CA1051246A - Method of producing mechanical pulp - Google Patents
Method of producing mechanical pulpInfo
- Publication number
- CA1051246A CA1051246A CA246,370A CA246370A CA1051246A CA 1051246 A CA1051246 A CA 1051246A CA 246370 A CA246370 A CA 246370A CA 1051246 A CA1051246 A CA 1051246A
- Authority
- CA
- Canada
- Prior art keywords
- chips
- alkali
- impregnated
- solution
- raw material
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229920001131 Pulp (paper) Polymers 0.000 title abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 34
- 150000002978 peroxides Chemical class 0.000 claims abstract description 28
- 239000000243 solution Substances 0.000 claims abstract description 19
- 239000002023 wood Substances 0.000 claims abstract description 18
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 9
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 4
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims abstract description 3
- 230000006835 compression Effects 0.000 claims abstract description 3
- 238000007906 compression Methods 0.000 claims abstract description 3
- 150000001875 compounds Chemical class 0.000 claims abstract 4
- 150000004679 hydroxides Chemical class 0.000 claims abstract 2
- 238000004061 bleaching Methods 0.000 claims description 38
- 239000000126 substance Substances 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 30
- 239000002994 raw material Substances 0.000 claims description 12
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 235000010269 sulphur dioxide Nutrition 0.000 claims description 3
- 239000004291 sulphur dioxide Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 claims 2
- 238000006731 degradation reaction Methods 0.000 claims 2
- 208000036366 Sensation of pressure Diseases 0.000 claims 1
- 230000002596 correlated effect Effects 0.000 claims 1
- 238000000227 grinding Methods 0.000 abstract description 24
- 239000002657 fibrous material Substances 0.000 abstract description 3
- 239000001913 cellulose Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- -1 on the peroxide Chemical class 0.000 abstract description 2
- 229920002678 cellulose Polymers 0.000 abstract 1
- 230000000593 degrading effect Effects 0.000 abstract 1
- 230000001771 impaired effect Effects 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000007858 starting material Substances 0.000 description 24
- 238000005470 impregnation Methods 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000011282 treatment Methods 0.000 description 7
- 230000014759 maintenance of location Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001603 reducing effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000002671 adjuvant Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 230000002939 deleterious effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- GRWZHXKQBITJKP-UHFFFAOYSA-N dithionous acid Chemical compound OS(=O)S(O)=O GRWZHXKQBITJKP-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- GRYSXUXXBDSYRT-WOUKDFQISA-N (2r,3r,4r,5r)-2-(hydroxymethyl)-4-methoxy-5-[6-(methylamino)purin-9-yl]oxolan-3-ol Chemical compound C1=NC=2C(NC)=NC=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1OC GRYSXUXXBDSYRT-WOUKDFQISA-N 0.000 description 1
- 241000609240 Ambelania acida Species 0.000 description 1
- 235000018185 Betula X alpestris Nutrition 0.000 description 1
- 235000018212 Betula X uliginosa Nutrition 0.000 description 1
- 241000219495 Betulaceae Species 0.000 description 1
- 241001662103 Cryptocarya corrugata Species 0.000 description 1
- 241000196324 Embryophyta Species 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
- 241000219000 Populus Species 0.000 description 1
- 241000183024 Populus tremula Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 229940106135 cellulose Drugs 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000332 continued effect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 102000034240 fibrous proteins Human genes 0.000 description 1
- 108091005899 fibrous proteins Proteins 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/14—Disintegrating in mills
- D21B1/16—Disintegrating in mills in the presence of chemical agents
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7502060A SE7502060L (sv) | 1975-02-24 | 1975-02-24 | Sett vid framstellning av mekanisk pappersmassa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1051246A true CA1051246A (en) | 1979-03-27 |
Family
ID=20323781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA246,370A Expired CA1051246A (en) | 1975-02-24 | 1976-02-23 | Method of producing mechanical pulp |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS51109302A (enrdf_load_stackoverflow) |
| BR (1) | BR7601137A (enrdf_load_stackoverflow) |
| CA (1) | CA1051246A (enrdf_load_stackoverflow) |
| DE (1) | DE2606718C3 (enrdf_load_stackoverflow) |
| FI (1) | FI760469A7 (enrdf_load_stackoverflow) |
| FR (1) | FR2301630A1 (enrdf_load_stackoverflow) |
| NO (1) | NO760586L (enrdf_load_stackoverflow) |
| SE (1) | SE7502060L (enrdf_load_stackoverflow) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI61215B (fi) * | 1976-11-23 | 1982-02-26 | Defibrator Ab | Saett och anordning att kontinuerligt framstaella lignocellulosahaltiga fibermaterial |
| FR2566015B1 (fr) * | 1984-06-15 | 1986-08-29 | Centre Tech Ind Papier | Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene |
| SE8501246L (sv) * | 1985-03-13 | 1986-09-14 | Eka Ab | Sett att tillverka blekt, kemimekanisk och halvkemisk fibermassa med anvendning av enstegsimpregnering |
| DE10114341C2 (de) * | 2001-03-23 | 2003-10-02 | Rettenmaier & Soehne Gmbh & Co | Verfahren zum Vermahlen und Bleichen von cellulosehaltigem Material, dessen Verwendung und das cellulosehaltige Material |
| DE102019008449A1 (de) * | 2019-12-05 | 2021-06-10 | Klingele Papierwerke Gmbh & Co. Kg | Verfahren sowie Vorrichtung zur Herstellung von Faserstoff mit einem Zuführsystem und einem Schneckensystem |
-
1975
- 1975-02-24 SE SE7502060A patent/SE7502060L/xx unknown
-
1976
- 1976-02-19 DE DE2606718A patent/DE2606718C3/de not_active Expired
- 1976-02-23 BR BR7601137A patent/BR7601137A/pt unknown
- 1976-02-23 CA CA246,370A patent/CA1051246A/en not_active Expired
- 1976-02-23 NO NO760586A patent/NO760586L/no unknown
- 1976-02-23 FR FR7604977A patent/FR2301630A1/fr active Granted
- 1976-02-24 FI FI760469A patent/FI760469A7/fi not_active Application Discontinuation
- 1976-02-24 JP JP51018579A patent/JPS51109302A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2606718B2 (de) | 1978-01-26 |
| DE2606718A1 (de) | 1976-09-02 |
| FR2301630A1 (fr) | 1976-09-17 |
| DE2606718C3 (de) | 1978-10-05 |
| BR7601137A (pt) | 1976-09-14 |
| FI760469A7 (enrdf_load_stackoverflow) | 1976-08-25 |
| JPS51109302A (enrdf_load_stackoverflow) | 1976-09-28 |
| SE7502060L (sv) | 1976-08-25 |
| FR2301630B3 (enrdf_load_stackoverflow) | 1978-11-10 |
| NO760586L (enrdf_load_stackoverflow) | 1976-08-25 |
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