NO853688L - Fremgangsmaate til delignifisering av sulfatcelluloser. - Google Patents
Fremgangsmaate til delignifisering av sulfatcelluloser.Info
- Publication number
- NO853688L NO853688L NO853688A NO853688A NO853688L NO 853688 L NO853688 L NO 853688L NO 853688 A NO853688 A NO 853688A NO 853688 A NO853688 A NO 853688A NO 853688 L NO853688 L NO 853688L
- Authority
- NO
- Norway
- Prior art keywords
- oxygen
- delignification
- cellulose
- hydrogen peroxide
- weight
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title claims abstract description 9
- 229920002678 cellulose Polymers 0.000 title claims description 32
- 229910021653 sulphate ion Inorganic materials 0.000 title description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000007935 neutral effect Effects 0.000 claims abstract description 3
- 235000010980 cellulose Nutrition 0.000 claims description 31
- 239000001913 cellulose Substances 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 3
- 241000294754 Macroptilium atropurpureum Species 0.000 claims description 2
- 230000002378 acidificating effect Effects 0.000 description 5
- 235000011121 sodium hydroxide Nutrition 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 229920005610 lignin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 208000010668 atopic eczema Diseases 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 125000000837 carbohydrate group Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004182 chemical digestion Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 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
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- External Artificial Organs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843446301 DE3446301A1 (de) | 1984-12-19 | 1984-12-19 | Verfahren zur delignifizierung von sulfatzellstoffen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO853688L true NO853688L (no) | 1986-06-20 |
Family
ID=6253194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO853688A NO853688L (no) | 1984-12-19 | 1985-09-20 | Fremgangsmaate til delignifisering av sulfatcelluloser. |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0185858B1 (fi) |
| JP (1) | JPS61146894A (fi) |
| AT (1) | ATE33998T1 (fi) |
| DE (2) | DE3446301A1 (fi) |
| FI (1) | FI853492L (fi) |
| NO (1) | NO853688L (fi) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0863251A1 (en) * | 1997-03-04 | 1998-09-09 | Oji Paper Co., Ltd. | Process for producing bleached pulp |
| US5919238A (en) * | 1998-03-04 | 1999-07-06 | Ford Global Technologies, Inc. | Method for aligning a vehicle suspension |
| US10243028B2 (en) | 2014-04-08 | 2019-03-26 | Panasonic Intellectual Property Management Co., Ltd. | Organic electroluminescent element and lighting device with buffer layer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3719552A (en) * | 1971-06-18 | 1973-03-06 | American Cyanamid Co | Bleaching of lignocellulosic materials with oxygen in the presence of a peroxide |
| SE420430B (sv) * | 1978-02-17 | 1981-10-05 | Mo Och Domsjoe Ab | Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel |
| US4372812A (en) * | 1978-04-07 | 1983-02-08 | International Paper Company | Chlorine free process for bleaching lignocellulosic pulp |
| EP0088073A4 (en) * | 1981-09-04 | 1984-01-09 | Weyerhaeuser Co | METHOD FOR TREATING PULP WITH MULTIPLE OXYGEN LEVELS. |
| DE3207157C1 (de) * | 1982-02-27 | 1983-06-09 | Degussa Ag, 6000 Frankfurt | Verfahren zur Herstellung von halbgebleichten Zellstoffen |
-
1984
- 1984-12-19 DE DE19843446301 patent/DE3446301A1/de not_active Withdrawn
-
1985
- 1985-09-12 FI FI853492A patent/FI853492L/fi not_active Application Discontinuation
- 1985-09-20 NO NO853688A patent/NO853688L/no unknown
- 1985-09-25 AT AT85112163T patent/ATE33998T1/de active
- 1985-09-25 EP EP85112163A patent/EP0185858B1/de not_active Expired
- 1985-09-25 DE DE8585112163T patent/DE3562496D1/de not_active Expired
- 1985-12-16 JP JP60281267A patent/JPS61146894A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE3562496D1 (en) | 1988-06-09 |
| ATE33998T1 (de) | 1988-05-15 |
| FI853492A0 (fi) | 1985-09-12 |
| JPS61146894A (ja) | 1986-07-04 |
| EP0185858B1 (de) | 1988-05-04 |
| EP0185858A1 (de) | 1986-07-02 |
| DE3446301A1 (de) | 1986-06-19 |
| FI853492L (fi) | 1986-06-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5310458A (en) | Process for bleaching lignocellulose-containing pulps | |
| US4661205A (en) | Method of bleaching lignocellulosic material with peroxide catalyzed with a salt of a metal | |
| US3865685A (en) | Multiple step bleaching of cellulose with a per compound and chloride dioxide | |
| CA2363793A1 (en) | Method to improve pulp yield and bleachability of lignocellulosic pulps | |
| US4091749A (en) | Alkaline pulping of lignocellulosic material with amine pretreatment | |
| US5085734A (en) | Methods of high consistency oxygen delignification using a low consistency alkali pretreatment | |
| US5173153A (en) | Process for enhanced oxygen delignification using high consistency and a split alkali addition | |
| US4560437A (en) | Process for delignification of chemical wood pulp using sodium sulphite or bisulphite prior to oxygen-alkali treatment | |
| US5766415A (en) | Process for delignification and bleaching of chemical wood pulps with peroxide and dicyandiamide activator | |
| RU2439232C2 (ru) | Способ отбеливания бумажной целлюлозной массы путем конечной обработки озоном при высокой температуре | |
| EP0442806A1 (en) | A process for producing pulp from a lignocellulosic-containing material | |
| US3532597A (en) | Preparation of dissolving pulps from wood by hydrolysis and alkaline sulfite digestion | |
| US3884752A (en) | Single vessel wood pulp bleaching with chlorine dioxide followed by sodium hypochlorite or alkaline extraction | |
| NO853688L (no) | Fremgangsmaate til delignifisering av sulfatcelluloser. | |
| US5217574A (en) | Process for oxygen delignifying high consistency pulp by removing and recycling pressate from alkaline pulp | |
| US4579628A (en) | Process for chlorine bleaching of kraft pulp using a sulfite extraction stage | |
| Roncero et al. | Application of post-treatments to the ozone bleaching of eucalypt kraft pulp to increase the selectivity. Part A | |
| US20030168190A1 (en) | Method for controlling the delignfication and bleaching of a pulp suspension | |
| Abad et al. | Totally chlorine free bleaching of Eucalyptus globulus dissolving pulps delignified with peroxyformic acid and formic acid | |
| US4526651A (en) | Process for oxygen bleaching paper pulp using melamine as a viscosity stabilizer | |
| EP0279845A4 (en) | Pulp bleaching process | |
| WO1997017489A1 (en) | Process for oxygen delignification | |
| JPH06501290A (ja) | 高コンシステンシー酸素脱リグニンのためのパルプアルカリ添加法 | |
| US1858523A (en) | Process of chemically treating and bleaching cellulose pulp | |
| NZ232530A (en) | Alkaline process for bleaching and delignifying wood or pulp |