BR8603671A - PROCESS FOR THE DESIGNIFICATION OF CELLULOSIC MATERIALS - Google Patents
PROCESS FOR THE DESIGNIFICATION OF CELLULOSIC MATERIALSInfo
- Publication number
- BR8603671A BR8603671A BR8603671A BR8603671A BR8603671A BR 8603671 A BR8603671 A BR 8603671A BR 8603671 A BR8603671 A BR 8603671A BR 8603671 A BR8603671 A BR 8603671A BR 8603671 A BR8603671 A BR 8603671A
- Authority
- BR
- Brazil
- Prior art keywords
- cellulosic materials
- designification
- cellulosic
- treated
- conditions
- Prior art date
Links
- 239000000463 material Substances 0.000 title abstract 6
- 238000000034 method Methods 0.000 title abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000005202 decontamination Methods 0.000 abstract 1
- 230000003588 decontaminative effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 1
- 229910021653 sulphate ion 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
- 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)
- Organic Insulating Materials (AREA)
- Dental Preparations (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Materials For Medical Uses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- External Artificial Organs (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Detergent Compositions (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 (1)
| Publication Number | Publication Date |
|---|---|
| BR8603671A true BR8603671A (en) | 1987-03-10 |
Family
ID=25065878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR8603671A BR8603671A (en) | 1985-08-05 | 1986-08-04 | PROCESS FOR THE DESIGNIFICATION OF CELLULOSIC MATERIALS |
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 |
|---|---|---|---|---|
| DE3674859D1 (en) * | 1985-08-05 | 1990-11-15 | Interox Sa | METHOD FOR DELIGNIFYING CELLULOSE MATERIALS. |
| FI122654B (en) * | 1997-12-08 | 2012-05-15 | Ovivo Luxembourg Sarl | Process for making paper cellulose pulp |
| JP5467041B2 (en) * | 2007-05-23 | 2014-04-09 | アルバータ イノヴェイツ−テクノロジー フューチャーズ | Cellulose fiber degumming method |
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 |
| DE3674859D1 (en) * | 1985-08-05 | 1990-11-15 | Interox Sa | METHOD FOR DELIGNIFYING CELLULOSE MATERIALS. |
-
1986
- 1986-07-18 IN IN647/DEL/86A patent/IN167959B/en unknown
- 1986-07-25 EP EP86110249A patent/EP0213376B1/en not_active Expired - Lifetime
- 1986-07-25 AT AT86110249T patent/ATE57401T1/en not_active IP Right Cessation
- 1986-07-25 DE DE8686110249T patent/DE3674866D1/en not_active Expired - Fee Related
- 1986-07-25 AU AU60543/86A patent/AU591508B2/en not_active Ceased
- 1986-07-28 NZ NZ217001A patent/NZ217001A/en unknown
- 1986-07-31 YU YU1370/86A patent/YU45352B/en unknown
- 1986-08-01 CA CA000515198A patent/CA1282911C/en not_active Expired - Lifetime
- 1986-08-01 PT PT83117A patent/PT83117B/en not_active IP Right Cessation
- 1986-08-04 ES ES868600839A patent/ES2000831A6/en not_active Expired
- 1986-08-04 BR BR8603671A patent/BR8603671A/en not_active IP Right Cessation
- 1986-08-04 JP JP61183261A patent/JPH0742669B2/en not_active Expired - Lifetime
- 1986-08-04 NO NO863132A patent/NO168375C/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 |
|---|---|
| EP0213376B1 (en) | 1990-10-10 |
| AU591508B2 (en) | 1989-12-07 |
| NO168375C (en) | 1992-02-12 |
| CA1282911C (en) | 1991-04-16 |
| PT83117B (en) | 1988-10-14 |
| EP0213376A1 (en) | 1987-03-11 |
| NO863132D0 (en) | 1986-08-04 |
| PT83117A (en) | 1986-09-01 |
| IN167959B (en) | 1991-01-12 |
| NO863132L (en) | 1987-02-06 |
| JPS6297991A (en) | 1987-05-07 |
| FI85725C (en) | 1992-05-25 |
| DE3674866D1 (en) | 1990-11-15 |
| YU137086A (en) | 1987-10-31 |
| NO168375B (en) | 1991-11-04 |
| AU6054386A (en) | 1987-02-12 |
| ATE57401T1 (en) | 1990-10-15 |
| FI863193L (en) | 1987-02-06 |
| ES2000831A6 (en) | 1988-03-16 |
| YU45352B (en) | 1992-05-28 |
| FI863193A0 (en) | 1986-08-05 |
| NZ217001A (en) | 1989-01-27 |
| JPH0742669B2 (en) | 1995-05-10 |
| FI85725B (en) | 1992-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B21A | Patent or certificate of addition expired [chapter 21.1 patent gazette] |
Free format text: PATENTE EXTINTA EM 04/08/2001 |