FI801157A - Blekningsfoerfarande - Google Patents
BlekningsfoerfarandeInfo
- Publication number
- FI801157A FI801157A FI801157A FI801157A FI801157A FI 801157 A FI801157 A FI 801157A FI 801157 A FI801157 A FI 801157A FI 801157 A FI801157 A FI 801157A FI 801157 A FI801157 A FI 801157A
- Authority
- FI
- Finland
- Prior art keywords
- blekningsfoerfarande
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
- D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/034,922 US4238281A (en) | 1979-04-30 | 1979-04-30 | Simplified bleaching process |
US3492279 | 1979-04-30 |
Publications (3)
Publication Number | Publication Date |
---|---|
FI801157A true FI801157A (fi) | 1980-10-31 |
FI75612B FI75612B (fi) | 1988-03-31 |
FI75612C FI75612C (fi) | 1988-07-11 |
Family
ID=21879479
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI801157A FI75612C (fi) | 1979-04-30 | 1980-04-11 | Blekningsfoerfarande. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4238281A (fi) |
JP (1) | JPS55152891A (fi) |
CA (1) | CA1105205A (fi) |
FI (1) | FI75612C (fi) |
SE (1) | SE449380B (fi) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0279845A4 (en) * | 1986-08-28 | 1991-01-09 | James River-Norwalk, Inc. | Pulp bleaching process |
JPH01151991A (ja) * | 1987-12-07 | 1989-06-14 | Oji Paper Co Ltd | 悪臭ドレーンの脱臭方法 |
US6036726A (en) * | 1995-10-27 | 2000-03-14 | Solutia Inc. | Process for separating polyamide from colorant |
US6083283A (en) * | 1996-10-24 | 2000-07-04 | Solutia Inc. | Method for removing color from ionically dyeable polymeric materials |
US6315863B1 (en) * | 1998-06-18 | 2001-11-13 | Weyerhaeuser Company | Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate |
SE518692C2 (sv) * | 2001-03-20 | 2002-11-05 | Metso Paper Inc | Blekning av massa med klordioxid |
US20080110584A1 (en) * | 2006-11-15 | 2008-05-15 | Caifang Yin | Bleaching process with at least one extraction stage |
SE532370C2 (sv) * | 2008-02-28 | 2009-12-29 | Metso Paper Inc | Metod för blekning av en massa |
CA2821954C (en) | 2010-12-22 | 2019-02-26 | Akzo Nobel Chemicals International B.V. | Process for improving chlorine dioxide bleaching of pulp |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2587064A (en) * | 1949-03-09 | 1952-02-26 | Int Paper Canada | Method of bleaching wood pulp |
USRE28884E (en) | 1965-06-28 | 1976-06-29 | Hooker Chemicals & Plastics Corporation | Woodpulp bleaching process |
GB1217833A (en) * | 1967-01-16 | 1970-12-31 | Electric Reduction Co | Improved cellulosic pulp process |
USRE28887E (en) | 1968-12-26 | 1976-06-29 | Hooker Chemicals & Plastics Corporation | Sequential bleaching of kraft pulp with chlorine dioxide followed by chlorine |
DE2219504C2 (de) * | 1972-04-21 | 1974-10-03 | Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt | Mehrstufenbleiche von Zellstoffen mit erheblich reduziertem Chloreinsatz |
CA973661A (en) * | 1972-09-29 | 1975-09-02 | Pulp And Paper Research Institute Of Canada | Press alkaline extraction of cellulosic pulp |
US4013506A (en) * | 1974-07-22 | 1977-03-22 | Canadian International Paper Company | Method and apparatus for automatically and simultaneously controlling solution viscosity and brightness of a pulp during multi-stage bleaching |
US4104114A (en) * | 1977-05-05 | 1978-08-01 | Erco Envirotech Ltd. | Bleach plant operation |
-
1979
- 1979-04-30 US US06/034,922 patent/US4238281A/en not_active Expired - Lifetime
- 1979-06-06 CA CA329,193A patent/CA1105205A/en not_active Expired
-
1980
- 1980-04-11 FI FI801157A patent/FI75612C/fi not_active IP Right Cessation
- 1980-04-28 SE SE8003216A patent/SE449380B/sv not_active IP Right Cessation
- 1980-04-30 JP JP5772180A patent/JPS55152891A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS55152891A (en) | 1980-11-28 |
SE449380B (sv) | 1987-04-27 |
US4238281A (en) | 1980-12-09 |
CA1105205A (en) | 1981-07-21 |
FI75612B (fi) | 1988-03-31 |
SE8003216L (sv) | 1980-10-31 |
FI75612C (fi) | 1988-07-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed | ||
MM | Patent lapsed |
Owner name: CIP INC. |