SE8700313L - PROCEDURE FOR WHEATING OF MECHANICAL MASSES - Google Patents
PROCEDURE FOR WHEATING OF MECHANICAL MASSESInfo
- Publication number
- SE8700313L SE8700313L SE8700313A SE8700313A SE8700313L SE 8700313 L SE8700313 L SE 8700313L SE 8700313 A SE8700313 A SE 8700313A SE 8700313 A SE8700313 A SE 8700313A SE 8700313 L SE8700313 L SE 8700313L
- Authority
- SE
- Sweden
- Prior art keywords
- wheating
- procedure
- hydrogen peroxide
- mechanical masses
- masses
- Prior art date
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
Abstract
Process for bleaching mechanical pulp with the aid of hydrogen peroxide, characterised in that the mechanical pulp is subjected to the action of hydrogen peroxide in an acidic medium in the absence of the complexant, and is then bleached by means of hydrogen peroxide in an alkaline medium, in the presence of at least one stabiliser for hydrogen peroxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8601465A FR2593527B1 (en) | 1986-01-30 | 1986-01-30 | PROCESS FOR BLEACHING MECHANICAL PASTA. |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8700313D0 SE8700313D0 (en) | 1987-01-27 |
SE8700313L true SE8700313L (en) | 1987-07-31 |
SE467666B SE467666B (en) | 1992-08-24 |
Family
ID=9331755
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8700313A SE467666B (en) | 1986-01-30 | 1987-01-27 | PROCEDURES FOR WHEATING MECHANICAL MASS WITH WATER PEROXIDE |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS62191589A (en) |
FI (1) | FI87244C (en) |
FR (1) | FR2593527B1 (en) |
SE (1) | SE467666B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2622221A1 (en) * | 1987-10-22 | 1989-04-28 | Atochem | PROCESS FOR BLEACHING PASTA |
US6605181B1 (en) * | 1993-10-01 | 2003-08-12 | Kvaerner Pulping Aktiebolag | Peroxide bleach sequence including an acidic bleach stage and including a wash stage |
DE19516151A1 (en) | 1995-05-03 | 1996-11-07 | Sven Siegle | Process for the production of a pulp from cellulosic material, the pulp itself and its use |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE420430B (en) * | 1978-02-17 | 1981-10-05 | Mo Och Domsjoe Ab | PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS |
US4410397A (en) * | 1978-04-07 | 1983-10-18 | International Paper Company | Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives |
FR2520397A1 (en) * | 1982-01-28 | 1983-07-29 | Centre Tech Ind Papier | PROCESS FOR TREATING CHEMICAL PAPER PASTES |
SE451606B (en) * | 1982-09-14 | 1987-10-19 | Sca Development Ab | VIEW WHITENING OF HOG REPLACEMENT MASSES AVERAGE PEROXIDES |
-
1986
- 1986-01-30 FR FR8601465A patent/FR2593527B1/en not_active Expired
-
1987
- 1987-01-27 SE SE8700313A patent/SE467666B/en not_active IP Right Cessation
- 1987-01-29 FI FI870391A patent/FI87244C/en not_active IP Right Cessation
- 1987-01-30 JP JP2033587A patent/JPS62191589A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
FI870391A0 (en) | 1987-01-29 |
SE467666B (en) | 1992-08-24 |
FI87244C (en) | 1992-12-10 |
FR2593527B1 (en) | 1988-03-25 |
FI87244B (en) | 1992-08-31 |
JPH0156195B2 (en) | 1989-11-29 |
FI870391A (en) | 1987-07-31 |
SE8700313D0 (en) | 1987-01-27 |
JPS62191589A (en) | 1987-08-21 |
FR2593527A1 (en) | 1987-07-31 |
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Legal Events
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