CA2179700A1 - Method and apparatus for treating pulp - Google Patents
Method and apparatus for treating pulpInfo
- Publication number
- CA2179700A1 CA2179700A1 CA002179700A CA2179700A CA2179700A1 CA 2179700 A1 CA2179700 A1 CA 2179700A1 CA 002179700 A CA002179700 A CA 002179700A CA 2179700 A CA2179700 A CA 2179700A CA 2179700 A1 CA2179700 A1 CA 2179700A1
- Authority
- CA
- Canada
- Prior art keywords
- stage
- treatment
- pulp
- treated
- pko
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000011282 treatment Methods 0.000 claims abstract description 71
- 150000002978 peroxides Chemical class 0.000 claims abstract description 61
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010411 cooking Methods 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims abstract description 5
- 230000035484 reaction time Effects 0.000 claims abstract description 5
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 claims description 22
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 16
- 230000009920 chelation Effects 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000004155 Chlorine dioxide Substances 0.000 claims description 11
- 235000019398 chlorine dioxide Nutrition 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 8
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 6
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 6
- 238000010306 acid treatment Methods 0.000 claims description 5
- 102000004190 Enzymes Human genes 0.000 claims description 4
- 108090000790 Enzymes Proteins 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- URDCARMUOSMFFI-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid Chemical compound OCCN(CC(O)=O)CCN(CC(O)=O)CC(O)=O URDCARMUOSMFFI-UHFFFAOYSA-N 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract description 3
- 239000002655 kraft paper Substances 0.000 abstract description 2
- 238000004061 bleaching Methods 0.000 description 13
- 230000002378 acidificating effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000008139 complexing agent Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
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 |
|---|---|---|---|
| FI953074A FI106216B (sv) | 1995-06-21 | 1995-06-21 | Förfarande och anordning för behandling av massa |
| FI953074 | 1995-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2179700A1 true CA2179700A1 (en) | 1996-12-22 |
Family
ID=8543655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002179700A Abandoned CA2179700A1 (en) | 1995-06-21 | 1996-06-21 | Method and apparatus for treating pulp |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA2179700A1 (sv) |
| FI (1) | FI106216B (sv) |
| SE (1) | SE9602455L (sv) |
-
1995
- 1995-06-21 FI FI953074A patent/FI106216B/sv active
-
1996
- 1996-06-20 SE SE9602455A patent/SE9602455L/sv not_active Application Discontinuation
- 1996-06-21 CA CA002179700A patent/CA2179700A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| FI953074A (sv) | 1996-12-22 |
| FI106216B (sv) | 2000-12-15 |
| SE9602455D0 (sv) | 1996-06-20 |
| SE9602455L (sv) | 1996-12-22 |
| FI953074A0 (sv) | 1995-06-21 |
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| SE526162C2 (sv) | Tillverkning av färdigblekt lövvedsmassa i ett klordioxidsteg följt av ett trycksatt peroxidsteg | |
| CA2190573A1 (en) | Method and apparatus for delignifying chemical pulp | |
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| WO1998014657A1 (en) | Oxidation of disturbing metal ions in bleaching processes | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |