NO133041B - - Google Patents
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- Publication number
- NO133041B NO133041B NO3297/73A NO329773A NO133041B NO 133041 B NO133041 B NO 133041B NO 3297/73 A NO3297/73 A NO 3297/73A NO 329773 A NO329773 A NO 329773A NO 133041 B NO133041 B NO 133041B
- Authority
- NO
- Norway
- Prior art keywords
- twig
- cellulose
- pulp
- sulphite
- mass
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 claims description 29
- 239000001913 cellulose Substances 0.000 claims description 29
- 239000002023 wood Substances 0.000 claims description 13
- 238000010411 cooking Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 239000000123 paper Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- 229920001732 Lignosulfonate Polymers 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- ZETCGWYACBNPIH-UHFFFAOYSA-N azane;sulfurous acid Chemical compound N.OS(O)=O ZETCGWYACBNPIH-UHFFFAOYSA-N 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater 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
- D21C3/22—Other features of pulping processes
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
Landscapes
- Paper (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO3297/73A NO133041B (fi) | 1973-08-21 | 1973-08-21 | |
| CA206,979A CA1026910A (en) | 1973-08-21 | 1974-08-14 | Process for preparing cellulose from knotter pulp |
| DE19742439654 DE2439654C3 (de) | 1973-08-21 | 1974-08-19 | Verfahren zur Herstellung von Cellulose aus Siebpulpe |
| SE7410535A SE7410535L (fi) | 1973-08-21 | 1974-08-19 | |
| FI2457/74A FI53845C (fi) | 1973-08-21 | 1974-08-20 | Foerfarande foer framstaellning av cellulosa av kvistmassa |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO3297/73A NO133041B (fi) | 1973-08-21 | 1973-08-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO329773L NO329773L (fi) | 1975-03-17 |
| NO133041B true NO133041B (fi) | 1975-11-17 |
Family
ID=19879512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO3297/73A NO133041B (fi) | 1973-08-21 | 1973-08-21 |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA1026910A (fi) |
| FI (1) | FI53845C (fi) |
| NO (1) | NO133041B (fi) |
| SE (1) | SE7410535L (fi) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4220498A (en) * | 1978-12-14 | 1980-09-02 | Kamyr, Inc. | Oxygen reactor systems pulp reject treatment |
-
1973
- 1973-08-21 NO NO3297/73A patent/NO133041B/no unknown
-
1974
- 1974-08-14 CA CA206,979A patent/CA1026910A/en not_active Expired
- 1974-08-19 SE SE7410535A patent/SE7410535L/xx unknown
- 1974-08-20 FI FI2457/74A patent/FI53845C/fi active
Also Published As
| Publication number | Publication date |
|---|---|
| FI245774A (fi) | 1975-02-22 |
| CA1026910A (en) | 1978-02-28 |
| DE2439654B2 (de) | 1977-03-10 |
| NO329773L (fi) | 1975-03-17 |
| DE2439654A1 (de) | 1975-03-20 |
| FI53845C (fi) | 1978-08-10 |
| FI53845B (fi) | 1978-05-02 |
| SE7410535L (fi) | 1975-02-24 |
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