FI884267A0 - A method for treating pulps with ozone and a reactor for applying this method - Google Patents
A method for treating pulps with ozone and a reactor for applying this methodInfo
- Publication number
- FI884267A0 FI884267A0 FI884267A FI884267A FI884267A0 FI 884267 A0 FI884267 A0 FI 884267A0 FI 884267 A FI884267 A FI 884267A FI 884267 A FI884267 A FI 884267A FI 884267 A0 FI884267 A0 FI 884267A0
- Authority
- FI
- Finland
- Prior art keywords
- ozone
- carrier gas
- reactor
- applying
- moisture content
- 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
- D21C9/147—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)
- Fertilizers (AREA)
Abstract
Process for the ozone treatment of lignocellulosic material, especially of paper pulp, according to which the material is brought to the desired moisture content beforehand in order that the ozonation reaction may take place under optimum conditions, characterised in that the material brought to the desired moisture content is reduced to a sufficient state of division to ensure an interface of maximum value between the ozone-carrier gas and the fibrous solid and in that the said material is then subjected to ozonation by means of a carrier gas in which the ozone concentration is between 4 and 10% on a mass basis in relation to the said carrier gas. <IMAGE>
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8712890A FR2620744A1 (en) | 1987-09-17 | 1987-09-17 | PROCESS FOR THE OZONE TREATMENT OF LIGNO-CELLULOSIC MATERIALS, IN PARTICULAR PAPER PULP AND REACTOR FOR THE IMPLEMENTATION OF SAID METHOD |
FR8712890 | 1987-09-17 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI884267A0 true FI884267A0 (en) | 1988-09-16 |
FI884267A FI884267A (en) | 1989-03-18 |
FI93867B FI93867B (en) | 1995-02-28 |
FI93867C FI93867C (en) | 1995-06-12 |
Family
ID=9354988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI884267A FI93867C (en) | 1987-09-17 | 1988-09-16 | A method for treating pulps with ozone and a reactor for applying this method |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0308314B1 (en) |
JP (1) | JP2731822B2 (en) |
AT (1) | ATE82340T1 (en) |
BR (1) | BR8804806A (en) |
CA (1) | CA1314664C (en) |
DE (2) | DE308314T1 (en) |
ES (1) | ES2035339T3 (en) |
FI (1) | FI93867C (en) |
FR (1) | FR2620744A1 (en) |
NO (1) | NO174781C (en) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5472572A (en) * | 1990-10-26 | 1995-12-05 | Union Camp Patent Holding, Inc. | Reactor for bleaching high consistency pulp with ozone |
US5188708A (en) | 1989-02-15 | 1993-02-23 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification followed by ozone relignification |
US5181989A (en) * | 1990-10-26 | 1993-01-26 | Union Camp Patent Holdings, 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 |
FI89516B (en) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande Foer blekning av cellulosamassa med Otson |
AT395180B (en) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | METHOD FOR CRUSHING MATERIALS AND SYSTEM FOR IMPLEMENTING IT |
US5164044A (en) | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
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 |
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 |
EP0492040A1 (en) * | 1990-12-21 | 1992-07-01 | Kamyr, Inc. | Tumbling ozone reactor for paper pulp |
EP0492039A1 (en) * | 1990-12-27 | 1992-07-01 | Kamyr, Inc. | Pneumatic reactor ozone bleaching of paper pulp |
US5087326A (en) * | 1991-02-20 | 1992-02-11 | Union Camp Patent Holding, Inc. | Rotating pulp bleaching reactor having inner and outer shells and lifting means on the interior surface of the inner shell |
US5411633A (en) * | 1991-04-30 | 1995-05-02 | Kamyr, Inc. | Medium consistency pulp ozone bleaching |
ES2106848T5 (en) * | 1991-05-24 | 2001-09-01 | Union Camp Patent Holding | METHOD OF WHITENING WITH OZONE. |
FI925558A (en) * | 1992-04-22 | 1993-10-23 | Ahlstroem Oy | FOERFARANDE OCH ANORDNING FOER BLEKNING AV MASSA |
US5387317A (en) * | 1993-01-28 | 1995-02-07 | The Mead Corporation | Oxygen/ozone/peracetic aicd delignification and bleaching of cellulosic pulps |
US5810973A (en) * | 1993-09-21 | 1998-09-22 | Beloit Technologies, Inc. | Apparatus for producing small particles from high consistency wood pulp |
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 |
WO1996005365A1 (en) * | 1994-08-11 | 1996-02-22 | Beloit Technologies, Inc. | Means for gas-sealingly conveying shredded pulp |
US5944952A (en) * | 1995-07-26 | 1999-08-31 | Beloit Technologies, Inc. | Method for bleaching high consistency pulp with a gaseous bleaching reagent |
