CA1339594C - 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 - Google Patents
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 contentInfo
- Publication number
- CA1339594C CA1339594C CA000611773A CA611773A CA1339594C CA 1339594 C CA1339594 C CA 1339594C CA 000611773 A CA000611773 A CA 000611773A CA 611773 A CA611773 A CA 611773A CA 1339594 C CA1339594 C CA 1339594C
- Authority
- CA
- Canada
- Prior art keywords
- bleaching
- pulp
- chemical
- oxidation stage
- procedure
- 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.)
- Expired - Fee Related
Links
- 238000004061 bleaching Methods 0.000 title claims abstract 15
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 title claims abstract 14
- 238000000034 method Methods 0.000 title claims abstract 12
- 230000003647 oxidation Effects 0.000 title claims abstract 12
- 238000007254 oxidation reaction Methods 0.000 title claims abstract 12
- 108090000790 Enzymes Proteins 0.000 title claims abstract 11
- 102000004190 Enzymes Human genes 0.000 title claims abstract 11
- 239000000126 substance Substances 0.000 title claims abstract 10
- 239000004155 Chlorine dioxide Substances 0.000 title claims abstract 7
- 235000019398 chlorine dioxide Nutrition 0.000 title claims abstract 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract 6
- 239000000460 chlorine Substances 0.000 claims abstract 6
- 229910052801 chlorine Inorganic materials 0.000 claims abstract 6
- 239000003513 alkali Substances 0.000 claims abstract 3
- 229940088598 enzyme Drugs 0.000 claims 7
- 239000000203 mixture Substances 0.000 claims 3
- 108010059892 Cellulase Proteins 0.000 claims 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims 2
- 108090000371 Esterases Proteins 0.000 claims 2
- 108010059820 Polygalacturonase Proteins 0.000 claims 2
- 229940106157 cellulase Drugs 0.000 claims 2
- 108010093305 exopolygalacturonase Proteins 0.000 claims 2
- 229940059442 hemicellulase Drugs 0.000 claims 2
- 108010002430 hemicellulase Proteins 0.000 claims 2
- VGVRPFIJEJYOFN-UHFFFAOYSA-N 2,3,4,6-tetrachlorophenol Chemical class OC1=C(Cl)C=C(Cl)C(Cl)=C1Cl VGVRPFIJEJYOFN-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 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
- D21C9/1057—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)
- Noodles (AREA)
- Cereal-Derived Products (AREA)
- Table Devices Or Equipment (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 bleaching effluent, simultaneously lowering its chemical oxygen demand.
Claims (11)
1. Procedure for the bleaching of pulp, in which procedure an oxidating bleaching chemical containing chlorine is used, characterized in that, in the oxidation stage, a chemical with a chlorine dioxide content of at least 50% is used, that the pulp s 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.
2. Procedure according to claim 1, characterized in that, in the oxidation stage, a chemical with a chlorine dioxide content of at least 70% is used.
3. Procedure according to claim 1, characterized in that the bleaching chemical used in the oxidation stage is a mixture containing chlorine gas in addition to chlorine dioxide.
4. Procedure according to any one of claims 1 to 3, characterized in that the pulp is treated with an enzyme and washed before the first oxidation stage.
5. Procedure according to any one of claims 1 to 3, characterized in that, after the oxidation stage, the pulp is washed, whereupon the bleaching process continues with an alkali treatment.
6. Procedure according to any one of claims 1 to 3, characterized in that the enzyme treatment is carried out in a temperature range of 10-90° C with pH values in the range 3.0-10Ø
7. Procedure according to any one of claims 1 to 3, characterized in that the enzyme used is a hemicellulase, cellulase, pectinase, esterase or a mixture of these.
8. Use of an enzyme for reducing the chlorine content of the bleaching effluent produced in the bleaching of pulp when an oxidating bleaching chemical with a chlorine dioxide content of at least 50% is used.
9. Use of an enzyme according to claim 8 for reducing the chlorine content of the bleaching effluent in the bleaching of pulp when a chemical containing chlorine gas and chlorine dioxide is used in the oxidation stage.
10. Use of a hemicellulase, cellulase, pectinase, esterase or a mixture of these for reducing the chlorine content of the bleaching effluent produced in the bleaching of pulp.
11. Procedure according to claim 6, characterized in that the temperature range is 40-75°C and the pH range is 4.0-9Ø
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI890700 | 1989-02-14 | ||
| FI890700A FI90888B (en) | 1989-02-14 | 1989-02-14 | Method for bleaching cellulose pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1339594C true CA1339594C (en) | 1997-12-23 |
Family
ID=8527891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000611773A Expired - Fee Related 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 |
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 |
| US5935836A (en) * | 1994-07-29 | 1999-08-10 | Rohm Enzyme Finland Oy | Actinomadura xylanase sequences and methods of use |
| 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 |
| WO2002057541A2 (en) | 2001-01-18 | 2002-07-25 | Iogen Bio-Products Corporation | Use of xylanase in pulp bleaching |
| WO2003074780A1 (en) * | 2002-03-06 | 2003-09-12 | 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 ES ES89117235T patent/ES2050747T3/en not_active Expired - Lifetime
- 1989-09-18 DE DE89117235T patent/DE68914135D1/en not_active Expired - Lifetime
- 1989-09-18 AT AT89117235T patent/ATE103351T1/en not_active IP Right Cessation
- 1989-09-18 NO NO893714A patent/NO176406C/en not_active IP Right Cessation
- 1989-09-18 JP JP1241667A patent/JPH02221482A/en active Pending
- 1989-09-18 EP EP89117235A patent/EP0383999B1/en not_active Revoked
- 1989-09-18 CA CA000611773A patent/CA1339594C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI890700A0 (en) | 1989-02-14 |
| EP0383999A3 (en) | 1990-12-12 |
| EP0383999A2 (en) | 1990-08-29 |
| FI90888B (en) | 1993-12-31 |
| DE68914135D1 (en) | 1994-04-28 |
| NO893714L (en) | 1990-08-15 |
| EP0383999B1 (en) | 1994-03-23 |
| NO893714D0 (en) | 1989-09-18 |
| ATE103351T1 (en) | 1994-04-15 |
| JPH02221482A (en) | 1990-09-04 |
| NO176406B (en) | 1994-12-19 |
| NO176406C (en) | 1995-03-29 |
| FI890700A (en) | 1990-08-15 |
| ES2050747T3 (en) | 1994-06-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |