DE302524C - - Google Patents
Info
- Publication number
- DE302524C DE302524C DE1917L0045167 DEL0045167D DE302524C DE 302524 C DE302524 C DE 302524C DE 1917L0045167 DE1917L0045167 DE 1917L0045167 DE L0045167 D DEL0045167 D DE L0045167D DE 302524 C DE302524 C DE 302524C
- Authority
- DE
- Germany
- Prior art keywords
- wood pulp
- pulp
- overpressure
- cellulose
- chemicals
- 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
- 239000000126 substance Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 229920001131 Pulp (paper) Polymers 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000012084 conversion product Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims 1
- 229920002678 cellulose Polymers 0.000 description 6
- 239000001913 cellulose Substances 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000003518 caustics Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 239000002023 wood 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
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1915L0043285 DE302523C (enrdf_load_stackoverflow) | 1915-06-23 | 1915-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE302524C true DE302524C (enrdf_load_stackoverflow) | 1922-10-26 |
Family
ID=8920238
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1915L0043285 Expired DE302523C (enrdf_load_stackoverflow) | 1915-06-23 | 1915-06-23 | |
| DE1917L0045167 Expired DE302524C (enrdf_load_stackoverflow) | 1915-06-23 | 1917-04-08 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1915L0043285 Expired DE302523C (enrdf_load_stackoverflow) | 1915-06-23 | 1915-06-23 |
Country Status (2)
| Country | Link |
|---|---|
| DE (2) | DE302523C (enrdf_load_stackoverflow) |
| FR (1) | FR525720A (enrdf_load_stackoverflow) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2885317A (en) * | 1954-03-30 | 1959-05-05 | Stora Kopparbergs Bergslags Ab | Method in manufacturing chemical or semi-chemical pulp from heavily resinous wood |
-
1915
- 1915-06-23 DE DE1915L0043285 patent/DE302523C/de not_active Expired
-
1917
- 1917-04-08 DE DE1917L0045167 patent/DE302524C/de not_active Expired
-
1920
- 1920-10-08 FR FR525720A patent/FR525720A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE302523C (enrdf_load_stackoverflow) | 1922-10-26 |
| FR525720A (fr) | 1921-09-27 |
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