fee Related DE59204715D1 (de) | 1991-03-08 | 1992-02-14 | Verfahren zum Bleichen von Zellstoffen in aliphatischen Monocarbonsäuren |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4107356A Expired - Lifetime DE4107356C1 (de) | 1991-03-08 | 1991-03-08 |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0503303B1 (de) |
AT (1) | ATE131886T1 (de) |
CA (1) | CA2062325A1 (de) |
DE (2) | DE4107356C1 (de) |
FI (1) | FI920832A (de) |
NO (1) | NO920829L (de) |
Families Citing this family (1)
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)
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 (de) * | 1981-05-09 | 1982-11-11 | Mannesmann AG, 4000 Düsseldorf | Verfahren zum Bleichen von chemisch hergestelltem Zellstoff mit Ozon |
DE3445132A1 (de) * | 1984-12-11 | 1986-06-12 | Nimz, Horst H., Prof.Dr., 2050 Hamburg | Holzaufschluss mit essigsaeure |
EP0325891A1 (de) * | 1988-01-25 | 1989-08-02 | Kunz Holding Gmbh & Co. Kg | Verfahren zur Gewinnung von gebleichtem Zellstoff |
-
1991
- 1991-03-08 DE DE4107356A patent/DE4107356C1/de not_active Expired - Lifetime
-
1992
- 1992-02-14 AT AT92102469T patent/ATE131886T1/de not_active IP Right Cessation
- 1992-02-14 EP EP92102469A patent/EP0503303B1/de not_active Expired - Lifetime
- 1992-02-14 DE DE59204715T patent/DE59204715D1/de not_active Expired - Fee Related
- 1992-02-25 FI FI920832A patent/FI920832A/fi not_active Application Discontinuation
- 1992-03-03 NO NO92920829A patent/NO920829L/no unknown
- 1992-03-05 CA CA002062325A patent/CA2062325A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
NO920829D0 (no) | 1992-03-03 |
CA2062325A1 (en) | 1992-09-09 |
DE4107356C1 (de) | 1992-11-05 |
FI920832A0 (fi) | 1992-02-25 |
FI920832A (fi) | 1992-09-09 |
NO920829L (no) | 1992-09-09 |
ATE131886T1 (de) | 1996-01-15 |
EP0503303A1 (de) | 1992-09-16 |
EP0503303B1 (de) | 1995-12-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |