FI90888B - Method for bleaching cellulose pulp - Google Patents
Method for bleaching cellulose pulpInfo
- Publication number
- FI90888B FI90888B FI890700A FI890700A FI90888B FI 90888 B FI90888 B FI 90888B FI 890700 A FI890700 A FI 890700A FI 890700 A FI890700 A FI 890700A FI 90888 B FI90888 B FI 90888B
- Authority
- FI
- Finland
- Prior art keywords
- pulp
- oxidation
- bleaching
- chemical
- chlorine
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cereal-Derived Products (AREA)
- Table Devices Or Equipment (AREA)
- Noodles (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
The invention concerns a procedure for the bleaching of pulp using an oxidating bleaching chemical containing chlorine. The essential features of the invention are that the chemical used in the oxidation stage has a chlorine dioxide content of at least 50 %, that the pulp is subjected to enzyme treatment either in conjunction with or before the oxidation, and that, after the oxidation and enzyme treatment, the pulp is treated with an alkali. The use of enzymes reduces the amount of chlorophenols and other forms of organically bound chlorine in the spent bleach liquor, simultaneously lowering its chemical oxygen demand.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI890700A FI90888B (en) | 1989-02-14 | 1989-02-14 | Method for bleaching cellulose pulp |
AT89117235T ATE103351T1 (en) | 1989-02-14 | 1989-09-18 | METHOD OF BLEACHING PULP. |
ES89117235T ES2050747T3 (en) | 1989-02-14 | 1989-09-18 | PROCEDURE FOR THE BLEACHING OF PAPER PASTA. |
NO893714A NO176406C (en) | 1989-02-14 | 1989-09-18 | Method of Bleaching Mass |
JP1241667A JPH02221482A (en) | 1989-02-14 | 1989-09-18 | Bleaching of pulp |
CA000611773A CA1339594C (en) | 1989-02-14 | 1989-09-18 | Procedure for the bleaching of pulp involving enzyme treatment and the use in the oxidation stage of a chemical with at least 50% chlorine dioxide content |
EP89117235A EP0383999B1 (en) | 1989-02-14 | 1989-09-18 | Procedure for the bleaching of pulp |
DE89117235T DE68914135D1 (en) | 1989-02-14 | 1989-09-18 | Process for bleaching pulp. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI890700A FI90888B (en) | 1989-02-14 | 1989-02-14 | Method for bleaching cellulose pulp |
Publications (3)
Publication Number | Publication Date |
---|---|
FI890700A0 FI890700A0 (en) | 1989-02-14 |
FI890700A FI890700A (en) | 1990-08-15 |
FI90888B true FI90888B (en) | 1993-12-31 |
Family
ID=8527891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI890700A FI90888B (en) | 1989-02-14 | 1989-02-14 | Method for bleaching cellulose pulp |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0383999B1 (en) |
JP (1) | JPH02221482A (en) |
AT (1) | ATE103351T1 (en) |
CA (1) | CA1339594C (en) |
DE (1) | DE68914135D1 (en) |
ES (1) | ES2050747T3 (en) |
FI (1) | FI90888B (en) |
NO (1) | NO176406C (en) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI86896B (en) * | 1989-05-04 | 1992-07-15 | Enso Gutzeit Oy | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. |
SE465320B (en) * | 1990-01-10 | 1991-08-26 | Korsnaes Ab | PREPARATIONS SUBMITTING ENZYMATIC DELIGNIFICATION ACTIVITY, MADE TO MAKE THE SAME AND APPLICATIONS THEREOF |
FI89814C (en) * | 1990-02-02 | 1993-11-25 | Enso Gutzeit Oy | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA |
US5837515A (en) * | 1990-05-16 | 1998-11-17 | Alko-Yhtiot Oy | Enzyme preparations and methods for their production |
JP2859393B2 (en) * | 1990-07-24 | 1999-02-17 | ノボ ノルディスク アクティーゼルスカブ | Cellulase and method for producing the same |
