GB593206A - Process for purifying cotton linters - Google Patents
Process for purifying cotton lintersInfo
- Publication number
- GB593206A GB593206A GB15122/45A GB1512245A GB593206A GB 593206 A GB593206 A GB 593206A GB 15122/45 A GB15122/45 A GB 15122/45A GB 1512245 A GB1512245 A GB 1512245A GB 593206 A GB593206 A GB 593206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- treatment
- steam pressure
- cotton linters
- washed
- 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
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- 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
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/18—Working under pressure in closed vessels
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detergent Compositions (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
Raw cotton linters are purified by treatment with strong aqueous alkali of a concentration equivalent to 5-15 per cent caustic soda at a temperature substantially above the boiling point of the solution and under steam pressure above atmospheric pressure. This treatment may be followed by treatment with available chlorine. Caustic soda solution may be used at a temperature of about 260 DEG F. for 3-4 hours to 390 DEG F. for 10-30 mins. under the corresponding steam pressure. The digestion may be performed in the presence of 0.4 per cent to about 1.2 per cent turkey red oil or other detergent. Use of a hypochlorite is preferred as bleaching agent. In an example, raw cotton linters are digested in 7.5 per cent aqueous sodium hydroxide at 275 DEG F. under steam pressure of 30 lbs. per square inch for three hours, washed and subjected to a series of aqueous hypochlorite treatments, washed and dried. Cellulose derivatives prepared from cellulose purified as above have improved clarity and filterability.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US593206XA | 1944-03-11 | 1944-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB593206A true GB593206A (en) | 1947-10-10 |
Family
ID=22022229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15122/45A Expired GB593206A (en) | 1944-03-11 | 1945-06-14 | Process for purifying cotton linters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB593206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954553A (en) * | 1972-05-15 | 1976-05-04 | Owens-Illinois, Inc. | Non-sulfur pulping process for corrugating medium using sodium carbonate and sodium hydroxide |
| EP0436849A1 (en) * | 1990-01-08 | 1991-07-17 | MTM Obermaier GmbH | Process for the extraction of impurities from natural cellulose |
-
1945
- 1945-06-14 GB GB15122/45A patent/GB593206A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3954553A (en) * | 1972-05-15 | 1976-05-04 | Owens-Illinois, Inc. | Non-sulfur pulping process for corrugating medium using sodium carbonate and sodium hydroxide |
| EP0436849A1 (en) * | 1990-01-08 | 1991-07-17 | MTM Obermaier GmbH | Process for the extraction of impurities from natural cellulose |
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