FI921962A0 - Foerfarande foer blekning av cellulosahaltiga material. - Google Patents
Foerfarande foer blekning av cellulosahaltiga material.Info
- Publication number
- FI921962A0 FI921962A0 FI921962A FI921962A FI921962A0 FI 921962 A0 FI921962 A0 FI 921962A0 FI 921962 A FI921962 A FI 921962A FI 921962 A FI921962 A FI 921962A FI 921962 A0 FI921962 A0 FI 921962A0
- Authority
- FI
- Finland
- Prior art keywords
- cellulosahaltiga
- foerfarande foer
- blekning
- foer blekning
- foerfarande
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
-
- 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
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT91891A AT395445B (de) | 1991-05-02 | 1991-05-02 | Verfahren zum bleichen von cellulosehaeltigem material |
Publications (2)
Publication Number | Publication Date |
---|---|
FI921962A0 true FI921962A0 (fi) | 1992-04-30 |
FI921962A FI921962A (fi) | 1992-11-03 |
Family
ID=3502826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI921962A FI921962A (fi) | 1991-05-02 | 1992-04-30 | Foerfarande foer blekning av cellulosahaltiga material |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0512977B1 (fi) |
AT (1) | AT395445B (fi) |
CA (1) | CA2067844A1 (fi) |
DE (1) | DE59207155D1 (fi) |
ES (1) | ES2094337T3 (fi) |
FI (1) | FI921962A (fi) |
RU (1) | RU2096547C1 (fi) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5520783A (en) * | 1990-10-26 | 1996-05-28 | Union Camp Patent Holding, Inc. | Apparatus for bleaching high consistency pulp with ozone |
US5403441A (en) * | 1992-11-13 | 1995-04-04 | Union Camp Patent Holding, Inc. | Method for controlling an ozone bleaching process |
US5364505A (en) * | 1992-12-07 | 1994-11-15 | Kamyr, Inc. | Pressurized ozone pulp delignification reactor and a compressor for supplying ozone to the reactor |
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 |
US5736004A (en) * | 1995-03-03 | 1998-04-07 | Union Camp Patent Holding, Inc. | Control scheme for rapid pulp delignification and bleaching |
US5672247A (en) * | 1995-03-03 | 1997-09-30 | Union Camp Patent Holding, Inc. | Control scheme for rapid pulp delignification and bleaching |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4140608A (en) * | 1977-08-22 | 1979-02-20 | Vaseen Vesper A | Converting oxygen to ozone using a liquid dielectric containing dissolved oxygen |
FI89516B (fi) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande foer blekning av cellulosamassa med otson |
AT393701B (de) * | 1989-12-22 | 1991-12-10 | Schmidding Wilh Gmbh & Co | Verfahren zum bleichen von cellulosehaeltigen materialien sowie anlage zur durchfuehrung des verfahrens |
AT394707B (de) * | 1990-02-14 | 1992-06-10 | Schmidding Wilh Gmbh & Co | Verfahren und vorrichtung zur herstellung von ozonhaeltigen loesungen und gasen |
-
1991
- 1991-05-02 AT AT91891A patent/AT395445B/de not_active IP Right Cessation
-
1992
- 1992-04-28 ES ES92890101T patent/ES2094337T3/es not_active Expired - Lifetime
- 1992-04-28 EP EP19920890101 patent/EP0512977B1/de not_active Expired - Lifetime
- 1992-04-28 DE DE59207155T patent/DE59207155D1/de not_active Expired - Fee Related
- 1992-04-30 RU SU5011795 patent/RU2096547C1/ru active
- 1992-04-30 FI FI921962A patent/FI921962A/fi unknown
- 1992-05-01 CA CA 2067844 patent/CA2067844A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI921962A (fi) | 1992-11-03 |
RU2096547C1 (ru) | 1997-11-20 |
DE59207155D1 (de) | 1996-10-24 |
EP0512977B1 (de) | 1996-09-18 |
CA2067844A1 (en) | 1992-11-03 |
ES2094337T3 (es) | 1997-01-16 |
AT395445B (de) | 1992-12-28 |
ATA91891A (de) | 1992-05-15 |
EP0512977A1 (de) | 1992-11-11 |
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