NO122218B - - Google Patents
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- Publication number
- NO122218B NO122218B NO15907465A NO15907465A NO122218B NO 122218 B NO122218 B NO 122218B NO 15907465 A NO15907465 A NO 15907465A NO 15907465 A NO15907465 A NO 15907465A NO 122218 B NO122218 B NO 122218B
- Authority
- NO
- Norway
- Prior art keywords
- bleaching
- pulp
- liquid
- layer
- solution
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 21
- 230000008569 process Effects 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 229920003043 Cellulose fiber Polymers 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000008346 aqueous phase Substances 0.000 claims description 2
- 239000000243 solution Substances 0.000 description 18
- 239000000835 fiber Substances 0.000 description 11
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 8
- 238000011282 treatment Methods 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000004155 Chlorine dioxide Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 235000019398 chlorine dioxide Nutrition 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 229910001902 chlorine oxide Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- -1 borohydrides Chemical compound 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical class OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material 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
- D21C9/1026—Other features in bleaching processes
- D21C9/1031—Pulse, dynamic, displacement processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3308964A GB1100724A (en) | 1964-08-13 | 1964-08-13 | Improvements in the bleaching of pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO122218B true NO122218B (fi) | 1971-06-01 |
Family
ID=10348429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO15907465A NO122218B (fi) | 1964-08-13 | 1965-07-23 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS4830963B1 (fi) |
| BE (1) | BE667857A (fi) |
| CA (1) | CA783483A (fi) |
| DE (1) | DE1546246B2 (fi) |
| FI (1) | FI44325C (fi) |
| FR (1) | FR1443743A (fi) |
| GB (1) | GB1100724A (fi) |
| NO (1) | NO122218B (fi) |
| SE (1) | SE306877B (fi) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE400997B (sv) * | 1972-12-15 | 1978-04-17 | Erco Envirotech Ltd | Sett for avlegsnande av natriumklorid ur regenererad vitlut |
| JPS5036368U (fi) * | 1973-07-25 | 1975-04-16 | ||
| JPS5038966U (fi) * | 1973-08-02 | 1975-04-22 | ||
| BR7506255A (pt) * | 1974-09-27 | 1976-08-31 | Erco Envirotech Ltd | Processo para a producao de polpa alvejada |
| SE426607B (sv) * | 1982-03-29 | 1983-01-31 | Kamyr Ab | Sett att behandla en massasuspension som er i rorelse lengs en bana medelst fortrengning av massans suspensionsvetska med en eller flera ersettningsvetskor |
| FI67891C (fi) * | 1983-02-17 | 1985-06-10 | Larox Ag | Foerfarande foer behandling av den fraon en cellulosas kokningsprocess erhaollna cellulosan |
| US4915785A (en) * | 1988-12-23 | 1990-04-10 | C-I-L Inc. | Single stage process for bleaching of pulp with an aqueous hydrogen peroxide bleaching composition containing magnesium sulphate and sodium silicate |
| FI85513C (fi) * | 1989-04-07 | 1992-04-27 | Salomans Oy | Foerfarande foer behandling av fibermassa med kemikalieloesning. |
-
0
- CA CA783483A patent/CA783483A/en not_active Expired
-
1964
- 1964-08-13 GB GB3308964A patent/GB1100724A/en not_active Expired
-
1965
- 1965-07-23 NO NO15907465A patent/NO122218B/no unknown
- 1965-07-29 DE DE1965E0029799 patent/DE1546246B2/de active Granted
- 1965-08-02 FI FI186165A patent/FI44325C/fi active
- 1965-08-04 SE SE1019365A patent/SE306877B/xx unknown
- 1965-08-04 BE BE667857D patent/BE667857A/xx unknown
- 1965-08-10 JP JP4825865A patent/JPS4830963B1/ja active Pending
- 1965-08-11 FR FR28014A patent/FR1443743A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FI44325C (fi) | 1971-10-11 |
| DE1546246A1 (de) | 1969-07-17 |
| JPS4830963B1 (fi) | 1973-09-26 |
| BE667857A (fi) | 1965-12-01 |
| FI44325B (fi) | 1971-06-30 |
| SE306877B (fi) | 1968-12-09 |
| DE1546246B2 (de) | 1976-10-07 |
| CA783483A (en) | 1968-04-23 |
| FR1443743A (fr) | 1966-06-24 |
| GB1100724A (en) | 1968-01-24 |
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