BR8600637A - Processo para obtencao de polpa de lignocelulose de grande brilho e polpa assim obtida - Google Patents
Processo para obtencao de polpa de lignocelulose de grande brilho e polpa assim obtidaInfo
- Publication number
- BR8600637A BR8600637A BR8600637A BR8600637A BR8600637A BR 8600637 A BR8600637 A BR 8600637A BR 8600637 A BR8600637 A BR 8600637A BR 8600637 A BR8600637 A BR 8600637A BR 8600637 A BR8600637 A BR 8600637A
- Authority
- BR
- Brazil
- Prior art keywords
- pulp
- stages
- bleaching
- stage
- peroxide
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Joints Allowing Movement (AREA)
- Springs (AREA)
- Liquid Crystal Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Electron Beam Exposure (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70200085A | 1985-02-15 | 1985-02-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
BR8600637A true BR8600637A (pt) | 1986-11-04 |
Family
ID=24819495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR8600637A BR8600637A (pt) | 1985-02-15 | 1986-02-14 | Processo para obtencao de polpa de lignocelulose de grande brilho e polpa assim obtida |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0191756B1 (ja) |
JP (1) | JPS61245392A (ja) |
AT (1) | ATE39714T1 (ja) |
BR (1) | BR8600637A (ja) |
DE (1) | DE3661641D1 (ja) |
FI (1) | FI85729C (ja) |
NO (1) | NO166244C (ja) |
SE (1) | SE8600615L (ja) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE455203B (sv) * | 1986-10-20 | 1988-06-27 | Eka Nobel Ab | Forfarande for styrning av peroxidblekning av massa |
FR2622221A1 (fr) * | 1987-10-22 | 1989-04-28 | Atochem | Procede de blanchiment de pates |
FR2639371B1 (fr) * | 1988-11-24 | 1995-04-14 | Atochem | Procede de blanchiment de pates desencrees |
CA1340348C (en) * | 1989-03-23 | 1999-01-26 | Michel Barbe | Bleaching process for the production of high bright pulps |
JPH076148B2 (ja) * | 1989-06-27 | 1995-01-30 | 新王子製紙株式会社 | リグノセルロース物質の漂白方法 |
BE1004630A3 (fr) * | 1990-10-17 | 1992-12-22 | Interox Internat Sa | Procede pour la preservation des caracteristiques de resistance mecanique des pates a papier chimiques. |
GB9212926D0 (en) * | 1992-06-18 | 1992-07-29 | Morton Int Inc | Method of bleaching paper pulp |
US5464501A (en) * | 1993-04-06 | 1995-11-07 | Societe Anonyme Pour L'etude Et L'exploitation L'air Liquide, Des Procedes Georges Claude | Bleaching recycled pulp with a reductive-oxidative sequence |
IT1296947B1 (it) * | 1997-12-10 | 1999-08-03 | Donato Fausto De | Composizione per sbiancare la pasta di legno e relativo procedimento |
DE60326113D1 (de) * | 2002-11-05 | 2009-03-26 | Rohm & Haas | Verfahren zum Bleichen von mechanischer Pulpe |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1820502A (en) * | 1928-06-30 | 1931-08-25 | Champion Fibre Company | Bleaching cellulose pulp |
US2290601A (en) * | 1940-02-16 | 1942-07-21 | Du Pont | Bleaching of ground wood pulp with preliminary bisulphite treatment |
US2862784A (en) * | 1955-03-04 | 1958-12-02 | Virginia Smelting Company | Oxidative-reductive multi-stage bleaching of ground wood pulp |
JPS5679798A (en) * | 1979-12-03 | 1981-06-30 | Mitsubishi Gas Chemical Co | Production of bleaching machine pulp |
JPS575992A (en) * | 1980-06-04 | 1982-01-12 | Mitsubishi Gas Chemical Co | Bleaching of high yield pulp by peroxide |
CA1249402A (en) * | 1984-12-21 | 1989-01-31 | Pulp And Paper Research Institute Of Canada | Multistage brightening of high yield and ultra high- yield wood pulps |
-
1986
- 1986-02-12 DE DE8686890030T patent/DE3661641D1/de not_active Expired
- 1986-02-12 EP EP86890030A patent/EP0191756B1/en not_active Expired
- 1986-02-12 SE SE8600615A patent/SE8600615L/ unknown
- 1986-02-12 AT AT86890030T patent/ATE39714T1/de not_active IP Right Cessation
- 1986-02-14 FI FI860688A patent/FI85729C/fi not_active IP Right Cessation
- 1986-02-14 NO NO860546A patent/NO166244C/no unknown
- 1986-02-14 JP JP61030582A patent/JPS61245392A/ja active Pending
- 1986-02-14 BR BR8600637A patent/BR8600637A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE8600615L (sv) | 1986-08-16 |
NO166244C (no) | 1991-06-19 |
FI860688A0 (fi) | 1986-02-14 |
ATE39714T1 (de) | 1989-01-15 |
FI860688A (fi) | 1986-08-16 |
NO860546L (no) | 1986-08-18 |
EP0191756A1 (en) | 1986-08-20 |
FI85729B (fi) | 1992-02-14 |
EP0191756B1 (en) | 1989-01-04 |
JPS61245392A (ja) | 1986-10-31 |
SE8600615D0 (sv) | 1986-02-12 |
FI85729C (fi) | 1992-05-25 |
DE3661641D1 (en) | 1989-02-09 |
NO166244B (no) | 1991-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 14/02/2001 |