ES2008654A4 - Procedimiento para blanquear pastas. - Google Patents
Procedimiento para blanquear pastas.Info
- Publication number
- ES2008654A4 ES2008654A4 ES88420339T ES88420339T ES2008654A4 ES 2008654 A4 ES2008654 A4 ES 2008654A4 ES 88420339 T ES88420339 T ES 88420339T ES 88420339 T ES88420339 T ES 88420339T ES 2008654 A4 ES2008654 A4 ES 2008654A4
- Authority
- ES
- Spain
- Prior art keywords
- bleaching
- hydrogen peroxide
- pasta
- procedure
- stage
- 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.)
- Pending
Links
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)
- Medicinal Preparation (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
EL BLANQUEO DE PASTAS DE ORIGEN MECANICO A GRADOS DE BLANCO ELEVADOS CON AYUDA DE PEROXIDO DE HIDROGENO EN MEDIO ALCALINO, EN DOS ETAPAS SUCESIVAS SEPARADAS POR UN LAVADO, EN EL QUE NO SE APELA NI AL SILICATO SODICO NI A UN COMPUESTO DE SIMILAR EFICACIA, EMPLEANDO EN LA PRIMERA ETAPA UNA CANTIDAD DE PEROXIDO DE HIDROGENO COMPRENDIDA ENTRE 0,5 Y 3 % Y, EN LA SEGUNDA ETAPA, UNA CANTIDAD DE PEROXIDO DE HIDROGENO SUPERIOR Y COMPRENDIDA ENTRE 2 Y 5 %.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8714877A FR2622221A1 (fr) | 1987-10-22 | 1987-10-22 | Procede de blanchiment de pates |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2008654A4 true ES2008654A4 (es) | 1989-08-01 |
Family
ID=9356225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES88420339T Pending ES2008654A4 (es) | 1987-10-22 | 1988-10-06 | Procedimiento para blanquear pastas. |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0313478A1 (es) |
JP (1) | JPH0643674B2 (es) |
AU (1) | AU615001B2 (es) |
DE (1) | DE313478T1 (es) |
ES (1) | ES2008654A4 (es) |
FI (1) | FI884881A (es) |
FR (1) | FR2622221A1 (es) |
NO (1) | NO170348C (es) |
NZ (1) | NZ226649A (es) |
PT (1) | PT88819B (es) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2661430B1 (fr) * | 1990-04-30 | 1992-07-17 | Atochem | Procede de blanchiment au peroxyde d'hydrogene de pates a papier a haut rendement. |
US5118389A (en) * | 1990-07-06 | 1992-06-02 | Ici Canada Inc. | Two-stage peroxide bleaching process using different amounts of peroxide on different portions of mechanical pulp |
CA2063351C (en) * | 1992-03-18 | 1996-08-13 | Stanley Alan Heimburger | Process for bleaching hardwood pulp |
US6605181B1 (en) * | 1993-10-01 | 2003-08-12 | Kvaerner Pulping Aktiebolag | Peroxide bleach sequence including an acidic bleach stage and including a wash stage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5679798A (en) * | 1979-12-03 | 1981-06-30 | Mitsubishi Gas Chemical Co | Production of bleaching machine pulp |
JPS5891884A (ja) * | 1981-11-27 | 1983-05-31 | 工業技術院長 | 高白色度未晒パルプの製造方法 |
SE451606B (sv) * | 1982-09-14 | 1987-10-19 | Sca Development Ab | Sett vid blekning av hogutbytesmassor medelst peroxider |
CA1249402A (en) * | 1984-12-21 | 1989-01-31 | Pulp And Paper Research Institute Of Canada | Multistage brightening of high yield and ultra high- yield wood pulps |
EP0191756B1 (en) * | 1985-02-15 | 1989-01-04 | Kamyr Ab | Multi peroxide stage mechanical pulp bleaching |
FR2582692B1 (fr) * | 1985-05-29 | 1987-12-11 | Atochem | Traitement de pates papetieres chimiques par le peroxyde d'hydrogene en vue de leur blanchiment |
FR2593527B1 (fr) * | 1986-01-30 | 1988-03-25 | Centre Tech Ind Papier | Procede de blanchiment des pates mecaniques. |
-
1987
- 1987-10-22 FR FR8714877A patent/FR2622221A1/fr not_active Withdrawn
-
1988
- 1988-10-06 EP EP19880420339 patent/EP0313478A1/fr not_active Withdrawn
- 1988-10-06 ES ES88420339T patent/ES2008654A4/es active Pending
- 1988-10-06 DE DE198888420339T patent/DE313478T1/de active Pending
- 1988-10-20 NO NO884674A patent/NO170348C/no unknown
- 1988-10-20 JP JP63265221A patent/JPH0643674B2/ja not_active Expired - Lifetime
- 1988-10-20 NZ NZ226649A patent/NZ226649A/xx unknown
- 1988-10-21 AU AU24130/88A patent/AU615001B2/en not_active Ceased
- 1988-10-21 FI FI884881A patent/FI884881A/fi not_active Application Discontinuation
- 1988-10-21 PT PT88819A patent/PT88819B/pt active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
NZ226649A (en) | 1989-10-27 |
AU615001B2 (en) | 1991-09-19 |
FI884881A (fi) | 1989-04-23 |
NO170348C (no) | 1992-10-07 |
AU2413088A (en) | 1989-04-27 |
JPH0643674B2 (ja) | 1994-06-08 |
EP0313478A1 (fr) | 1989-04-26 |
JPH01124696A (ja) | 1989-05-17 |
DE313478T1 (de) | 1989-10-05 |
NO884674L (no) | 1989-04-24 |
PT88819B (pt) | 1993-01-29 |
NO884674D0 (no) | 1988-10-20 |
FR2622221A1 (fr) | 1989-04-28 |
FI884881A0 (fi) | 1988-10-21 |
NO170348B (no) | 1992-06-29 |
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