ATE48291T1 - PROCESS FOR BLEACHING CHEMICAL WOOD PULP. - Google Patents
PROCESS FOR BLEACHING CHEMICAL WOOD PULP.Info
- Publication number
- ATE48291T1 ATE48291T1 AT86420266T AT86420266T ATE48291T1 AT E48291 T1 ATE48291 T1 AT E48291T1 AT 86420266 T AT86420266 T AT 86420266T AT 86420266 T AT86420266 T AT 86420266T AT E48291 T1 ATE48291 T1 AT E48291T1
- Authority
- AT
- Austria
- Prior art keywords
- pulp
- alkaline extraction
- treatment
- wood pulp
- bleaching chemical
- Prior art date
Links
- 238000004061 bleaching Methods 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 239000000126 substance Substances 0.000 title abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 6
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 abstract 6
- 238000000605 extraction Methods 0.000 abstract 4
- 239000004155 Chlorine dioxide Substances 0.000 abstract 3
- 235000019398 chlorine dioxide Nutrition 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 229910001902 chlorine oxide Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen 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
- D21C9/1026—Other features in bleaching processes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Detergent Compositions (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
1. Process for bleaching chemical papermaking pulps in a bleaching sequence including, in succession, a treatment of the pulp by means of chlorine and chlorine dioxide acting in a single bath, a first alkaline extraction by means of sodium hydroxide, a treatment of the pulp by means of chlorine dioxide, a second alkaline extraction by means of sodium hydroxide and again a treatment of the pulp by means of chlorine dioxide, characterized in that the pulp is subjected at the same time to the action of oxygen during the first alkaline extraction and to the action of hydrogen peroxide during the second alkaline extraction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8516332A FR2589494B1 (en) | 1985-10-30 | 1985-10-30 | PROCESS FOR BLEACHING CHEMICAL PAPER PULP |
| EP86420266A EP0222674B1 (en) | 1985-10-30 | 1986-10-28 | Process for bleaching chemical wood pulps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ATE48291T1 true ATE48291T1 (en) | 1989-12-15 |
Family
ID=9324477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT86420266T ATE48291T1 (en) | 1985-10-30 | 1986-10-28 | PROCESS FOR BLEACHING CHEMICAL WOOD PULP. |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0222674B1 (en) |
| JP (1) | JPS62141188A (en) |
| AT (1) | ATE48291T1 (en) |
| AU (1) | AU603556B2 (en) |
| DE (2) | DE3667184D1 (en) |
| ES (1) | ES2000019B3 (en) |
| FI (1) | FI85294B (en) |
| FR (1) | FR2589494B1 (en) |
| NO (1) | NO864319L (en) |
| PT (1) | PT83649B (en) |
| ZA (1) | ZA868275B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4031597A1 (en) * | 1990-10-05 | 1992-04-09 | Sueddeutsche Kalkstickstoff | METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR |
| US6569284B1 (en) * | 1996-09-24 | 2003-05-27 | International Paper Company | Elemental-chlorine-free bleaching process having an initial Eo or Eop stage |
| FR3062138B1 (en) * | 2017-01-23 | 2019-06-07 | Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses | PROCESS FOR WHITENING A PAPER PULP |
-
1985
- 1985-10-30 FR FR8516332A patent/FR2589494B1/en not_active Expired
-
1986
- 1986-10-28 ES ES86420266T patent/ES2000019B3/en not_active Expired - Lifetime
- 1986-10-28 DE DE8686420266T patent/DE3667184D1/en not_active Revoked
- 1986-10-28 EP EP86420266A patent/EP0222674B1/en not_active Expired
- 1986-10-28 DE DE198686420266T patent/DE222674T1/en active Pending
- 1986-10-28 AT AT86420266T patent/ATE48291T1/en not_active IP Right Cessation
- 1986-10-29 AU AU64492/86A patent/AU603556B2/en not_active Ceased
- 1986-10-29 PT PT83649A patent/PT83649B/en not_active IP Right Cessation
- 1986-10-29 NO NO864319A patent/NO864319L/en unknown
- 1986-10-29 FI FI864411A patent/FI85294B/en not_active Application Discontinuation
- 1986-10-30 ZA ZA868275A patent/ZA868275B/en unknown
- 1986-10-30 JP JP61259562A patent/JPS62141188A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| FR2589494B1 (en) | 1988-07-29 |
| FI864411A0 (en) | 1986-10-29 |
| JPH0116958B2 (en) | 1989-03-28 |
| EP0222674B1 (en) | 1989-11-29 |
| DE222674T1 (en) | 1987-10-15 |
| EP0222674A1 (en) | 1987-05-20 |
| NO864319L (en) | 1987-05-04 |
| PT83649B (en) | 1989-05-31 |
| PT83649A (en) | 1986-11-01 |
| FI864411L (en) | 1987-05-01 |
| AU6449286A (en) | 1987-05-07 |
| ZA868275B (en) | 1987-06-24 |
| NO864319D0 (en) | 1986-10-29 |
| DE3667184D1 (en) | 1990-01-04 |
| ES2000019A4 (en) | 1987-09-16 |
| FI85294B (en) | 1991-12-13 |
| AU603556B2 (en) | 1990-11-22 |
| ES2000019B3 (en) | 1990-03-16 |
| FR2589494A1 (en) | 1987-05-07 |
| JPS62141188A (en) | 1987-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| SE8504236D0 (en) | IMPROVE OXIDATIVE EXTRACTION | |
| SE7902901L (en) | OXYGEN LIGNIFIED BLOCK, CELLULOSIZED PULP WITH OZON | |
| ATE48290T1 (en) | PROCESSES FOR DELIGNIFICATION AND BLEACHING OF PULP. | |
| ATE31333T1 (en) | METHOD OF BLEACHING MECHANICAL PULP USING HYDROGEN PEROXIDE. | |
| DE68914135D1 (en) | Process for bleaching pulp. | |
| ATE130388T1 (en) | METHOD FOR BLEACHING MECHANICAL WOOD. | |
| ATE54475T1 (en) | PROCESSES FOR BLEACHING AND DELIGNIFICATION OF PULP-CONTAINING PRODUCTS. | |
| FI99152B (en) | With hydrogen peroxide enhanced oxygen delignification | |
| ATE110129T1 (en) | METHOD OF BLEACHING CHEMICAL PULP. | |
| ATE48291T1 (en) | PROCESS FOR BLEACHING CHEMICAL WOOD PULP. | |
| ATE24745T1 (en) | HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP. | |
| DE69113444D1 (en) | METHOD FOR BLEACHING CHEMICAL PAPER FIBER. | |
| SE8604852D0 (en) | DELIGNIFICATION AND BLEACHING OF A CELLULOSE PULP WITH AN ALKALI-OXYGEN HYPOCHLORITE EXTRACTION | |
| DE69226143D1 (en) | Process to improve selectivity in chemical pulp delignification | |
| ATE183264T1 (en) | METHOD FOR BLEACHING PULP WITHOUT USING CHEMICALS CONTAINING CHLORINE | |
| SE8503597L (en) | IMPROVED DELIGNIFICATION OF MASS | |
| SE9002001D0 (en) | METHOD FOR SUPPLYING WATER PEROXIDE IN CELLULOSA PENSIONS | |
| ATE35433T1 (en) | METHODS OF PREPARING CHEMICAL WOOD PULP FOR BLEACHING. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| UEP | Publication of translation of european patent specification | ||
| RZN | Patent revoked |