SE9203801L - MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY - Google Patents
MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITYInfo
- Publication number
- SE9203801L SE9203801L SE9203801A SE9203801A SE9203801L SE 9203801 L SE9203801 L SE 9203801L SE 9203801 A SE9203801 A SE 9203801A SE 9203801 A SE9203801 A SE 9203801A SE 9203801 L SE9203801 L SE 9203801L
- Authority
- SE
- Sweden
- Prior art keywords
- pulp
- mass
- oxygen
- alkalite
- eligibility
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
-
- 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
Abstract
Unbleached pulp (8) is combined with an aqueous alkaline solution (10, 14A) while in a state of low consistency to distribute a first amount of alkaline material substantially uniformly throughout the pulp. The consistency of the pulp is then increased to above about 18 % (12) and the high consistency alkali containing pulp is then treated with oxygen (21) to effect delignification (20). The total amount of alkaline material applied to the pulp is between 0.8 and 7 % by weight of oven dry pulp. High strength, low lignin pulps are subsequently formed which may be further bleached to high brightness with reduced amounts of chemicals.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19910909663 EP0539381A4 (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification. |
PCT/US1991/002673 WO1992018689A1 (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification |
AU78754/91A AU647485B2 (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification |
JP3509138A JPH06501290A (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition method for high consistency oxygen delignification |
CA002069447A CA2069447C (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification |
CN91103486A CN1066308A (en) | 1991-04-18 | 1991-04-30 | The pulp alkali addition method that is used for the high concentration oxygen delignification |
SE9203801A SE9203801L (en) | 1991-04-18 | 1992-12-17 | MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1991/002673 WO1992018689A1 (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification |
CA002069447A CA2069447C (en) | 1991-04-18 | 1991-04-18 | Pulp alkali addition process for high consistency oxygen delignification |
CN91103486A CN1066308A (en) | 1991-04-18 | 1991-04-30 | The pulp alkali addition method that is used for the high concentration oxygen delignification |
SE9203801A SE9203801L (en) | 1991-04-18 | 1992-12-17 | MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY |
Publications (2)
Publication Number | Publication Date |
---|---|
SE9203801D0 SE9203801D0 (en) | 1992-12-17 |
SE9203801L true SE9203801L (en) | 1993-02-10 |
Family
ID=27426917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9203801A SE9203801L (en) | 1991-04-18 | 1992-12-17 | MASS PREPARATION PROCEDURE WITH ALKALITE ADDITION FOR THICK MASS OXYGEN ELIGIBILITY |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0539381A4 (en) |
JP (1) | JPH06501290A (en) |
CN (1) | CN1066308A (en) |
AU (1) | AU647485B2 (en) |
CA (1) | CA2069447C (en) |
SE (1) | SE9203801L (en) |
WO (1) | WO1992018689A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0530881A1 (en) * | 1991-08-14 | 1993-03-10 | Union Camp Patent Holding, Inc. | Use of wash press for pulp alkali addition process |
CN100395403C (en) * | 2007-08-03 | 2008-06-18 | 山东泉林纸业有限责任公司 | Oxygen delignify treating method for grass group unbleached chemical pulp |
CA3203347A1 (en) * | 2018-05-28 | 2019-12-05 | Pierson Capital Environmental (Beijing) Limited | Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE334286B (en) * | 1968-12-05 | 1971-04-19 | Mo Och Domsjoe Ab | |
US4198266A (en) * | 1977-10-12 | 1980-04-15 | Airco, Inc. | Oxygen delignification of wood pulp |
US4198261A (en) * | 1977-12-05 | 1980-04-15 | Gould Inc. | Method for end point detection during plasma etching |
US4806203A (en) * | 1985-02-14 | 1989-02-21 | Elton Edward F | Method for alkaline delignification of lignocellulosic fibrous material at a consistency which is raised during reaction |
JPH02289194A (en) * | 1989-04-20 | 1990-11-29 | Mitsubishi Paper Mills Ltd | Method for bleaching lignocellulosic substance with oxygen |
-
1991
- 1991-04-18 JP JP3509138A patent/JPH06501290A/en active Pending
- 1991-04-18 CA CA002069447A patent/CA2069447C/en not_active Expired - Fee Related
- 1991-04-18 WO PCT/US1991/002673 patent/WO1992018689A1/en not_active Application Discontinuation
- 1991-04-18 AU AU78754/91A patent/AU647485B2/en not_active Ceased
- 1991-04-18 EP EP19910909663 patent/EP0539381A4/en not_active Withdrawn
- 1991-04-30 CN CN91103486A patent/CN1066308A/en active Pending
-
1992
- 1992-12-17 SE SE9203801A patent/SE9203801L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
JPH06501290A (en) | 1994-02-10 |
EP0539381A1 (en) | 1993-05-05 |
CA2069447A1 (en) | 1992-10-19 |
SE9203801D0 (en) | 1992-12-17 |
CN1066308A (en) | 1992-11-18 |
AU7875491A (en) | 1992-11-17 |
AU647485B2 (en) | 1994-03-24 |
CA2069447C (en) | 1996-08-27 |
EP0539381A4 (en) | 1994-10-12 |
WO1992018689A1 (en) | 1992-10-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 9203801-7 |