RO99569B1 - Process for obtaining unbleached cellulose sulphate from resinous trees - Google Patents
Process for obtaining unbleached cellulose sulphate from resinous treesInfo
- Publication number
- RO99569B1 RO99569B1 RO129942A RO12994287A RO99569B1 RO 99569 B1 RO99569 B1 RO 99569B1 RO 129942 A RO129942 A RO 129942A RO 12994287 A RO12994287 A RO 12994287A RO 99569 B1 RO99569 B1 RO 99569B1
- Authority
- RO
- Romania
- Prior art keywords
- cellulose sulphate
- unbleached cellulose
- resinous trees
- obtaining
- washing
- Prior art date
Links
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 229910021653 sulphate ion Inorganic materials 0.000 title abstract 2
- 229920002678 cellulose Polymers 0.000 title 1
- 239000001913 cellulose Substances 0.000 title 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 2
- 239000011122 softwood Substances 0.000 abstract 2
- 238000005406 washing Methods 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229910052979 sodium sulfide Inorganic materials 0.000 abstract 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Landscapes
- Paper (AREA)
Abstract
Inventia se refera la un procedeu de obtinere a celulozei sulfat neînalbita din rasinoase, care, în scopul simplificarii conditiilor de lucru si îmbunatatirii proprietatilor privind puritatea, rezistenta si durabilitatea - dezincrustarea, se realizeaza cu 18,5 ... 19% alcalii active si sulfiditate de 30%, obtinuta din sulf-sulfura de sodiu la presiunea de 6 at, timp de 180 plus sau minus 10 min la tempratura de 165 grade C, spalarea se realizeaza în cinci trepte, iar tratarea chimica se realizeaza cu acid clorhidric 35%, în cantitate de 2 ... 6% fata de fibra, timp de 45 ... 50 min, si apoi prin spalarea continua în trei trepte pâna la pH = 6,0 ... 7,0.The invention relates to a process for the production of softwood sulphate pulp from softwoods, which, in order to simplify the working conditions and improve the properties of purity, strength and durability - the deinclusion, is achieved with 18.5 ... 19% active alcals and sulphidity of 30% obtained from sodium sulfide at a pressure of 6 atm for 180 plus or minus 10 min at 165 ° C temperature, the washing is carried out in five steps and the chemical treatment is performed with 35% hydrochloric acid, in an amount of 2 ... 6% of the fiber for 45 ... 50 minutes, and then by continuous washing in three steps until pH = 6.0 ... 7.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129942A RO99569B1 (en) | 1987-10-03 | 1987-10-03 | Process for obtaining unbleached cellulose sulphate from resinous trees |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO129942A RO99569B1 (en) | 1987-10-03 | 1987-10-03 | Process for obtaining unbleached cellulose sulphate from resinous trees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| RO99569B1 true RO99569B1 (en) | 1990-08-30 |
Family
ID=40907630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO129942A RO99569B1 (en) | 1987-10-03 | 1987-10-03 | Process for obtaining unbleached cellulose sulphate from resinous trees |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO99569B1 (en) |
-
1987
- 1987-10-03 RO RO129942A patent/RO99569B1/en unknown
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