NO763179L - - Google Patents
Info
- Publication number
- NO763179L NO763179L NO763179A NO763179A NO763179L NO 763179 L NO763179 L NO 763179L NO 763179 A NO763179 A NO 763179A NO 763179 A NO763179 A NO 763179A NO 763179 L NO763179 L NO 763179L
- Authority
- NO
- Norway
- Prior art keywords
- pulp
- chemical
- mechanical
- chips
- treated
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 28
- 238000004519 manufacturing process Methods 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 22
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 17
- 239000002023 wood Substances 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 9
- 230000000930 thermomechanical effect Effects 0.000 claims description 9
- 238000009835 boiling Methods 0.000 claims description 5
- 239000007791 liquid phase Substances 0.000 claims description 3
- 238000010411 cooking Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 239000012808 vapor phase Substances 0.000 claims description 2
- 241000218631 Coniferophyta Species 0.000 claims 1
- 229920001131 Pulp (paper) Polymers 0.000 description 26
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 13
- 238000004537 pulping Methods 0.000 description 11
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 6
- 235000011121 sodium hydroxide Nutrition 0.000 description 6
- 230000000875 corresponding effect Effects 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 241000218657 Picea Species 0.000 description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 3
- 239000010876 untreated wood Substances 0.000 description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229920005610 lignin Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010875 treated wood Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000009002 Picea mariana Species 0.000 description 1
- 235000017997 Picea mariana var. mariana Nutrition 0.000 description 1
- 235000018000 Picea mariana var. semiprostrata Nutrition 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 239000010959 steel Substances 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
-
- 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
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
Landscapes
- Engineering & Computer Science (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 |
|---|---|---|---|
| GB3837775 | 1975-09-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO763179L true NO763179L (xx) | 1977-03-21 |
Family
ID=10403089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO763179A NO763179L (xx) | 1975-09-18 | 1976-09-16 |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5240603A (xx) |
| CA (1) | CA1094263A (xx) |
| FI (1) | FI762641A (xx) |
| FR (1) | FR2324793A1 (xx) |
| NO (1) | NO763179L (xx) |
| SE (1) | SE7610345L (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8300124D0 (sv) * | 1983-01-12 | 1983-01-12 | Billerud Uddeholm Ab | Behandling av vedflis |
| DE102007022751A1 (de) * | 2007-05-11 | 2008-11-13 | Voith Patent Gmbh | Ablauge eines Sulfitaufschlusses |
-
1976
- 1976-09-10 CA CA260,981A patent/CA1094263A/en not_active Expired
- 1976-09-15 FI FI762641A patent/FI762641A/fi not_active Application Discontinuation
- 1976-09-16 NO NO763179A patent/NO763179L/no unknown
- 1976-09-16 FR FR7627828A patent/FR2324793A1/fr active Granted
- 1976-09-17 JP JP51111654A patent/JPS5240603A/ja active Pending
- 1976-09-17 SE SE7610345A patent/SE7610345L/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI762641A (xx) | 1977-03-19 |
| CA1094263A (en) | 1981-01-27 |
| JPS5240603A (en) | 1977-03-29 |
| FR2324793B3 (xx) | 1979-06-01 |
| SE7610345L (sv) | 1977-03-19 |
| FR2324793A1 (fr) | 1977-04-15 |
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