AT302012B - Verfahren zum Bleichen von trockenem, durch mechanische Zerfaserung erzeugten Zellstoffbrei - Google Patents
Verfahren zum Bleichen von trockenem, durch mechanische Zerfaserung erzeugten ZellstoffbreiInfo
- Publication number
- AT302012B AT302012B AT1065470A AT1065470A AT302012B AT 302012 B AT302012 B AT 302012B AT 1065470 A AT1065470 A AT 1065470A AT 1065470 A AT1065470 A AT 1065470A AT 302012 B AT302012 B AT 302012B
- Authority
- AT
- Austria
- Prior art keywords
- dry pulp
- pulp produced
- mechanical defibration
- bleaching
- bleaching dry
- 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
- D21C9/1073—Bleaching ; Apparatus therefor with O3
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA68520 | 1969-11-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT302012B true AT302012B (de) | 1972-09-25 |
Family
ID=4085994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT1065470A AT302012B (de) | 1969-11-27 | 1970-11-26 | Verfahren zum Bleichen von trockenem, durch mechanische Zerfaserung erzeugten Zellstoffbrei |
Country Status (9)
Country | Link |
---|---|
US (1) | US3663357A (de) |
AT (1) | AT302012B (de) |
CA (1) | CA902861A (de) |
DE (1) | DE2058232C3 (de) |
FI (1) | FI50552C (de) |
FR (1) | FR2056606A5 (de) |
GB (1) | GB1274615A (de) |
NO (1) | NO127410B (de) |
SE (1) | SE354492B (de) |
Families Citing this family (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7208092A (de) * | 1972-06-14 | 1973-12-18 | ||
FR2255418B1 (de) * | 1973-12-21 | 1976-05-07 | Europeen Cellulose | |
US4080249A (en) | 1976-06-02 | 1978-03-21 | International Paper Company | Delignification and bleaching of a lignocellulosic pulp slurry with ozone |
US4216054A (en) | 1977-09-26 | 1980-08-05 | Weyerhaeuser Company | Low-consistency ozone delignification |
US4410397A (en) * | 1978-04-07 | 1983-10-18 | International Paper Company | Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives |
US4372812A (en) * | 1978-04-07 | 1983-02-08 | International Paper Company | Chlorine free process for bleaching lignocellulosic pulp |
TR22594A (tr) * | 1987-04-07 | 1987-12-15 | Nur Emaye San Ve Tic Tic A S | Soba borusu uzatma aparati |
US5181989A (en) * | 1990-10-26 | 1993-01-26 | Union Camp Patent Holdings, Inc. | Reactor for bleaching high consistency pulp with ozone |
US5472572A (en) * | 1990-10-26 | 1995-12-05 | Union Camp Patent Holding, Inc. | Reactor for bleaching high consistency pulp with ozone |
US5409570A (en) * | 1989-02-15 | 1995-04-25 | Union Camp Patent Holding, Inc. | Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone |
US5211811A (en) * | 1989-02-15 | 1993-05-18 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification of alkaline treated pulp followed by ozone delignification |
US5188708A (en) * | 1989-02-15 | 1993-02-23 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification followed by ozone relignification |
AT393701B (de) * | 1989-12-22 | 1991-12-10 | Schmidding Wilh Gmbh & Co | Verfahren zum bleichen von cellulosehaeltigen materialien sowie anlage zur durchfuehrung des verfahrens |
US5164043A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
US5441603A (en) * | 1990-05-17 | 1995-08-15 | Union Camp Patent Holding, Inc. | Method for chelation of pulp prior to ozone delignification |
US5164044A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
US5520783A (en) * | 1990-10-26 | 1996-05-28 | Union Camp Patent Holding, Inc. | Apparatus for bleaching high consistency pulp with ozone |
US5174861A (en) * | 1990-10-26 | 1992-12-29 | Union Camp Patent Holdings, Inc. | Method of bleaching high consistency pulp with ozone |
SE468355B (sv) * | 1991-04-30 | 1992-12-21 | Eka Nobel Ab | Blekning av kemisk massa genom behandling med komplexbildare och ozon |
NZ242792A (en) * | 1991-05-24 | 1993-12-23 | Union Camp Patent Holding | Two-stage pulp bleaching reactor: pulp mixed with ozone in first stage. |
US6231718B1 (en) | 1992-02-28 | 2001-05-15 | International Paper Company | Two phase ozone and oxygen pulp treatment |
GB9206415D0 (en) * | 1992-03-24 | 1992-05-06 | Albright & Wilson | Stabilisation of bleach liquors |
US5411635A (en) * | 1993-03-22 | 1995-05-02 | The Research Foundation Of State University Of New York | Ozone/peroxymonosulfate process for delignifying a lignocellulosic material |
ES2111298T3 (es) * | 1993-04-06 | 1998-03-01 | Air Liquide | Blanqueo de pasta reciclada con ozono y peroxido de hidrogeno. |
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 |
US5554259A (en) * | 1993-10-01 | 1996-09-10 | Union Camp Patent Holdings, Inc. | Reduction of salt scale precipitation by control of process stream Ph and salt concentration |
JPH108092A (ja) * | 1996-06-21 | 1998-01-13 | Mitsubishi Paper Mills Ltd | 過酸化物漂白用安定化剤及びそれを用いた繊維系物質の漂白方法 |
FR2801327B1 (fr) * | 1999-11-18 | 2002-07-12 | Papeteries Matussiere Forest | Procede de desencrage, de decoloration, de desinfection et de blanchiment de papiers de recuperation |
DE102009046797A1 (de) * | 2009-11-18 | 2011-05-19 | Voith Patent Gmbh | Bleiche |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2838459A (en) * | 1955-02-01 | 1958-06-10 | Pennsalt Chemicals Corp | Stabilization of solutions containing peroxygen compounds |
US2859087A (en) * | 1955-03-28 | 1958-11-04 | Du Pont | Process for bleaching webs of fibrous cellulose material with hydrogen peroxide vapor containing water vapor |
FR1441787A (fr) * | 1965-04-30 | 1966-06-10 | Progil | Procédé de blanchiment des pâtes à papier |
US3492199A (en) * | 1966-10-04 | 1970-01-27 | Fmc Corp | Bleaching fluffed mechanical wood pulp with hydrogen peroxide |
-
1969
- 1969-11-27 CA CA902861A patent/CA902861A/en not_active Expired
-
1970
- 1970-03-18 US US20824A patent/US3663357A/en not_active Expired - Lifetime
- 1970-06-16 NO NO02322/70A patent/NO127410B/no unknown
- 1970-06-17 GB GB29401/70A patent/GB1274615A/en not_active Expired
- 1970-06-26 FI FI701810A patent/FI50552C/fi active
- 1970-07-03 SE SE09278/70A patent/SE354492B/xx unknown
- 1970-08-05 FR FR7028861A patent/FR2056606A5/fr not_active Expired
- 1970-11-26 AT AT1065470A patent/AT302012B/de not_active IP Right Cessation
- 1970-11-26 DE DE2058232A patent/DE2058232C3/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA902861A (en) | 1972-06-20 |
FR2056606A5 (de) | 1971-05-14 |
DE2058232C3 (de) | 1974-10-24 |
SE354492B (de) | 1973-03-12 |
DE2058232A1 (de) | 1971-06-09 |
US3663357A (en) | 1972-05-16 |
NO127410B (de) | 1973-06-18 |
DE2058232B2 (de) | 1974-03-14 |
GB1274615A (en) | 1972-05-17 |
FI50552B (de) | 1975-12-31 |
FI50552C (fi) | 1976-04-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ELJ | Ceased due to non-payment of the annual fee |