SE8602057L - Forfarande for blekning av ns-aq- eller sap-massa - Google Patents
Forfarande for blekning av ns-aq- eller sap-massaInfo
- Publication number
- SE8602057L SE8602057L SE8602057A SE8602057A SE8602057L SE 8602057 L SE8602057 L SE 8602057L SE 8602057 A SE8602057 A SE 8602057A SE 8602057 A SE8602057 A SE 8602057A SE 8602057 L SE8602057 L SE 8602057L
- Authority
- SE
- Sweden
- Prior art keywords
- pulp
- weight
- whitening
- procedure
- sap
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 230000002087 whitening effect Effects 0.000 title 1
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 abstract 2
- 238000004061 bleaching Methods 0.000 abstract 2
- 229960003330 pentetic acid Drugs 0.000 abstract 2
- 150000002978 peroxides Chemical class 0.000 abstract 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract 2
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- YAZJBJXUPFNJSH-UHFFFAOYSA-N anthracene-9,10-dione;sulfurous acid Chemical compound OS(O)=O.C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 YAZJBJXUPFNJSH-UHFFFAOYSA-N 0.000 abstract 1
- 239000008139 complexing agent Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 235000019353 potassium silicate Nutrition 0.000 abstract 1
- 238000004537 pulping Methods 0.000 abstract 1
- 159000000000 sodium salts Chemical class 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 abstract 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
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides
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 |
|---|---|---|---|
| FI851779A FI76136C (fi) | 1985-05-06 | 1985-05-06 | Foerfarande foer blekning av ns-aq- eller sap-massa. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8602057D0 SE8602057D0 (sv) | 1986-05-05 |
| SE8602057L true SE8602057L (sv) | 1986-11-07 |
Family
ID=8520776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8602057A SE8602057L (sv) | 1985-05-06 | 1986-05-05 | Forfarande for blekning av ns-aq- eller sap-massa |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1274655A (xx) |
| FI (1) | FI76136C (xx) |
| SE (1) | SE8602057L (xx) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7001484B2 (en) | 2000-05-04 | 2006-02-21 | University Of New Brunswick | Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent |
| US8298373B2 (en) | 2008-02-07 | 2012-10-30 | University Of New Brunswick | Combined process of peroxide bleaching of wood pulps and addition of optical brightening agents |
-
1985
- 1985-05-06 FI FI851779A patent/FI76136C/fi not_active IP Right Cessation
-
1986
- 1986-04-30 CA CA000507958A patent/CA1274655A/en not_active Expired - Lifetime
- 1986-05-05 SE SE8602057A patent/SE8602057L/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI851779A0 (fi) | 1985-05-06 |
| CA1274655A (en) | 1990-10-02 |
| FI76136B (fi) | 1988-05-31 |
| FI851779L (fi) | 1986-11-07 |
| SE8602057D0 (sv) | 1986-05-05 |
| FI76136C (fi) | 1988-09-09 |
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