NO762919L - - Google Patents
Info
- Publication number
- NO762919L NO762919L NO762919A NO762919A NO762919L NO 762919 L NO762919 L NO 762919L NO 762919 A NO762919 A NO 762919A NO 762919 A NO762919 A NO 762919A NO 762919 L NO762919 L NO 762919L
- Authority
- NO
- Norway
- Prior art keywords
- treatment
- alkaline
- carried out
- pulp
- boiling
- Prior art date
Links
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 79
- 238000011282 treatment Methods 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 29
- 229920002488 Hemicellulose Polymers 0.000 claims description 23
- 238000004061 bleaching Methods 0.000 claims description 18
- 238000009835 boiling Methods 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 13
- 229920002678 cellulose Polymers 0.000 claims description 13
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 11
- 239000001913 cellulose Substances 0.000 claims description 10
- 238000010411 cooking Methods 0.000 claims description 6
- 239000012670 alkaline solution Substances 0.000 claims description 5
- 230000007062 hydrolysis Effects 0.000 claims description 5
- 238000006460 hydrolysis reaction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 229920000875 Dissolving pulp Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 description 13
- 229920000297 Rayon Polymers 0.000 description 12
- 235000010980 cellulose Nutrition 0.000 description 10
- 238000005517 mercerization Methods 0.000 description 9
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 238000010924 continuous production Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000000725 suspension 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
- 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)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI752400A FI52230C (fi) | 1975-08-26 | 1975-08-26 | Menetelmä liukosellun valmistamiseksi. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO762919L true NO762919L (ja) | 1977-03-01 |
Family
ID=8509397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO762919A NO762919L (ja) | 1975-08-26 | 1976-08-25 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5227802A (ja) |
| CS (1) | CS199637B2 (ja) |
| DD (1) | DD127342A5 (ja) |
| FI (1) | FI52230C (ja) |
| NO (1) | NO762919L (ja) |
| PL (1) | PL110637B1 (ja) |
| RO (1) | RO69645A (ja) |
| SE (1) | SE7607879L (ja) |
| YU (1) | YU177976A (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2101005A1 (en) * | 1992-07-27 | 1994-01-28 | Johan Gullichsen | Green liquor crystallization |
-
1975
- 1975-08-26 FI FI752400A patent/FI52230C/fi not_active IP Right Cessation
-
1976
- 1976-07-09 SE SE7607879A patent/SE7607879L/xx unknown
- 1976-07-19 YU YU01779/76A patent/YU177976A/xx unknown
- 1976-08-19 RO RO7687334A patent/RO69645A/ro unknown
- 1976-08-23 DD DD194439A patent/DD127342A5/xx unknown
- 1976-08-25 CS CS765512A patent/CS199637B2/cs unknown
- 1976-08-25 PL PL1976192002A patent/PL110637B1/pl unknown
- 1976-08-25 NO NO762919A patent/NO762919L/no unknown
- 1976-08-26 JP JP51102176A patent/JPS5227802A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| RO69645A (ro) | 1980-08-15 |
| FI52230B (ja) | 1977-03-31 |
| PL110637B1 (en) | 1980-07-31 |
| SE7607879L (sv) | 1977-02-27 |
| DD127342A5 (ja) | 1977-09-21 |
| JPS5227802A (en) | 1977-03-02 |
| CS199637B2 (cs) | 1980-07-31 |
| YU177976A (en) | 1982-05-31 |
| FI52230C (fi) | 1977-07-11 |
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