GB519522A - Improvements in the bleaching of cellulosic material - Google Patents
Improvements in the bleaching of cellulosic materialInfo
- Publication number
- GB519522A GB519522A GB24277/38A GB2427738A GB519522A GB 519522 A GB519522 A GB 519522A GB 24277/38 A GB24277/38 A GB 24277/38A GB 2427738 A GB2427738 A GB 2427738A GB 519522 A GB519522 A GB 519522A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chlorine
- bleached
- treatment
- solution
- sodium chlorite
- 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
- 239000000463 material Substances 0.000 title abstract 4
- 238000004061 bleaching Methods 0.000 title abstract 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 9
- 239000000460 chlorine Substances 0.000 abstract 9
- 229910052801 chlorine Inorganic materials 0.000 abstract 9
- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 abstract 4
- 229960002218 sodium chlorite Drugs 0.000 abstract 4
- 239000000243 solution Substances 0.000 abstract 3
- 229920000742 Cotton Polymers 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 abstract 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 abstract 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract 1
- 229920000297 Rayon Polymers 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 239000007900 aqueous suspension Substances 0.000 abstract 1
- 239000000872 buffer Substances 0.000 abstract 1
- 229920002678 cellulose Polymers 0.000 abstract 1
- 239000001913 cellulose Substances 0.000 abstract 1
- 229910001919 chlorite Inorganic materials 0.000 abstract 1
- 229910052619 chlorite group Inorganic materials 0.000 abstract 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 abstract 1
- 239000004744 fabric Substances 0.000 abstract 1
- 239000002655 kraft paper Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- BHZOKUMUHVTPBX-UHFFFAOYSA-M sodium acetic acid acetate Chemical compound [Na+].CC(O)=O.CC([O-])=O BHZOKUMUHVTPBX-UHFFFAOYSA-M 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
519,522. Bleaching cellulosic materials. MATHIESON ALKALI WORKS. Aug. 17, 1938, No. 24277. Convention date, Sept. 1, 1937. [Class 15 (ii)] Cellulosic material is bleached by introducing chlorine, as gas or in aqueous solution, into an aqueous solution of a chlorite of an alkali metal or an alkaline earth metal in contact with the materials. The process may follow a partial bleaching with chlorine or a hypochlorite. In examples: (1) and (2) kraft pulp is partially bleached with chlorine, re-suspended in a solution of sodium chlorite and chlorine introduced over a period, in one case with the addition of a sodium acetate-acetic acid buffer ; (3) sulphite pulp is bleached in a bath of sodium chlorite into which chlorine is introduced and then subjected to a similar treatment in a bath, of different strength ; (4) sulphite cellulose is bleached by treatment in aqueous suspension with chlorine followed by treatment with chlorine while suspended in sodium chlorite solution; (5) to (10) cotton linters, cotton cloth and viscose rayon are bleached by treatment in a solution of sodium chlorite into which chlorine is introduced as chlorine gas or chlorine water. Specification 380,488, is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US161969A US2235837A (en) | 1937-09-01 | 1937-09-01 | Bleaching cellulose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB519522A true GB519522A (en) | 1940-03-29 |
Family
ID=22583603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24277/38A Expired GB519522A (en) | 1937-09-01 | 1938-08-17 | Improvements in the bleaching of cellulosic material |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2235837A (en) |
| FR (1) | FR842235A (en) |
| GB (1) | GB519522A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1080391B (en) * | 1954-07-24 | 1960-04-21 | Amelioration Et Le Developpmen | Process for breaking up straw and bleaching wood pulp using chlorates |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478043A (en) * | 1940-01-23 | 1949-08-02 | Evans Cyril Harry | Treatment of wheat, rye, and other cereals, and bran |
| US2587064A (en) * | 1949-03-09 | 1952-02-26 | Int Paper Canada | Method of bleaching wood pulp |
| BE518419A (en) * | 1952-03-26 | |||
| US2741537A (en) * | 1952-03-26 | 1956-04-10 | Olin Mathieson | Available chlorine single-stage bleaching of sulfate pulp |
| GB762688A (en) * | 1954-02-16 | 1956-12-05 | Unilever Ltd | Improvements in or relating to the manufacture of soap |
-
1937
- 1937-09-01 US US161969A patent/US2235837A/en not_active Expired - Lifetime
-
1938
- 1938-08-17 GB GB24277/38A patent/GB519522A/en not_active Expired
- 1938-08-17 FR FR842235D patent/FR842235A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1080391B (en) * | 1954-07-24 | 1960-04-21 | Amelioration Et Le Developpmen | Process for breaking up straw and bleaching wood pulp using chlorates |
Also Published As
| Publication number | Publication date |
|---|---|
| FR842235A (en) | 1939-06-08 |
| US2235837A (en) | 1941-03-25 |
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