JPS6247999B2 - - Google Patents
Info
- Publication number
- JPS6247999B2 JPS6247999B2 JP53130583A JP13058378A JPS6247999B2 JP S6247999 B2 JPS6247999 B2 JP S6247999B2 JP 53130583 A JP53130583 A JP 53130583A JP 13058378 A JP13058378 A JP 13058378A JP S6247999 B2 JPS6247999 B2 JP S6247999B2
- Authority
- JP
- Japan
- Prior art keywords
- pulp
- weight
- mechanical
- wood
- sodium sulfite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229920001131 Pulp (paper) Polymers 0.000 claims description 46
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 28
- 235000010265 sodium sulphite Nutrition 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 2
- 239000000123 paper Substances 0.000 description 19
- 239000000126 substance Substances 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000006872 improvement Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007670 refining Methods 0.000 description 6
- 229920005610 lignin Polymers 0.000 description 5
- 230000035484 reaction time Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010297 mechanical methods and process Methods 0.000 description 3
- 230000005226 mechanical processes and functions Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920002522 Wood fibre Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 102100030386 Granzyme A Human genes 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 101001009599 Homo sapiens Granzyme A Proteins 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
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
- D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds
-
- 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
- D21C9/001—Modification of pulp properties
- D21C9/002—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
- D21C9/004—Modification of pulp properties by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives inorganic compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- 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 |
|---|---|---|---|
| CA289,427A CA1071805A (en) | 1977-10-25 | 1977-10-25 | Drainage and wet stretch improvement in mechanical pulps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5473902A JPS5473902A (en) | 1979-06-13 |
| JPS6247999B2 true JPS6247999B2 (fi) | 1987-10-12 |
Family
ID=4109848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13058378A Granted JPS5473902A (en) | 1977-10-25 | 1978-10-25 | Treatment of machined pulp |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS5473902A (fi) |
| CA (1) | CA1071805A (fi) |
| FI (1) | FI74051C (fi) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4502918A (en) * | 1981-06-10 | 1985-03-05 | Macmillan Bloedel Limited | Two-stage chemical treatment of mechanical wood pulp with sodium sulfite |
| US4708771A (en) * | 1984-12-31 | 1987-11-24 | Bear Island Paper Company | Two stage process for sulfonating mechanical pulp fibers |
| US4731160A (en) * | 1986-03-19 | 1988-03-15 | Kamyr, Inc. | Drainage characteristics of mechanical pulp |
| US5169496A (en) * | 1991-04-23 | 1992-12-08 | International Paper Company | Method of producing multi-ply paper and board products exhibiting increased stiffness |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4838328A (fi) * | 1971-09-17 | 1973-06-06 | ||
| US3773610A (en) * | 1970-12-11 | 1973-11-20 | Bauer Bros Co | Pressurized system for pulp refining including pressurized double disk treatment |
| JPS5214322A (en) * | 1975-07-25 | 1977-02-03 | Hitachi Ltd | Data processing unit |
| JPS5314806A (en) * | 1976-07-19 | 1978-02-09 | Crown Zellerbach Corp | Process for making thermal * mechanical pulp with high strength and yield * composed of metamorphosed sulfites and liner boards made thereof |
-
1977
- 1977-10-25 CA CA289,427A patent/CA1071805A/en not_active Expired
-
1978
- 1978-10-20 FI FI783200A patent/FI74051C/fi not_active IP Right Cessation
- 1978-10-25 JP JP13058378A patent/JPS5473902A/ja active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3773610A (en) * | 1970-12-11 | 1973-11-20 | Bauer Bros Co | Pressurized system for pulp refining including pressurized double disk treatment |
| JPS4838328A (fi) * | 1971-09-17 | 1973-06-06 | ||
| JPS5214322A (en) * | 1975-07-25 | 1977-02-03 | Hitachi Ltd | Data processing unit |
| JPS5314806A (en) * | 1976-07-19 | 1978-02-09 | Crown Zellerbach Corp | Process for making thermal * mechanical pulp with high strength and yield * composed of metamorphosed sulfites and liner boards made thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5473902A (en) | 1979-06-13 |
| FI74051C (fi) | 1988-11-28 |
| CA1071805A (en) | 1980-02-19 |
| FI783200A (fi) | 1979-04-26 |
| FI74051B (fi) | 1987-08-31 |
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