NO743539L - - Google Patents
Info
- Publication number
- NO743539L NO743539L NO743539A NO743539A NO743539L NO 743539 L NO743539 L NO 743539L NO 743539 A NO743539 A NO 743539A NO 743539 A NO743539 A NO 743539A NO 743539 L NO743539 L NO 743539L
- Authority
- NO
- Norway
- Prior art keywords
- aqueous medium
- alkaline aqueous
- delignification
- cellulose material
- oxygen
- Prior art date
Links
- 239000000463 material Substances 0.000 claims description 62
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 58
- 239000001301 oxygen Substances 0.000 claims description 58
- 229910052760 oxygen Inorganic materials 0.000 claims description 58
- 239000012736 aqueous medium Substances 0.000 claims description 47
- 229920002678 cellulose Polymers 0.000 claims description 46
- 239000001913 cellulose Substances 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 41
- 238000006243 chemical reaction Methods 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 239000002609 medium Substances 0.000 claims description 23
- 229920005610 lignin Polymers 0.000 claims description 16
- 239000002023 wood Substances 0.000 claims description 11
- 229920001131 Pulp (paper) Polymers 0.000 claims description 10
- 230000001590 oxidative effect Effects 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000005054 agglomeration Methods 0.000 claims description 5
- 230000002776 aggregation Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 26
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 13
- 239000000243 solution Substances 0.000 description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 230000035484 reaction time Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000004061 bleaching Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000016507 interphase Effects 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 3
- 229910001948 sodium oxide Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 235000011613 Pinus brutia Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000002655 kraft paper Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012737 fresh medium Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000005406 washing Methods 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
- D21C9/1068—Bleaching ; Apparatus therefor with O2
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49019287A JPS5241361B2 (fi) | 1974-02-18 | 1974-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO743539L true NO743539L (fi) | 1975-08-19 |
Family
ID=11995220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO743539A NO743539L (fi) | 1974-02-18 | 1974-09-30 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5241361B2 (fi) |
| BR (1) | BR7408260A (fi) |
| CA (1) | CA1036758A (fi) |
| FI (1) | FI56710C (fi) |
| FR (1) | FR2261371B1 (fi) |
| GB (1) | GB1489222A (fi) |
| IT (1) | IT1022768B (fi) |
| NO (1) | NO743539L (fi) |
| SE (1) | SE411464B (fi) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52148201A (en) * | 1976-06-01 | 1977-12-09 | Toyo Pulp Co Ltd | Process for making alkali pulp and lignin separation |
-
1974
- 1974-02-18 JP JP49019287A patent/JPS5241361B2/ja not_active Expired
- 1974-09-30 NO NO743539A patent/NO743539L/no unknown
- 1974-09-30 CA CA210,399A patent/CA1036758A/en not_active Expired
- 1974-09-30 SE SE7412272A patent/SE411464B/xx unknown
- 1974-10-04 BR BR8260/74A patent/BR7408260A/pt unknown
- 1974-10-08 GB GB43506/74A patent/GB1489222A/en not_active Expired
- 1974-10-10 IT IT28290/74A patent/IT1022768B/it active
- 1974-10-15 FI FI3013/74A patent/FI56710C/fi active
- 1974-10-24 FR FR7435643A patent/FR2261371B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FI56710B (fi) | 1979-11-30 |
| DE2450608B2 (de) | 1976-04-15 |
| IT1022768B (it) | 1978-04-20 |
| JPS50112501A (fi) | 1975-09-04 |
| DE2450608A1 (de) | 1975-08-21 |
| FR2261371A1 (fi) | 1975-09-12 |
| AU7383574A (en) | 1976-04-08 |
| JPS5241361B2 (fi) | 1977-10-18 |
| SE411464B (sv) | 1979-12-27 |
| SE7412272L (fi) | 1975-08-19 |
| FI301374A (fi) | 1975-08-19 |
| FI56710C (fi) | 1981-07-27 |
| FR2261371B1 (fi) | 1977-10-28 |
| BR7408260A (pt) | 1976-04-27 |
| CA1036758A (en) | 1978-08-22 |
| GB1489222A (en) | 1977-10-19 |
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