GB601645A - Improvements in or relating to bleaching of cellulose fibres - Google Patents
Improvements in or relating to bleaching of cellulose fibresInfo
- Publication number
- GB601645A GB601645A GB32483/45A GB3248345A GB601645A GB 601645 A GB601645 A GB 601645A GB 32483/45 A GB32483/45 A GB 32483/45A GB 3248345 A GB3248345 A GB 3248345A GB 601645 A GB601645 A GB 601645A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fibres
- active chlorine
- aqueous
- chlorine
- bleached
- 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
- D06L4/70—Multi-step processes
-
- 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
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Paper (AREA)
Abstract
Cellulose fibres are bleached by treating the fibres with active chlorine in aqueous solution followed by optional rising and centrifuging, and then subjecting them to the action of a calcium and magnesium sequestering agent, whereupon the fibres are again treated with chlorine, e.g. in a bath containing less active chlorine than the first. A "calcium and magnesium sequestering agent" is defined as an agent which gives rise to formation of complex negative ions including those metals so as to prevent precipitation of their salts from baths containing compounds which otherwise would insolubilise the alkaline earth metals present, e.g. alkali hexametaphosphates or sulphamates. The fibres may be bleached by treating them with active chlorine at a pH under 3, then with aqueous alkali hexametaphosphate or sulphamate to which sodium carbonate is added to bring the pH between 10.5 and 11.5, followed by aqueous active chlorine at a pH under 3, and are finally declorinated with aqueous sodium bisulphite at a pH of 8.5. The preferred temperature range at which all steps may be carried out is 15 DEG to 25 DEG C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE601645X | 1944-12-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB601645A true GB601645A (en) | 1948-05-10 |
Family
ID=3874136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32483/45A Expired GB601645A (en) | 1944-12-15 | 1945-11-30 | Improvements in or relating to bleaching of cellulose fibres |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE457938A (en) |
| FR (1) | FR918044A (en) |
| GB (1) | GB601645A (en) |
| NL (1) | NL60809C (en) |
-
0
- NL NL60809D patent/NL60809C/xx active
- BE BE457938D patent/BE457938A/xx unknown
-
1945
- 1945-11-27 FR FR918044D patent/FR918044A/en not_active Expired
- 1945-11-30 GB GB32483/45A patent/GB601645A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL60809C (en) | |
| FR918044A (en) | 1947-01-28 |
| BE457938A (en) |
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