GB822974A - Process for bleaching cellulosic material with hypochlorite - Google Patents
Process for bleaching cellulosic material with hypochloriteInfo
- Publication number
- GB822974A GB822974A GB12760/57A GB1276057A GB822974A GB 822974 A GB822974 A GB 822974A GB 12760/57 A GB12760/57 A GB 12760/57A GB 1276057 A GB1276057 A GB 1276057A GB 822974 A GB822974 A GB 822974A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hypochlorite
- concentration
- cellulosic material
- bath
- electric potential
- 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
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
- D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
- D06L4/23—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Paper (AREA)
Abstract
In a process of bleaching cellulosic material with an alkaline hypochlorite solution, the concentration of active chlorine, as hypochlorite, in the bleaching bath is kept, by measurement of the electric potential of the bath, below that concentration above which the electric potential does not increase at an appreciable rate with increasing active chlorine concentration. The cellulosic material may be fibres, yarns or fabrics of cotton, linen or regenerated cellulose and may be previously treated with a hot sodium hydroxide solution. In examples the alkaline hypochlorite bath is at a temperature from 60 DEG to 80 DEG C. and initial active chlorine concentration of 0.023 to 0.05 grams per litre and successive additions of hypochlorite are made to maintain the concentration. The additions may be made automatically in response to changes in the electric potential.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL822974X | 1956-04-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB822974A true GB822974A (en) | 1959-11-04 |
Family
ID=19840929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12760/57A Expired GB822974A (en) | 1956-04-24 | 1957-04-18 | Process for bleaching cellulosic material with hypochlorite |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE556872A (en) |
| FR (1) | FR1233512A (en) |
| GB (1) | GB822974A (en) |
-
0
- BE BE556872D patent/BE556872A/xx unknown
-
1957
- 1957-04-18 GB GB12760/57A patent/GB822974A/en not_active Expired
- 1957-04-24 FR FR737047A patent/FR1233512A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE556872A (en) | |
| FR1233512A (en) | 1960-10-12 |
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