US6077396A (en) * | 1997-05-16 | 2000-06-20 | Lariviere; Christopher J. | Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent |
US6174409B1 (en) | 1997-09-19 | 2001-01-16 | American Air Liquide Inc. | Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process |
SE514416C2 (en) * | 1999-06-10 | 2001-02-19 | Valmet Fibertech Ab | Method and system for gas-tight feed of pulp to an ozone bleaching reactor |
FR2811320B1 (en) * | 2000-07-06 | 2002-08-23 | Adir | NOVEL ALPHA CRYSTALLINE FORM OF TERT-BUTYLAMINE SALT OF PERINDOPRIL, PREPARATION METHOD THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING THE SAME |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1591070A (en) * | 1925-02-27 | 1926-07-06 | Robert B Wolf | Bleaching apparatus |
US2013115A (en) * | 1931-09-21 | 1935-09-03 | Thorne Carl Busch | Process and apparatus for the refining of pulp |
US2466633A (en) * | 1948-05-26 | 1949-04-05 | James M Daily | Method of bleaching cellulosic pulp |
FR1441787A (en) * | 1965-04-30 | 1966-06-10 | Progil | Pulp bleaching process |
NO137651C (en) * | 1975-10-31 | 1978-03-29 | Myrens Verksted As | PROCEDURE AND APPARATUS FOR CONTINUOUS TREATMENT OF FINDEL FIBER MATERIAL OR CELLULOSIZED MASS WITH GAS WITHOUT COVER. |
JPS5319404A (en) * | 1976-04-19 | 1978-02-22 | Toyo Pulp Co Ltd | Process and apparatus for treating cellulose material |
CA1090510A (en) * | 1976-06-02 | 1980-12-02 | Arthur W. Kempf | Delignification and bleaching of a lignocellulosic pulp slurry with ozone |
JPS5536313A (en) * | 1978-08-30 | 1980-03-13 | Hokusan Kk | Production of mechanical pulp |
US4363697A (en) * | 1979-12-03 | 1982-12-14 | The Black Clawson Company | Method for medium consistency oxygen delignification of pulp |
FR2474550A1 (en) * | 1980-01-24 | 1981-07-31 | Scott Paper Co | Two stage pulp bleaching process - by ozone bleaching of acidified pulp at high consistency, diluting to lower consistency, and making alkaline for peroxy bleaching |
FR2609067B1 (en) * | 1986-12-31 | 1990-06-15 | Beghin Say Sa | PROCESS FOR THE OZONE TREATMENT OF A CELLULOSIC PASTE |
-
1987
- 1987-09-17 FR FR8712890A patent/FR2620744A1/en not_active Withdrawn
-
1988
- 1988-09-12 DE DE198888402296T patent/DE308314T1/en active Pending
- 1988-09-12 CA CA000577157A patent/CA1314664C/en not_active Expired - Fee Related
- 1988-09-12 EP EP88402296A patent/EP0308314B1/en not_active Expired - Lifetime
- 1988-09-12 DE DE8888402296T patent/DE3875893T2/en not_active Expired - Fee Related
- 1988-09-12 ES ES198888402296T patent/ES2035339T3/en not_active Expired - Lifetime
- 1988-09-12 AT AT88402296T patent/ATE82340T1/en not_active IP Right Cessation
- 1988-09-16 NO NO884128A patent/NO174781C/en not_active IP Right Cessation
- 1988-09-16 BR BR8804806A patent/BR8804806A/en not_active IP Right Cessation
- 1988-09-16 FI FI884267A patent/FI93867C/en not_active IP Right Cessation
- 1988-09-17 JP JP63233374A patent/JP2731822B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ES2035339T3 (en) | 1993-04-16 |
ATE82340T1 (en) | 1992-11-15 |
NO174781C (en) | 1994-07-06 |
NO174781B (en) | 1994-03-28 |
DE3875893D1 (en) | 1992-12-17 |
JP2731822B2 (en) | 1998-03-25 |
FR2620744A1 (en) | 1989-03-24 |
FI884267A (en) | 1989-03-18 |
DE3875893T2 (en) | 1993-03-18 |
FI93867B (en) | 1995-02-28 |
CA1314664C (en) | 1993-03-23 |
EP0308314A1 (en) | 1989-03-22 |
BR8804806A (en) | 1989-04-25 |
JPH0197290A (en) | 1989-04-14 |
FI93867C (en) | 1995-06-12 |
NO884128L (en) | 1989-03-20 |
DE308314T1 (en) | 1989-10-05 |
NO884128D0 (en) | 1988-09-16 |
EP0308314B1 (en) | 1992-11-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FI884267A0 (en) | A method for treating pulps with ozone and a reactor for applying this method | |
EP0415149A3 (en) | Process for bleaching and delignification of lignocellulosic materials | |
FR2552125B1 (en) | PROCESS FOR THE TREATMENT OF CELLULOSIC MATERIALS BY OXIDIZING AGENTS | |
DE69430255D1 (en) | TREATMENT OF INORGANIC PIGMENTS WITH CARBOXYMETHYLCELLULOSE COMPOUNDS | |
DE3672577D1 (en) | METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS. | |
ATE140283T1 (en) | METHOD FOR PRODUCING BLEACHED HIGH YIELD PAPER PULP | |
DE3674866D1 (en) | METHOD FOR DELIGNIFYING CELLULOSE MATERIALS. | |
DE3566916D1 (en) | Process for grading paper, and apparatus for the application of the process | |
DE3674859D1 (en) | METHOD FOR DELIGNIFYING CELLULOSE MATERIALS. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
MM | Patent lapsed |
Owner name: DEGREMONT |