CA2121969C - Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals - Google Patents
Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicalsInfo
- Publication number
- CA2121969C CA2121969C CA002121969A CA2121969A CA2121969C CA 2121969 C CA2121969 C CA 2121969C CA 002121969 A CA002121969 A CA 002121969A CA 2121969 A CA2121969 A CA 2121969A CA 2121969 C CA2121969 C CA 2121969C
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- oxygen
- bleached
- caustic extraction
- oxygen containing
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K1/00—Damping wood
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
-
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/08—Pretreatment of the finely-divided materials before digesting with oxygen-generating 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
-
- 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
-
- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Paper (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002121969A CA2121969C (en) | 1994-04-22 | 1994-04-22 | Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals |
ZA952751A ZA952751B (en) | 1994-04-22 | 1995-04-04 | Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals |
NO951464A NO951464L (no) | 1994-04-22 | 1995-04-19 | Fremgangsmåte til behandling av sulfittmasse för bleking med oksygenholdige kjemikalier |
JP7123116A JPH0841791A (ja) | 1994-04-22 | 1995-04-24 | 酸素含有化学物質による漂白のための亜硫酸パルプの前処理方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002121969A CA2121969C (en) | 1994-04-22 | 1994-04-22 | Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2121969A1 CA2121969A1 (en) | 1995-10-23 |
CA2121969C true CA2121969C (en) | 1997-11-04 |
Family
ID=4153447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002121969A Expired - Fee Related CA2121969C (en) | 1994-04-22 | 1994-04-22 | Pre-treatment of sulfite pulp before bleaching with oxygen containing chemicals |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH0841791A (no) |
CA (1) | CA2121969C (no) |
NO (1) | NO951464L (no) |
ZA (1) | ZA952751B (no) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4641629B2 (ja) * | 2001-01-26 | 2011-03-02 | 日本製紙株式会社 | セルロース質繊維材料パルプの漂白方法 |
-
1994
- 1994-04-22 CA CA002121969A patent/CA2121969C/en not_active Expired - Fee Related
-
1995
- 1995-04-04 ZA ZA952751A patent/ZA952751B/xx unknown
- 1995-04-19 NO NO951464A patent/NO951464L/no unknown
- 1995-04-24 JP JP7123116A patent/JPH0841791A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
NO951464D0 (no) | 1995-04-19 |
CA2121969A1 (en) | 1995-10-23 |
ZA952751B (en) | 1995-12-21 |
NO951464L (no) | 1995-10-23 |
JPH0841791A (ja) | 1996-02-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |