AU595842B2 - Pulp bleaching - Google Patents
Pulp bleaching Download PDFInfo
- Publication number
- AU595842B2 AU595842B2 AU64671/86A AU6467186A AU595842B2 AU 595842 B2 AU595842 B2 AU 595842B2 AU 64671/86 A AU64671/86 A AU 64671/86A AU 6467186 A AU6467186 A AU 6467186A AU 595842 B2 AU595842 B2 AU 595842B2
- Authority
- AU
- Australia
- Prior art keywords
- oxygen
- slurry
- pulp
- conduit
- stream
- 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.)
- Ceased
Links
- 238000004076 pulp bleaching Methods 0.000 title description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 141
- 239000001301 oxygen Substances 0.000 claims description 141
- 229910052760 oxygen Inorganic materials 0.000 claims description 141
- 239000002002 slurry Substances 0.000 claims description 84
- 239000013055 pulp slurry Substances 0.000 claims description 52
- 238000000034 method Methods 0.000 claims description 42
- 239000007789 gas Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 28
- 238000004061 bleaching Methods 0.000 claims description 21
- 229920002678 cellulose Polymers 0.000 claims description 19
- 239000001913 cellulose Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 15
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 9
- 229910001882 dioxygen Inorganic materials 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 239000007844 bleaching agent Substances 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims 2
- 239000007924 injection Substances 0.000 claims 2
- 230000008569 process Effects 0.000 description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000000835 fiber Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 241000239290 Araneae Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 229910001026 inconel Inorganic materials 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012255 powdered metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/232—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using flow-mixing means for introducing the gases, e.g. baffles
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
- B01F23/237612—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
- B01F25/3133—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit characterised by the specific design of the injector
- B01F25/31331—Perforated, multi-opening, with a plurality of holes
- B01F25/313311—Porous injectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
- B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
- B01F25/31421—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction the conduit being porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4335—Mixers with a converging-diverging cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/40—Static mixers
- B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
- B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
- B01F25/433—Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
- B01F25/4337—Mixers with a diverging-converging cross-section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/834—Mixing in several steps, e.g. successive steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/715—Feeding the components in several steps, e.g. successive steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F2025/91—Direction of flow or arrangement of feed and discharge openings
- B01F2025/919—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings
- B01F2025/9191—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component
- B01F2025/91911—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component with feed openings in the center of the main flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F2025/91—Direction of flow or arrangement of feed and discharge openings
- B01F2025/919—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings
- B01F2025/9191—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component
- B01F2025/91912—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component with feed openings at the circumference of the main flow
- B01F2025/919121—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component with feed openings at the circumference of the main flow with feed openings around the complete circumference of the main flow, e.g. being a perforated or porous part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F2025/91—Direction of flow or arrangement of feed and discharge openings
- B01F2025/919—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings
- B01F2025/9191—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component
- B01F2025/919125—Direction of flow or arrangement of feed and discharge openings characterised by the disposition of the feed and discharge openings characterised by the arrangement of the feed openings for one or more flows, e.g. for the mainflow and the flow of an additional component with feed openings in the center and at the circumference of the main flow
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US79828685A | 1985-11-15 | 1985-11-15 | |
| US798286 | 1985-11-15 | ||
| CA000507000A CA1300320C (en) | 1985-11-15 | 1986-04-18 | Pulp bleaching |
| CA507000 | 1986-04-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU6467186A AU6467186A (en) | 1987-05-21 |
| AU595842B2 true AU595842B2 (en) | 1990-04-12 |
Family
ID=25670962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU64671/86A Ceased AU595842B2 (en) | 1985-11-15 | 1986-11-03 | Pulp bleaching |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0226495B1 (pt) |
| AU (1) | AU595842B2 (pt) |
| BR (1) | BR8605636A (pt) |
| DE (1) | DE3672580D1 (pt) |
| NZ (1) | NZ218294A (pt) |
| PT (1) | PT83745B (pt) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU613952B2 (en) * | 1987-06-08 | 1991-08-15 | Canadian Liquid Air Ltd. | Method of bleaching or delignification of cellulose pulp with oxygen |
| WO2020072845A1 (en) * | 2018-10-05 | 2020-04-09 | University Of Baltimore | Systems, methods and apparatus for utilizing a resuspension tank |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2617736A1 (fr) * | 1987-07-08 | 1989-01-13 | Sampson Cat | Dispositif de production d'emulsion, en vue du nettoyage et de la desinfection |
| RU2103433C1 (ru) * | 1995-01-16 | 1998-01-27 | Грудинин Владимир Павлович | Способ обработки волокнистой массы химическим реагентом и установка для его осуществления |
| NO962328L (no) * | 1996-06-05 | 1997-12-08 | Aga Ab | Fremgangsmåte og anordning for innföring av gass i en væske |
| DE19849628A1 (de) * | 1998-10-28 | 2000-05-04 | Margret Spiegel | Verfahren und Anordnung zum Einbringen von Gas in eine Flüssigkeit |
| EP1319435A3 (de) * | 2001-12-12 | 2004-10-06 | Collectplan GmbH | Method and apparatus for introducing a first medium in a second medium |
| DE102004059934A1 (de) * | 2004-12-09 | 2006-06-22 | Würdig, Uwe, Dipl.-Ing. | Einrichtung zur Anreicherung flüssiger Medien mit Gas |
| SE528449C2 (sv) * | 2005-09-28 | 2006-11-14 | Kvaerner Pulping Tech | Apparat för inblandning av ånga till ett flöde av cellulosamassa |
| JP5006413B2 (ja) | 2007-03-15 | 2012-08-22 | ダウ グローバル テクノロジーズ エルエルシー | 連続流反応器用ミキサー |
| US7891861B2 (en) * | 2007-09-20 | 2011-02-22 | Fujifilm Corporation | Mixing method and mixer for mixing polymer dope, and solution casting process and apparatus |
| KR101351302B1 (ko) * | 2012-10-23 | 2014-01-15 | 주식회사 디섹 | 선박의 밸러스트수 처리시스템 |
| WO2017217402A1 (ja) * | 2016-06-15 | 2017-12-21 | 聡 安斎 | 養殖用または排水処理用超微細気泡発生装置 |
| SE545007C2 (en) * | 2021-01-18 | 2023-02-28 | Valmet Oy | Mixing device and method for mixing a fluid into a fiber pulp |
| CN115448440B (zh) * | 2022-07-25 | 2023-10-24 | 中石化宁波工程有限公司 | 一种分形氧化装置 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006852A (en) * | 1977-10-12 | 1979-05-10 | Airco Inc | Delignification of wood pulp |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2968589A (en) * | 1958-03-17 | 1961-01-17 | Kimberly Clark Co | Continuous pulp bleaching method |
| US3545731A (en) * | 1966-11-08 | 1970-12-08 | Gen Dynamics Corp | Apparatus for producing bubbles of very small,microscopic size |
| DE2046254A1 (pt) * | 1969-09-18 | 1971-04-01 | Atomic Energy Of Canada Ltd | |
| US3928199A (en) * | 1971-09-20 | 1975-12-23 | Airco Inc | Gas absorption system and method |
| US4030969A (en) * | 1972-06-13 | 1977-06-21 | Defibrator Ab | Method of dispersing a bleaching agent into a stream of fibrous cellulosic pulp material in a throttling nozzle |
| DE2241673C2 (de) * | 1972-09-01 | 1982-03-04 | Vsesojuznyj naučno-issledovatel'skij institut celljulozno-bumažnoj promyšlennosti, Leningrad | Anlage zur Bearbeitung von Suspensionenvon Faserstoffen |
| SE387671B (sv) * | 1973-04-27 | 1976-09-13 | Mo Och Domsjoe Ab | Anordning for blekning av kompakt, icke fluffat vetskehaltigt lignocellulosamaterial med gasformiga blekmedel, foretredesvis syrgas |
| US3892659A (en) * | 1973-05-04 | 1975-07-01 | Airco Inc | Multiple cycle process for wastewater purification |
| US3951733A (en) * | 1974-11-06 | 1976-04-20 | International Paper Company | Delignification and bleaching of wood pulp with oxygen |
| JPS54127064A (en) * | 1978-03-06 | 1979-10-02 | Komax Systems Inc | Charging instrument of stationary mixer |
| US4259150A (en) * | 1978-12-18 | 1981-03-31 | Kamyr Inc. | Plural stage mixing and thickening oxygen bleaching process |
| GB2072027B (en) * | 1980-01-30 | 1983-04-07 | Water Res Centre | Transfer of oxygen into wastewater |
| DE3224961A1 (de) * | 1982-07-03 | 1984-01-05 | Bernhard Prof. Dipl.-Ing. 5064 Rösrath Kunst | Hybride fluessigkeitsbegasungsduese |
| ZA835925B (en) * | 1982-09-30 | 1984-04-25 | Black Clawson Co | Method and apparatus for oxygen delignification |
-
1986
- 1986-11-03 AU AU64671/86A patent/AU595842B2/en not_active Ceased
- 1986-11-14 NZ NZ218294A patent/NZ218294A/xx unknown
- 1986-11-14 DE DE8686402533T patent/DE3672580D1/de not_active Expired - Fee Related
- 1986-11-14 EP EP86402533A patent/EP0226495B1/fr not_active Expired - Lifetime
- 1986-11-14 PT PT83745A patent/PT83745B/pt not_active IP Right Cessation
- 1986-11-14 BR BR8605636A patent/BR8605636A/pt unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2006852A (en) * | 1977-10-12 | 1979-05-10 | Airco Inc | Delignification of wood pulp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU613952B2 (en) * | 1987-06-08 | 1991-08-15 | Canadian Liquid Air Ltd. | Method of bleaching or delignification of cellulose pulp with oxygen |
| WO2020072845A1 (en) * | 2018-10-05 | 2020-04-09 | University Of Baltimore | Systems, methods and apparatus for utilizing a resuspension tank |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3672580D1 (de) | 1990-08-16 |
| PT83745A (en) | 1986-12-01 |
| BR8605636A (pt) | 1987-08-18 |
| NZ218294A (en) | 1990-05-28 |
| AU6467186A (en) | 1987-05-21 |
| PT83745B (pt) | 1988-08-17 |
| EP0226495A1 (fr) | 1987-06-24 |
| EP0226495B1 (fr) | 1990-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
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| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |