FR2340399A1 - Procede pour blanchir une pulpe de bois - Google Patents
Procede pour blanchir une pulpe de boisInfo
- Publication number
- FR2340399A1 FR2340399A1 FR7702850A FR7702850A FR2340399A1 FR 2340399 A1 FR2340399 A1 FR 2340399A1 FR 7702850 A FR7702850 A FR 7702850A FR 7702850 A FR7702850 A FR 7702850A FR 2340399 A1 FR2340399 A1 FR 2340399A1
- Authority
- FR
- France
- Prior art keywords
- silicate
- bleaching
- pulp
- addn
- limited
- 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.)
- Withdrawn
Links
- 238000004061 bleaching Methods 0.000 title abstract 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title abstract 4
- 150000002978 peroxides Chemical class 0.000 title 1
- 239000000725 suspension Substances 0.000 abstract 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 abstract 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 abstract 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 239000001110 calcium chloride Substances 0.000 abstract 1
- 229910001628 calcium chloride Inorganic materials 0.000 abstract 1
- 235000011148 calcium chloride Nutrition 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 239000008139 complexing agent Substances 0.000 abstract 1
- 229960001484 edetic acid Drugs 0.000 abstract 1
- 238000002203 pretreatment Methods 0.000 abstract 1
- 238000007670 refining Methods 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
- D21C9/16—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 |
|---|---|
| FR2340399A1 true FR2340399A1 (fr) | 1977-09-02 |
Family
ID=20326919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7702850A Withdrawn FR2340399A1 (fr) | 1976-02-05 | 1977-02-02 | Procede pour blanchir une pulpe de bois |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5296204A (enExample) |
| AT (1) | AT357864B (enExample) |
| BR (1) | BR7700715A (enExample) |
| DE (1) | DE2704758B2 (enExample) |
| FI (1) | FI770150A7 (enExample) |
| FR (1) | FR2340399A1 (enExample) |
| NO (1) | NO770384L (enExample) |
| NZ (1) | NZ183120A (enExample) |
| SE (1) | SE407091B (enExample) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0485829A1 (de) * | 1990-11-10 | 1992-05-20 | Akzo Nobel N.V. | Sauerstoffbleichung |
Families Citing this family (4)
| 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 |
| US4849053A (en) * | 1985-09-20 | 1989-07-18 | Scott Paper Company | Method for producing pulp using pre-treatment with stabilizers and defibration |
| US5002635A (en) * | 1985-09-20 | 1991-03-26 | Scott Paper Company | Method for producing pulp using pre-treatment with stabilizers and refining |
| DE402335T1 (de) * | 1989-06-06 | 1992-04-09 | Eka Nobel Ab, Surte | Verfahren zum bleichen von lignocellulose enthaltenden zellstoffen. |
-
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 NO NO770384A patent/NO770384L/no unknown
- 1977-02-04 BR BR7700715A patent/BR7700715A/pt unknown
- 1977-02-04 DE DE2704758A patent/DE2704758B2/de not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0485829A1 (de) * | 1990-11-10 | 1992-05-20 | Akzo Nobel N.V. | Sauerstoffbleichung |
| US5322647A (en) * | 1990-11-10 | 1994-06-21 | Akzo N.V. | Oxygen bleaching of cotton linters by disproportionation of hydrogen peroxide |
Also Published As
| Publication number | Publication date |
|---|---|
| FI770150A7 (enExample) | 1977-08-06 |
| SE7601285L (sv) | 1977-08-06 |
| NO770384L (no) | 1977-08-08 |
| AU2157077A (en) | 1978-08-03 |
| BR7700715A (pt) | 1977-10-11 |
| JPS5296204A (en) | 1977-08-12 |
| ATA50877A (de) | 1979-12-15 |
| DE2704758B2 (de) | 1978-05-11 |
| SE407091B (sv) | 1979-03-12 |
| DE2704758A1 (de) | 1977-08-11 |
| AT357864B (de) | 1980-08-11 |
| NZ183120A (en) | 1978-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4029543A (en) | Mechanically freeing wood fibers in the presence of spent peroxide bleaching liquor | |
| DE3878046D1 (de) | Maschinelles waschverfahren. | |
| US3098784A (en) | Process of deinking printed paper | |
| NZ210398A (en) | Detergent bleach composition containing a peroxide compound and a manganese compound | |
| GB1274615A (en) | Bleaching of cellulosic pulp | |
| SE8306744L (sv) | Forfarande for upplosning av cellulosakarbamat | |
| FR2340399A1 (fr) | Procede pour blanchir une pulpe de bois | |
| EP0114788A3 (en) | Aqueous composition containing polymaleic acid, surfactants and complexing agents as well as its preparation and use as assistant in the pretreatment of cellulose containing fibrous materials | |
| ATE36565T1 (de) | Peroxydbleichverfahren fuer cellulose enthaltendes material. | |
| ATE29537T1 (de) | Verfahren zum bleichen von papierpulpen mittels wasserstoffperoxid. | |
| GB2015490A (en) | Stabilized pumpable aqueous dispersions | |
| US3186899A (en) | Groundwood pulp | |
| SE8102597L (sv) | Forfarande for framstellning av alkalisk sulfitmassa | |
| US2826478A (en) | Method of bleaching mechanically-disintegrated wood pulp with hydrosulfite bleach containing an alkali metal citrate | |
| JPS5263184A (en) | Liquid bleaching agent composition | |
| GB1229269A (enExample) | ||
| ES396324A1 (es) | Procedimiento de fabricacion de acido silicico y silicatos en estado alcalino por recuperacion de los mismos de licor negro que contenga silicatos solubles en agua. | |
| SE8602057L (sv) | Forfarande for blekning av ns-aq- eller sap-massa | |
| SU389122A1 (ru) | Способ изготовления клея | |
| SU440468A1 (ru) | Бумажна масса | |
| GB785060A (en) | Process for obtaining bleached semi-chemical pulp | |
| SE7904430L (sv) | Massablekning | |
| US2275261A (en) | Opacifier for enamels | |
| SU566898A1 (ru) | Состав дл проклейки бумаги в массе | |
| FR2122963A5 (en) | Bleaching cellulose pulp - using buffered hypochlorination to minimise colour of waste liquor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |