NO770384L - Fremgangsm}te ved fremstilling av cellulose. - Google Patents
Fremgangsm}te ved fremstilling av cellulose.Info
- Publication number
- NO770384L NO770384L NO770384A NO770384A NO770384L NO 770384 L NO770384 L NO 770384L NO 770384 A NO770384 A NO 770384A NO 770384 A NO770384 A NO 770384A NO 770384 L NO770384 L NO 770384L
- Authority
- NO
- Norway
- Prior art keywords
- bleaching
- pulp
- added
- absolute dry
- peroxide
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 16
- 229920002678 cellulose Polymers 0.000 title claims description 4
- 239000001913 cellulose Substances 0.000 title claims description 4
- 238000004061 bleaching Methods 0.000 claims description 31
- 150000002978 peroxides Chemical class 0.000 claims description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 9
- 229920001131 Pulp (paper) Polymers 0.000 claims description 5
- 239000004115 Sodium Silicate Substances 0.000 claims description 5
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 5
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 2
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims 6
- 239000007788 liquid Substances 0.000 claims 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims 2
- 239000001110 calcium chloride Substances 0.000 claims 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims 2
- 239000008139 complexing agent Substances 0.000 claims 2
- 239000000725 suspension Substances 0.000 claims 2
- 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 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000002203 pretreatment Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 claims 1
- -1 sodium silicate Chemical compound 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000930 thermomechanical effect Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008570 general process Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 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)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7601285A SE407091B (sv) | 1976-02-05 | 1976-02-05 | Sett att peroxidbleka genom raffinering framstelld cellulosamassa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO770384L true NO770384L (no) | 1977-08-08 |
Family
ID=20326919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO770384A NO770384L (no) | 1976-02-05 | 1977-02-04 | Fremgangsm}te ved fremstilling av cellulose. |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5296204A (de) |
| AT (1) | AT357864B (de) |
| BR (1) | BR7700715A (de) |
| DE (1) | DE2704758B2 (de) |
| FI (1) | FI770150A7 (de) |
| FR (1) | FR2340399A1 (de) |
| NO (1) | NO770384L (de) |
| NZ (1) | NZ183120A (de) |
| SE (1) | SE407091B (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE452346C (sv) * | 1982-12-17 | 1990-03-26 | Sunds Defibrator | Foerfarande foer peroxidblekning av lignocellulosahaltigt material i tvaa steg |
| US5002635A (en) * | 1985-09-20 | 1991-03-26 | Scott Paper Company | Method for producing pulp using pre-treatment with stabilizers and refining |
| US4849053A (en) * | 1985-09-20 | 1989-07-18 | Scott Paper Company | Method for producing pulp using pre-treatment with stabilizers and defibration |
| DE69004492T3 (de) * | 1989-06-06 | 2001-11-15 | Eka Nobel Ab, Bohus | Verfahren zum Bleichen von Lignocellulose enthaltenden Zellstoffen. |
| DE4035813A1 (de) * | 1990-11-10 | 1992-05-14 | Akzo Gmbh | Sauerstoffbleichung |
-
1976
- 1976-02-05 SE SE7601285A patent/SE407091B/xx unknown
-
1977
- 1977-01-12 JP JP284577A patent/JPS5296204A/ja active Pending
- 1977-01-19 NZ NZ183120A patent/NZ183120A/xx unknown
- 1977-01-19 FI FI770150A patent/FI770150A7/fi unknown
- 1977-01-27 AT AT50877A patent/AT357864B/de not_active IP Right Cessation
- 1977-02-02 FR FR7702850A patent/FR2340399A1/fr not_active Withdrawn
- 1977-02-04 DE DE2704758A patent/DE2704758B2/de not_active Withdrawn
- 1977-02-04 BR BR7700715A patent/BR7700715A/pt unknown
- 1977-02-04 NO NO770384A patent/NO770384L/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5296204A (en) | 1977-08-12 |
| AT357864B (de) | 1980-08-11 |
| ATA50877A (de) | 1979-12-15 |
| NZ183120A (en) | 1978-09-20 |
| FR2340399A1 (fr) | 1977-09-02 |
| AU2157077A (en) | 1978-08-03 |
| FI770150A7 (de) | 1977-08-06 |
| SE7601285L (sv) | 1977-08-06 |
| DE2704758B2 (de) | 1978-05-11 |
| SE407091B (sv) | 1979-03-12 |
| DE2704758A1 (de) | 1977-08-11 |
| BR7700715A (pt) | 1977-10-11 |
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