GB1079135A - Improvements relating to bleaching of wood pulp - Google Patents
Improvements relating to bleaching of wood pulpInfo
- Publication number
- GB1079135A GB1079135A GB9415/65A GB941565A GB1079135A GB 1079135 A GB1079135 A GB 1079135A GB 9415/65 A GB9415/65 A GB 9415/65A GB 941565 A GB941565 A GB 941565A GB 1079135 A GB1079135 A GB 1079135A
- Authority
- GB
- United Kingdom
- Prior art keywords
- treatment
- wood pulp
- bleached
- bleaching
- weight
- 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
- 229920001131 Pulp (paper) Polymers 0.000 title abstract 2
- 238000004061 bleaching Methods 0.000 title 1
- RYYXDZDBXNUPOG-UHFFFAOYSA-N 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diamine;dihydrochloride Chemical compound Cl.Cl.C1C(N)CCC2=C1SC(N)=N2 RYYXDZDBXNUPOG-UHFFFAOYSA-N 0.000 abstract 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 abstract 1
- -1 Na2 B8 O13.4H2O Chemical class 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 229920000388 Polyphosphate Polymers 0.000 abstract 1
- 239000004115 Sodium Silicate Substances 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 abstract 1
- 150000001642 boronic acid derivatives Chemical class 0.000 abstract 1
- 229960001484 edetic acid Drugs 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000009994 optical bleaching Methods 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- 239000001205 polyphosphate Substances 0.000 abstract 1
- 235000011176 polyphosphates Nutrition 0.000 abstract 1
- 239000003352 sequestering agent Substances 0.000 abstract 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052911 sodium silicate Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000002023 wood Substances 0.000 abstract 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 abstract 1
- 235000009529 zinc sulphate Nutrition 0.000 abstract 1
- 239000011686 zinc sulphate 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
- D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9415/65A GB1079135A (en) | 1965-03-05 | 1965-03-05 | Improvements relating to bleaching of wood pulp |
| SE2759/66A SE306660B (enrdf_load_stackoverflow) | 1965-03-05 | 1966-03-02 | |
| FI0531/66A FI43527B (enrdf_load_stackoverflow) | 1965-03-05 | 1966-03-03 | |
| US531339A US3481828A (en) | 1965-03-05 | 1966-03-03 | Bleaching of wood pulp with thiourea dioxide and zinc sulfate |
| NO161948A NO118091B (enrdf_load_stackoverflow) | 1965-03-05 | 1966-03-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9415/65A GB1079135A (en) | 1965-03-05 | 1965-03-05 | Improvements relating to bleaching of wood pulp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1079135A true GB1079135A (en) | 1967-08-16 |
Family
ID=9871530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9415/65A Expired GB1079135A (en) | 1965-03-05 | 1965-03-05 | Improvements relating to bleaching of wood pulp |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3481828A (enrdf_load_stackoverflow) |
| FI (1) | FI43527B (enrdf_load_stackoverflow) |
| GB (1) | GB1079135A (enrdf_load_stackoverflow) |
| NO (1) | NO118091B (enrdf_load_stackoverflow) |
| SE (1) | SE306660B (enrdf_load_stackoverflow) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4244780A (en) * | 1979-11-15 | 1981-01-13 | Nalco Chemical Company | Use of thiourea dioxide in pulp bleaching processes to preserve pulp strength and aid in brightness |
| US4675076A (en) * | 1986-10-01 | 1987-06-23 | Ppg Industries, Inc. | Method for brightening pulp |
| AT407762B (de) * | 1994-03-22 | 2001-06-25 | Brueggemann L Kg | Bleichmittel zur bleiche von sekundärfaserstoffen für die papierherstellung |
| US6428653B1 (en) | 2000-12-04 | 2002-08-06 | West Fraser Timber Co. Ltd. | Method of bleaching with formamidine sulfinic acid using a reducing agent to eliminate residual peroxide |
| DE102007055415C5 (de) * | 2007-11-19 | 2018-11-29 | SWISS KRONO Tec AG | Verfahren zur Verminderung der Emission von gesättigten und ungesättigten Aldehyden aus Holzwerkstoffen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2956898A (en) * | 1960-10-18 | Certification of correction | ||
| US354477A (en) * | 1886-12-14 | And frank a | ||
| US2259479A (en) * | 1938-08-03 | 1941-10-21 | Sales Affiliates Inc | Process for the manufacture of the solid compound of hydrogen peroxide and urea |
| NL54060C (enrdf_load_stackoverflow) * | 1939-03-22 | 1942-10-15 | ||
| US2361639A (en) * | 1940-07-15 | 1944-10-31 | Henry A Wallace | Process for defibering lignocellulosic materials |
| US2838459A (en) * | 1955-02-01 | 1958-06-10 | Pennsalt Chemicals Corp | Stabilization of solutions containing peroxygen compounds |
| US2872482A (en) * | 1955-03-16 | 1959-02-03 | Saint Gobain | Process of making thiourea dioxide |
| US2859087A (en) * | 1955-03-28 | 1958-11-04 | Du Pont | Process for bleaching webs of fibrous cellulose material with hydrogen peroxide vapor containing water vapor |
| US3384534A (en) * | 1964-12-16 | 1968-05-21 | Fmc Corp | Bleaching of wood pulps with thiourea dioxide |
-
1965
- 1965-03-05 GB GB9415/65A patent/GB1079135A/en not_active Expired
-
1966
- 1966-03-02 SE SE2759/66A patent/SE306660B/xx unknown
- 1966-03-03 US US531339A patent/US3481828A/en not_active Expired - Lifetime
- 1966-03-03 FI FI0531/66A patent/FI43527B/fi active
- 1966-03-04 NO NO161948A patent/NO118091B/no unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI43527B (enrdf_load_stackoverflow) | 1970-12-31 |
| US3481828A (en) | 1969-12-02 |
| NO118091B (enrdf_load_stackoverflow) | 1969-11-03 |
| SE306660B (enrdf_load_stackoverflow) | 1968-12-02 |
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