CA2033855A1 - Process for countercurrent washing and bleaching of a pulp from chemical pulping - Google Patents
Process for countercurrent washing and bleaching of a pulp from chemical pulpingInfo
- Publication number
- CA2033855A1 CA2033855A1 CA002033855A CA2033855A CA2033855A1 CA 2033855 A1 CA2033855 A1 CA 2033855A1 CA 002033855 A CA002033855 A CA 002033855A CA 2033855 A CA2033855 A CA 2033855A CA 2033855 A1 CA2033855 A1 CA 2033855A1
- Authority
- CA
- Canada
- Prior art keywords
- pulp
- bleaching
- washing
- wash
- directed
- 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
- 238000004061 bleaching Methods 0.000 title claims abstract description 59
- 238000005406 washing Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 30
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 238000004537 pulping Methods 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000000706 filtrate Substances 0.000 claims abstract description 27
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 230000008020 evaporation Effects 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 12
- YUHVVTLNLCJEOB-UHFFFAOYSA-N [Cl].O=Cl=O Chemical compound [Cl].O=Cl=O YUHVVTLNLCJEOB-UHFFFAOYSA-N 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 10
- 239000000460 chlorine Substances 0.000 description 10
- 229910052801 chlorine Inorganic materials 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 239000007844 bleaching agent Substances 0.000 description 5
- 238000010411 cooking Methods 0.000 description 5
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000002311 subsequent effect Effects 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
-
- 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
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
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 |
|---|---|---|---|
| FI900162A FI86895C (fi) | 1990-01-11 | 1990-01-11 | Foerfarande foer motstroemstvaettning och blekning av massa fraon cellulosakok |
| FI900162 | 1990-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2033855A1 true CA2033855A1 (en) | 1991-07-12 |
Family
ID=8529679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002033855A Abandoned CA2033855A1 (en) | 1990-01-11 | 1991-01-09 | Process for countercurrent washing and bleaching of a pulp from chemical pulping |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JP3001990B2 (ja) |
| AU (1) | AU6859891A (ja) |
| BR (1) | BR9100093A (ja) |
| CA (1) | CA2033855A1 (ja) |
| FI (1) | FI86895C (ja) |
| SE (1) | SE510558C2 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI85513C (fi) * | 1989-04-07 | 1992-04-27 | Salomans Oy | Foerfarande foer behandling av fibermassa med kemikalieloesning. |
-
1990
- 1990-01-11 FI FI900162A patent/FI86895C/fi active IP Right Grant
-
1991
- 1991-01-04 SE SE9100024A patent/SE510558C2/sv not_active IP Right Cessation
- 1991-01-04 AU AU68598/91A patent/AU6859891A/en not_active Abandoned
- 1991-01-09 CA CA002033855A patent/CA2033855A1/en not_active Abandoned
- 1991-01-10 BR BR919100093A patent/BR9100093A/pt not_active IP Right Cessation
- 1991-01-11 JP JP3013721A patent/JP3001990B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FI86895C (fi) | 1997-01-15 |
| JPH04333684A (ja) | 1992-11-20 |
| JP3001990B2 (ja) | 2000-01-24 |
| BR9100093A (pt) | 1991-10-22 |
| FI900162A (fi) | 1991-07-12 |
| FI900162A0 (fi) | 1990-01-11 |
| FI86895B (fi) | 1992-07-15 |
| SE510558C2 (sv) | 1999-06-07 |
| AU6859891A (en) | 1991-07-18 |
| SE9100024D0 (sv) | 1991-01-04 |
| SE9100024L (sv) | 1991-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |