NO863132D0 - PROCEDURE FOR DELIGNIFICATION OF CELLULOUS SUBSTANCES. - Google Patents
PROCEDURE FOR DELIGNIFICATION OF CELLULOUS SUBSTANCES.Info
- Publication number
- NO863132D0 NO863132D0 NO863132A NO863132A NO863132D0 NO 863132 D0 NO863132 D0 NO 863132D0 NO 863132 A NO863132 A NO 863132A NO 863132 A NO863132 A NO 863132A NO 863132 D0 NO863132 D0 NO 863132D0
- Authority
- NO
- Norway
- Prior art keywords
- delignification
- cellulous
- substances
- procedure
- cellulosic materials
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
Landscapes
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Dental Preparations (AREA)
- Organic Insulating Materials (AREA)
- Materials For Medical Uses (AREA)
- External Artificial Organs (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Detergent Compositions (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Cleaning Or Drying Semiconductors (AREA)
Abstract
1. Process for the delignification of cellulosic materials characterized in that in a first step the cellulosic materials are treated with an acid under regulated conditions to effect a decontamination of the cellulosic material of the metals which they contain, in a second step the cellulosic materials of the first step are treated with hydrogen peroxyde under alcaline conditions and in a third step the cellulosic materials of the second step are boiled in the presence of sulphite or sulphate.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76272485A | 1985-08-05 | 1985-08-05 |
Publications (4)
Publication Number | Publication Date |
---|---|
NO863132D0 true NO863132D0 (en) | 1986-08-04 |
NO863132L NO863132L (en) | 1987-02-06 |
NO168375B NO168375B (en) | 1991-11-04 |
NO168375C NO168375C (en) | 1992-02-12 |
Family
ID=25065878
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO863132A NO168375C (en) | 1985-08-05 | 1986-08-04 | PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-CONTAINING MATERIAL |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0213376B1 (en) |
JP (1) | JPH0742669B2 (en) |
AT (1) | ATE57401T1 (en) |
AU (1) | AU591508B2 (en) |
BR (1) | BR8603671A (en) |
CA (1) | CA1282911C (en) |
DE (1) | DE3674866D1 (en) |
ES (1) | ES2000831A6 (en) |
FI (1) | FI85725C (en) |
IN (1) | IN167959B (en) |
NO (1) | NO168375C (en) |
NZ (1) | NZ217001A (en) |
PT (1) | PT83117B (en) |
YU (1) | YU45352B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU591509B2 (en) * | 1985-08-05 | 1989-12-07 | Interox Societe Anonyme | Process for the delignification of cellulosic substances |
FI122654B (en) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Process for making paper cellulose pulp |
WO2008141463A1 (en) * | 2007-05-23 | 2008-11-27 | Alberta Research Council Inc. | Method to remove hemicellutose from cellutosic fibres using a solution of ammonia and hydrogen peroxide |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE873649C (en) * | 1944-08-25 | 1953-04-16 | Degussa | Process for the production of unbleached cellulose with a high white content |
SE373896B (en) * | 1972-07-05 | 1975-02-17 | Mo Och Domsjoe Ab | |
SE380298B (en) * | 1974-03-14 | 1975-11-03 | Mo | PROCEDURE FOR DELIGNIFICATION BY ACID-ALKALI TREATMENT OF LIGNOCELLUOSA-CONTAINING MATERIAL |
US4486267A (en) * | 1983-11-14 | 1984-12-04 | Mead Corporation | Chemithermomechanical pulping process employing separate alkali and sulfite treatments |
AU591509B2 (en) * | 1985-08-05 | 1989-12-07 | Interox Societe Anonyme | Process for the delignification of cellulosic substances |
-
1986
- 1986-07-18 IN IN647/DEL/86A patent/IN167959B/en unknown
- 1986-07-25 DE DE8686110249T patent/DE3674866D1/en not_active Expired - Fee Related
- 1986-07-25 AT AT86110249T patent/ATE57401T1/en not_active IP Right Cessation
- 1986-07-25 AU AU60543/86A patent/AU591508B2/en not_active Ceased
- 1986-07-25 EP EP86110249A patent/EP0213376B1/en not_active Expired - Lifetime
- 1986-07-28 NZ NZ217001A patent/NZ217001A/en unknown
- 1986-07-31 YU YU1370/86A patent/YU45352B/en unknown
- 1986-08-01 PT PT83117A patent/PT83117B/en not_active IP Right Cessation
- 1986-08-01 CA CA000515198A patent/CA1282911C/en not_active Expired - Lifetime
- 1986-08-04 JP JP61183261A patent/JPH0742669B2/en not_active Expired - Lifetime
- 1986-08-04 ES ES868600839A patent/ES2000831A6/en not_active Expired
- 1986-08-04 NO NO863132A patent/NO168375C/en not_active IP Right Cessation
- 1986-08-04 BR BR8603671A patent/BR8603671A/en not_active IP Right Cessation
- 1986-08-05 FI FI863193A patent/FI85725C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NZ217001A (en) | 1989-01-27 |
ES2000831A6 (en) | 1988-03-16 |
NO168375C (en) | 1992-02-12 |
NO863132L (en) | 1987-02-06 |
JPS6297991A (en) | 1987-05-07 |
JPH0742669B2 (en) | 1995-05-10 |
YU45352B (en) | 1992-05-28 |
FI85725C (en) | 1992-05-25 |
IN167959B (en) | 1991-01-12 |
EP0213376A1 (en) | 1987-03-11 |
FI863193A (en) | 1987-02-06 |
AU6054386A (en) | 1987-02-12 |
PT83117B (en) | 1988-10-14 |
FI85725B (en) | 1992-02-14 |
AU591508B2 (en) | 1989-12-07 |
CA1282911C (en) | 1991-04-16 |
FI863193A0 (en) | 1986-08-05 |
DE3674866D1 (en) | 1990-11-15 |
NO168375B (en) | 1991-11-04 |
EP0213376B1 (en) | 1990-10-10 |
YU137086A (en) | 1987-10-31 |
ATE57401T1 (en) | 1990-10-15 |
BR8603671A (en) | 1987-03-10 |
PT83117A (en) | 1986-09-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM1K | Lapsed by not paying the annual fees |
Free format text: LAPSED IN FEBRUARY 2002 |