SE440372B - Forfarande for blekning av kemisk massa med ozon - Google Patents
Forfarande for blekning av kemisk massa med ozonInfo
- Publication number
- SE440372B SE440372B SE7807120A SE7807120A SE440372B SE 440372 B SE440372 B SE 440372B SE 7807120 A SE7807120 A SE 7807120A SE 7807120 A SE7807120 A SE 7807120A SE 440372 B SE440372 B SE 440372B
- Authority
- SE
- Sweden
- Prior art keywords
- ozone
- bleaching
- pulp
- exhaust gas
- bleaching step
- Prior art date
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims description 193
- 238000000034 method Methods 0.000 title claims description 43
- 239000000126 substance Substances 0.000 title claims description 7
- 238000004061 bleaching Methods 0.000 claims description 126
- 238000005406 washing Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 104
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000011282 treatment Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000000605 extraction Methods 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- 229920005610 lignin Polymers 0.000 description 4
- 238000004076 pulp bleaching Methods 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011121 hardwood Substances 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002782 muconic acid derivatives Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7668977A JPS5430902A (en) | 1977-06-27 | 1977-06-27 | Industrial multistage pulp bleaching method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7807120L SE7807120L (sv) | 1978-12-28 |
| SE440372B true SE440372B (sv) | 1985-07-29 |
Family
ID=13612417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7807120A SE440372B (sv) | 1977-06-27 | 1978-06-21 | Forfarande for blekning av kemisk massa med ozon |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS5430902A (fi) |
| CA (1) | CA1103409A (fi) |
| FI (1) | FI70610C (fi) |
| SE (1) | SE440372B (fi) |
Families Citing this family (18)
| 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 |
| US5188708A (en) * | 1989-02-15 | 1993-02-23 | Union Camp Patent Holding, Inc. | Process for high consistency oxygen delignification followed by ozone relignification |
| 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 |
| 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 |
| FI89516B (fi) * | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande foer blekning av cellulosamassa med otson |
| AT395180B (de) * | 1989-08-16 | 1992-10-12 | Andritz Ag Maschf | Verfahren zur zerkleinerung von materialien und anlage zu dessen durchfuehrung |
| AT395028B (de) | 1990-02-07 | 1992-08-25 | Chemiefaser Lenzing Ag | Verfahren zum chlorfreien bleichen von kunstfaserzellstoff |
| US5164043A (en) * | 1990-05-17 | 1992-11-17 | Union Camp Patent Holding, Inc. | Environmentally improved process for bleaching lignocellulosic materials with ozone |
| US5164044A (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 |
| NZ242792A (en) * | 1991-05-24 | 1993-12-23 | Union Camp Patent Holding | Two-stage pulp bleaching reactor: pulp mixed with ozone in first stage. |
| US5389201A (en) * | 1992-02-28 | 1995-02-14 | International Paper Company | Bleaching of kraft cellulosic pulp employing ozone and reduced consumption of chlorine containing bleaching agent |
| JP3121917B2 (ja) * | 1992-07-08 | 2001-01-09 | 住友重機械工業株式会社 | オゾンによるパルプ漂白方法 |
| 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 |
| US5944952A (en) * | 1995-07-26 | 1999-08-31 | Beloit Technologies, Inc. | Method for bleaching high consistency pulp with a gaseous bleaching reagent |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126302A (en) * | 1974-08-22 | 1976-03-04 | Hitachi Shipbuilding Eng Co | Sansoganjugasunyoru seruroosubutsushitsuno shorihoho |
| JPS526363A (en) * | 1975-07-04 | 1977-01-18 | Nikkan Ind | Pipe bender |
-
1977
- 1977-06-27 JP JP7668977A patent/JPS5430902A/ja active Pending
-
1978
- 1978-06-21 SE SE7807120A patent/SE440372B/sv not_active IP Right Cessation
- 1978-06-26 FI FI782032A patent/FI70610C/fi not_active IP Right Cessation
- 1978-06-26 CA CA306,198A patent/CA1103409A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1103409A (en) | 1981-06-23 |
| SE7807120L (sv) | 1978-12-28 |
| FI70610B (fi) | 1986-06-06 |
| FI70610C (fi) | 1986-09-24 |
| FI782032A (fi) | 1978-12-28 |
| JPS5430902A (en) | 1979-03-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| NAL | Patent in force |
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| NUG | Patent has lapsed |
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