ATE29537T1 - PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE. - Google Patents
PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE.Info
- Publication number
- ATE29537T1 ATE29537T1 AT84420215T AT84420215T ATE29537T1 AT E29537 T1 ATE29537 T1 AT E29537T1 AT 84420215 T AT84420215 T AT 84420215T AT 84420215 T AT84420215 T AT 84420215T AT E29537 T1 ATE29537 T1 AT E29537T1
- Authority
- AT
- Austria
- Prior art keywords
- hydrogen peroxide
- weight
- alkaline
- concentration
- paper pulp
- Prior art date
Links
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 title abstract 6
- 229920001131 Pulp (paper) Polymers 0.000 title abstract 2
- 238000004061 bleaching Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- 229910052910 alkali metal silicate Inorganic materials 0.000 abstract 1
- 159000000007 calcium salts Chemical class 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 239000008139 complexing agent Substances 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 159000000003 magnesium salts Chemical class 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 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)
- Detergent Compositions (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
- Load-Bearing And Curtain Walls (AREA)
Abstract
1. Process for bleaching chemical paper pulps using hydrogen peroxide, characterized in that the operation is carried out in a single stage at a pH of 11 to 11.5, at a temperature of 70 degrees C to 100 degrees C, with the aid of a solution containing, in addition to hydrogen peroxide, at least one alkaline agent chosen from sodium hydroxide and sodium carbonate, at least one alkali metal silicate at a concentration of at least 0.3% by weight, expressed as SiO2 , at least one magnesium salt and at least one calcium salt in such quantity that the weight concentration of each of these alkaline-earth elements is between 0.05% and 1%, these elements being maintained in the dissolved state with the aid of at least one complexing agent for alkaline-earth ions in such quantity that the total concentration of complexant does not exceed 10% by weight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8320990A FR2557605B1 (en) | 1983-12-29 | 1983-12-29 | PROCESS FOR BLEACHING PAPER PULP BY HYDROGEN PEROXIDE |
| EP84420215A EP0148712B1 (en) | 1983-12-29 | 1984-12-21 | Process for bleaching paper pulps with hydrogen peroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE29537T1 true ATE29537T1 (en) | 1987-09-15 |
Family
ID=9295687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT84420215T ATE29537T1 (en) | 1983-12-29 | 1984-12-21 | PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE. |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0148712B1 (en) |
| JP (1) | JPS60181391A (en) |
| AT (1) | ATE29537T1 (en) |
| AU (1) | AU567787B2 (en) |
| CA (1) | CA1262805A (en) |
| DE (2) | DE3466024D1 (en) |
| ES (1) | ES539151A0 (en) |
| FI (1) | FI76135C (en) |
| FR (1) | FR2557605B1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3544398A1 (en) * | 1985-12-16 | 1987-06-19 | Sueddeutsche Kalkstickstoff | METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS |
| JPH0642046B2 (en) * | 1987-01-29 | 1994-06-01 | 新王子製紙株式会社 | Support for photographic paper |
| SE470065C (en) * | 1991-04-30 | 1996-01-15 | Eka Nobel Ab | Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching |
| DE69420306T2 (en) * | 1993-04-20 | 2000-04-20 | Eka Chemicals Ab | Process for bleaching lignocellulosic pulp |
| IT1290070B1 (en) * | 1997-03-13 | 1998-10-19 | 3V Sigma Spa | COMPOSITIONS FOR THE PAPER WHITENING |
| GB2327894A (en) * | 1997-08-01 | 1999-02-10 | Nippon Paint Co Ltd | Method of multi-layer coating formation |
| US6699358B1 (en) | 1998-05-15 | 2004-03-02 | National Silicates Partnership | Method for brightening chemical pulp with hydrogen peroxide using a magnesium compound in silicate solution |
| CA2332304C (en) * | 1998-05-15 | 2005-01-11 | National Silicates Partnership | Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps |
| US7001484B2 (en) | 2000-05-04 | 2006-02-21 | University Of New Brunswick | Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent |
| US8845860B2 (en) | 2010-09-16 | 2014-09-30 | Georgia-Pacific Consumer Products Lp | High brightness pulps from lignin rich waste papers |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US437813A (en) * | 1890-10-07 | Envelope-machine | ||
| NL97796C (en) * | 1958-05-29 | |||
| US3472813A (en) * | 1967-01-18 | 1969-10-14 | Argus Chem | Resistance of acrylonitrile butadiene styrene polymers to discoloration |
| FR2038056A1 (en) * | 1969-03-07 | 1971-01-08 | Air Liquide | Stable, clear bleaching bath for paper - pulp |
| SE7510015L (en) * | 1975-09-09 | 1977-03-10 | Dev Ab Sca | WAY TO TREAT LIGNOCELLULOSIS-CONTAINING MATERIAL |
| JPS583074B2 (en) * | 1975-11-17 | 1983-01-19 | 三菱瓦斯化学株式会社 | Palpuno Kasan Kabutsu Hiyou Hakuhou |
| JPS5927436B2 (en) * | 1979-05-29 | 1984-07-05 | 王子製紙株式会社 | Peroxide bleaching method for wood pulp |
| FR2476684A1 (en) * | 1980-02-21 | 1981-08-28 | Interox | PROCESS FOR INHIBITING CORROSION OF TITANIUM APPLIANCES |
-
1983
- 1983-12-29 FR FR8320990A patent/FR2557605B1/en not_active Expired
-
1984
- 1984-12-21 DE DE8484420215T patent/DE3466024D1/en not_active Expired
- 1984-12-21 EP EP84420215A patent/EP0148712B1/en not_active Expired
- 1984-12-21 DE DE198484420215T patent/DE148712T1/en active Pending
- 1984-12-21 AT AT84420215T patent/ATE29537T1/en not_active IP Right Cessation
- 1984-12-27 FI FI845121A patent/FI76135C/en not_active IP Right Cessation
- 1984-12-27 JP JP59274194A patent/JPS60181391A/en active Granted
- 1984-12-28 CA CA000471164A patent/CA1262805A/en not_active Expired
- 1984-12-28 AU AU37243/84A patent/AU567787B2/en not_active Ceased
- 1984-12-28 ES ES539151A patent/ES539151A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| EP0148712B1 (en) | 1987-09-09 |
| AU3724384A (en) | 1985-07-04 |
| JPS60181391A (en) | 1985-09-17 |
| DE3466024D1 (en) | 1987-10-15 |
| CA1262805A (en) | 1989-11-14 |
| JPS6261716B2 (en) | 1987-12-23 |
| DE148712T1 (en) | 1986-01-02 |
| FI845121A0 (en) | 1984-12-27 |
| FR2557605B1 (en) | 1987-12-11 |
| FI845121L (en) | 1985-06-30 |
| FR2557605A1 (en) | 1985-07-05 |
| ES8602173A1 (en) | 1985-11-16 |
| FI76135C (en) | 1992-04-15 |
| AU567787B2 (en) | 1987-12-03 |
| EP0148712A1 (en) | 1985-07-17 |
| FI76135B (en) | 1988-05-31 |
| ES539151A0 (en) | 1985-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UEP | Publication of translation of european patent specification | ||
| REN | Ceased due to non-payment of the annual fee |