CA1081908A - Method of improving the homogenity at periodical digestion of ligno-cellulose containing material - Google Patents
Method of improving the homogenity at periodical digestion of ligno-cellulose containing materialInfo
- Publication number
- CA1081908A CA1081908A CA249,635A CA249635A CA1081908A CA 1081908 A CA1081908 A CA 1081908A CA 249635 A CA249635 A CA 249635A CA 1081908 A CA1081908 A CA 1081908A
- Authority
- CA
- Canada
- Prior art keywords
- digester
- boiling
- circulation
- digestion
- minutes
- 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 33
- 230000029087 digestion Effects 0.000 title claims abstract description 17
- 229920002678 cellulose Polymers 0.000 title claims abstract description 5
- 239000001913 cellulose Substances 0.000 title claims abstract description 5
- 239000000463 material Substances 0.000 title claims abstract description 5
- 230000004087 circulation Effects 0.000 claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000010411 cooking Methods 0.000 claims abstract description 11
- 238000012856 packing Methods 0.000 claims description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 239000000460 chlorine Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000002023 wood Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004537 pulping Methods 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
Landscapes
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7504526A SE403308B (sv) | 1975-04-18 | 1975-04-18 | Sett att forbettra homogeniteten vid periodisk kokning av lignocellulosahaltigt material |
| SE7504526-0 | 1975-04-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1081908A true CA1081908A (en) | 1980-07-22 |
Family
ID=20324340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA249,635A Expired CA1081908A (en) | 1975-04-18 | 1976-04-06 | Method of improving the homogenity at periodical digestion of ligno-cellulose containing material |
Country Status (5)
| Country | Link |
|---|---|
| CA (1) | CA1081908A (en, 2012) |
| FI (1) | FI62688C (en, 2012) |
| FR (1) | FR2307911A1 (en, 2012) |
| NO (1) | NO146960C (en, 2012) |
| SE (1) | SE403308B (en, 2012) |
-
1975
- 1975-04-18 SE SE7504526A patent/SE403308B/xx unknown
-
1976
- 1976-03-30 FI FI760847A patent/FI62688C/fi not_active IP Right Cessation
- 1976-04-06 CA CA249,635A patent/CA1081908A/en not_active Expired
- 1976-04-08 FR FR7610228A patent/FR2307911A1/fr active Granted
- 1976-04-09 NO NO761240A patent/NO146960C/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NO146960C (no) | 1983-01-05 |
| FR2307911B1 (en, 2012) | 1979-06-29 |
| FI62688C (fi) | 1983-02-10 |
| FI62688B (fi) | 1982-10-29 |
| SE7504526L (sv) | 1976-10-19 |
| NO146960B (no) | 1982-09-27 |
| NO761240L (en, 2012) | 1976-10-19 |
| FI760847A7 (en, 2012) | 1976-10-19 |
| FR2307911A1 (fr) | 1976-11-12 |
| SE403308B (sv) | 1978-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |