SE8207356D0 - PROCEDE POUR LE TRAITEMENT DE PATES PAPETIERES CHIMIQUES - Google Patents
PROCEDE POUR LE TRAITEMENT DE PATES PAPETIERES CHIMIQUESInfo
- Publication number
- SE8207356D0 SE8207356D0 SE8207356A SE8207356A SE8207356D0 SE 8207356 D0 SE8207356 D0 SE 8207356D0 SE 8207356 A SE8207356 A SE 8207356A SE 8207356 A SE8207356 A SE 8207356A SE 8207356 D0 SE8207356 D0 SE 8207356D0
- Authority
- SE
- Sweden
- Prior art keywords
- papetieres
- pates
- chimiques
- traitement
- procede pour
- 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
-
- 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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
When paper pulp is bleached with an alkaline peroxide solution and pretreated with an acid solution, it has been found that, while preserving the mechanical properties of the pulp, its lignin content is considerably reduced if the treatment with the acid solution is carried out at temperatures of at least 50 DEG C.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8201603A FR2520397A1 (en) | 1982-01-28 | 1982-01-28 | PROCESS FOR TREATING CHEMICAL PAPER PASTES |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8207356D0 true SE8207356D0 (en) | 1982-12-22 |
SE8207356L SE8207356L (en) | 1983-07-29 |
SE462288B SE462288B (en) | 1990-05-28 |
Family
ID=9270561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8207356A SE462288B (en) | 1982-01-28 | 1982-12-22 | TREATMENT OF CHEMICAL MASSES IN AN ACID STEP FOR PEROXIDE TREATMENT |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPS58132190A (en) |
KR (1) | KR850001341B1 (en) |
AT (1) | AT381736B (en) |
BE (1) | BE895645A (en) |
BR (1) | BR8300402A (en) |
CA (1) | CA1206704A (en) |
CH (1) | CH653720A5 (en) |
DE (1) | DE3302580A1 (en) |
ES (1) | ES8400520A1 (en) |
FI (1) | FI76134C (en) |
FR (1) | FR2520397A1 (en) |
IT (1) | IT1162810B (en) |
NO (1) | NO161391C (en) |
OA (1) | OA07313A (en) |
PT (1) | PT76145B (en) |
SE (1) | SE462288B (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1227304A (en) * | 1984-08-01 | 1987-09-29 | Raymond C. Francis | Delignification of pulp |
FR2593527B1 (en) * | 1986-01-30 | 1988-03-25 | Centre Tech Ind Papier | PROCESS FOR BLEACHING MECHANICAL PASTA. |
EP0402335B2 (en) * | 1989-06-06 | 2001-03-14 | Eka Chemicals AB | Process for bleaching lignocellulose-containing pulps |
US5246543A (en) * | 1989-08-18 | 1993-09-21 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic materials |
US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
DE3937932A1 (en) * | 1989-11-15 | 1991-05-16 | Holtzmann & Cie Ag E | Delignification and bleaching of pulp with alkali chlorite - by adding chlorite before acidification to produce nascent reagent, minimising pollution |
SE466061B (en) * | 1990-04-23 | 1991-12-09 | Eka Nobel Ab | Bleaching of chemical pulp by treatment with first a complexing agent and then a peroxide containing substance |
SE9001481L (en) * | 1990-04-23 | 1991-10-24 | Eka Nobel Ab | REDUCTION OF HALOGEN ORGANIC SUBSTANCES IN BLEACHING WASTE |
US6398908B1 (en) | 1991-04-30 | 2002-06-04 | Eka Nobel Ab | Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound |
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 |
SE500113C2 (en) * | 1992-07-09 | 1994-04-18 | Kamyr Ab | Method of bleaching pulp for disposal of released metals |
SE512137C2 (en) * | 1992-10-29 | 2000-01-31 | Eka Chemicals Ab | Process for bleaching lignocellulosic pulp |
SE500616C2 (en) * | 1993-06-08 | 1994-07-25 | Kvaerner Pulping Tech | Bleaching of chemical pulp with peroxide at overpressure |
US6776876B1 (en) | 1994-10-13 | 2004-08-17 | Andritz Oy | Method of treating cellulosic pulp to remove hexenuronic acid |
EP0858526A1 (en) * | 1995-02-17 | 1998-08-19 | Ahlstrom Machinery Oy | Method of pretreating pulp to be bleached with peroxide |
SE526241C2 (en) * | 2003-12-18 | 2005-08-02 | Metso Paper Inc | Procedure for acidifying lignocellulosic pulp before ozone bleaching |
US8080560B2 (en) | 2004-12-17 | 2011-12-20 | 3M Innovative Properties Company | Immune response modifier formulations containing oleic acid and methods |
US8889154B2 (en) | 2005-09-15 | 2014-11-18 | Medicis Pharmaceutical Corporation | Packaging for 1-(2-methylpropyl)-1H-imidazo[4,5-c] quinolin-4-amine-containing formulation |
US8980051B2 (en) | 2009-04-24 | 2015-03-17 | International Paper Company | Sulfonation of pulp produced by alkali pulping process |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1705897A (en) * | 1922-03-16 | 1929-03-19 | Bradley Linn | Bleaching of pulp |
FR1010501A (en) * | 1948-08-31 | 1952-06-12 | Papiers Abadie Sa Des | Cellulose pulp bleaching process |
US2668095A (en) * | 1950-09-22 | 1954-02-02 | Du Pont | Bleaching chemical paper pulp |
FR1201712A (en) * | 1958-07-11 | 1960-01-05 | Fr Du Xylon Soc | Cellulose pulp bleaching improvements |
JPS51102103A (en) * | 1975-03-05 | 1976-09-09 | Nippon Parupu Kogyo Kk | Ryusanenhoparupuno hyohakuhoho |
FR2398839A1 (en) * | 1977-07-29 | 1979-02-23 | Centre Tech Ind Papier | Kraft type paper pulp prepn. without sulphur pollutants - by treating shavings with sodium hydroxide followed by stabilised peroxide |
DE2742262C2 (en) * | 1977-09-20 | 1982-06-09 | Degussa Ag, 6000 Frankfurt | Process for the production of a medium to high viscosity softwood sulphite pulp |
JPS5685489A (en) * | 1979-12-10 | 1981-07-11 | Kogyo Gijutsuin | Pulp production |
-
1982
- 1982-01-28 FR FR8201603A patent/FR2520397A1/en active Granted
- 1982-12-22 SE SE8207356A patent/SE462288B/en unknown
- 1982-12-23 KR KR8205769A patent/KR850001341B1/en active
-
1983
- 1983-01-07 IT IT67014/83A patent/IT1162810B/en active
- 1983-01-19 BE BE0/209926A patent/BE895645A/en not_active IP Right Cessation
- 1983-01-25 CA CA000420203A patent/CA1206704A/en not_active Expired
- 1983-01-26 DE DE19833302580 patent/DE3302580A1/en active Granted
- 1983-01-26 PT PT76145A patent/PT76145B/en not_active IP Right Cessation
- 1983-01-27 CH CH463/83A patent/CH653720A5/en not_active IP Right Cessation
- 1983-01-27 FI FI830288A patent/FI76134C/en not_active IP Right Cessation
- 1983-01-27 ES ES519327A patent/ES8400520A1/en not_active Expired
- 1983-01-27 AT AT0026383A patent/AT381736B/en not_active IP Right Cessation
- 1983-01-27 NO NO830268A patent/NO161391C/en unknown
- 1983-01-27 BR BR8300402A patent/BR8300402A/en not_active IP Right Cessation
- 1983-01-28 JP JP58011603A patent/JPS58132190A/en active Granted
- 1983-01-28 OA OA57907A patent/OA07313A/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2520397A1 (en) | 1983-07-29 |
BE895645A (en) | 1983-07-19 |
BR8300402A (en) | 1983-11-01 |
IT1162810B (en) | 1987-04-01 |
PT76145B (en) | 1985-11-25 |
KR840002934A (en) | 1984-07-21 |
JPS58132190A (en) | 1983-08-06 |
NO161391C (en) | 1989-08-09 |
FI830288A0 (en) | 1983-01-27 |
OA07313A (en) | 1984-08-31 |
FI76134C (en) | 1988-09-09 |
ES519327A0 (en) | 1983-10-16 |
ATA26383A (en) | 1986-04-15 |
SE462288B (en) | 1990-05-28 |
SE8207356L (en) | 1983-07-29 |
CA1206704A (en) | 1986-07-02 |
KR850001341B1 (en) | 1985-09-19 |
DE3302580A1 (en) | 1983-08-04 |
JPH0217679B2 (en) | 1990-04-23 |
DE3302580C2 (en) | 1992-07-02 |
CH653720A5 (en) | 1986-01-15 |
FI76134B (en) | 1988-05-31 |
FR2520397B1 (en) | 1984-03-09 |
NO830268L (en) | 1983-07-29 |
PT76145A (en) | 1983-02-01 |
NO161391B (en) | 1989-05-02 |
FI830288L (en) | 1983-07-29 |
IT8367014A0 (en) | 1983-01-07 |
ES8400520A1 (en) | 1983-10-16 |
AT381736B (en) | 1986-11-25 |
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Legal Events
Date | Code | Title | Description |
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NAL | Patent in force |
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