DK203490D0 (en) * | 1990-08-24 | 1990-08-24 | Novo Nordisk As | PROCEDURE FOR TREATING LIGNOCELLULOS PULP AND APPARATUS FOR PERFORMING THE PROCESS |
DE4129739A1 (en) * | 1990-09-11 | 1992-03-12 | Sandoz Ag | Chlorine-free bleaching of paper pulp |
FI108800B (en) * | 1991-05-07 | 2002-03-28 | Iogen Corp | A method and apparatus for using an enzyme in the manufacture and bleaching of pulp |
CA2044100A1 (en) * | 1991-06-07 | 1992-12-08 | Janice Hamilton | Biobleaching process |
US5369024A (en) * | 1992-03-25 | 1994-11-29 | The United States Of America As Represented By The Secretary Of Agriculture | Xylanase from streptomyces roseiscleroticus NRRL-11019 for removing color from kraft wood pulps |
US5498534A (en) * | 1992-03-25 | 1996-03-12 | The United States Of America As Represented By The Secretary Of Agriculture | Method of removing color from wood pulp using xylanase from streptomyces roseiscleroticus NRRL B-11019 |
DE4422307A1 (en) * | 1994-06-17 | 1995-12-21 | Melitta Haushaltsprodukte | Process for delignifying and bleaching unbleached pulp suspensions using nitrogen compounds |
US7816129B2 (en) | 1994-07-29 | 2010-10-19 | Ab Enzymes Gmbh | Production and secretion of proteins of bacterial origin in filamentous fungi |
US5871730A (en) * | 1994-07-29 | 1999-02-16 | Universite De Sherbrooke | Thermostable xylanase DNA, protein and methods of use |
US6300114B1 (en) | 1994-07-29 | 2001-10-09 | Rohm Enzyme Finland Oy | Sequences of xylanase and xylanase expression vectors |
US5935836A (en) * | 1994-07-29 | 1999-08-10 | Rohm Enzyme Finland Oy | Actinomadura xylanase sequences and methods of use |
AU2002229430A1 (en) | 2001-01-18 | 2002-07-30 | Iogen Bio-Products Corporation | Use of xylanase in pulp bleaching |
US7368036B2 (en) | 2002-03-06 | 2008-05-06 | Iogen Bio-Products Corporation | Xylanase treatment of chemical pulp |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1086905A (en) * | 1977-10-25 | 1980-10-07 | W. Howard Rapson | Bleach plant operation |
JPS5468402A (en) * | 1977-11-09 | 1979-06-01 | Kogyo Gijutsuin | Property modification of biochemical pulp |
FI81395B (en) * | 1988-03-14 | 1990-06-29 | Cultor Oy | FOERFARANDE FOER BLEKNING AV CELLULOSAMASSA. |
-
1989
- 1989-02-14 FI FI890700A patent/FI90888B/en not_active Application Discontinuation
- 1989-09-18 JP JP1241667A patent/JPH02221482A/en active Pending
- 1989-09-18 CA CA000611773A patent/CA1339594C/en not_active Expired - Fee Related
- 1989-09-18 NO NO893714A patent/NO176406C/en not_active IP Right Cessation
- 1989-09-18 DE DE89117235T patent/DE68914135D1/en not_active Expired - Lifetime
- 1989-09-18 ES ES89117235T patent/ES2050747T3/en not_active Expired - Lifetime
- 1989-09-18 EP EP89117235A patent/EP0383999B1/en not_active Revoked
- 1989-09-18 AT AT89117235T patent/ATE103351T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0383999A3 (en) | 1990-12-12 |
EP0383999B1 (en) | 1994-03-23 |
FI890700A (en) | 1990-08-15 |
NO893714D0 (en) | 1989-09-18 |
ES2050747T3 (en) | 1994-06-01 |
NO176406B (en) | 1994-12-19 |
JPH02221482A (en) | 1990-09-04 |
ATE103351T1 (en) | 1994-04-15 |
FI890700A0 (en) | 1989-02-14 |
NO893714L (en) | 1990-08-15 |
NO176406C (en) | 1995-03-29 |
EP0383999A2 (en) | 1990-08-29 |
DE68914135D1 (en) | 1994-04-28 |
CA1339594C (en) | 1997-12-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BB | Publication of examined application | ||
CD | Patent refused following opposition | ||
FC | Application refused |
Owner name: ENSO GUTZEIT OY |