GB616033A - Improvements in the purification of cellulose products - Google Patents
Improvements in the purification of cellulose productsInfo
- Publication number
- GB616033A GB616033A GB2494646A GB2494646A GB616033A GB 616033 A GB616033 A GB 616033A GB 2494646 A GB2494646 A GB 2494646A GB 2494646 A GB2494646 A GB 2494646A GB 616033 A GB616033 A GB 616033A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water
- treatment
- washed
- cellulose
- yarn
- 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
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/01—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof
- D06M11/05—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof with water, e.g. steam; with heavy water
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Paper (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Artificial Filaments (AREA)
Abstract
Cellulose, regenerated cellulose, or cellulose ester or ether material containing metallic cations derived from mineral-containing fresh water, is subjected to treatment with mineral-containing fresh water at a pH of about 2-5 to remove metallic cations and is then washed with water substantially free from metallic cations. The treatment may be applied to filaments, fibres, ribbons, films, or other materials which have been subjected to wet treatments and washed with water containing dissolved salts of calcium, magnesium, or sodium. Such compounds cause irregularities in the material if they are not removed before the material is dried. Sulphuric or hydrochloric acid may be used for acidifying the water. Subsequent washing may be effected with distilled water or water which has been freed from metallic cations by contact with a substance that exchanges hydrogen for those cations. A small proportion of ammonia may be added to the water in the last stages of washing to hasten the attainment of neutrality. In an example, bobbins of freshly-spun viscose yarn are subjected to treatment with hot and cold water, then to treatment with a desulphurizing liquid, e.g. ammonium sulphide solution at 40 DEG C., and then to another washing treatment with hot water. Hard water is used for all these washing treatments. The bobbins are then washed with hard water acidified to pH2, and then with de-mineralized water. The dye affinity of the yarn is improved. In another example, high tenacity cellulose acetate yarn is completely saponified with a solution of caustic soda and sodium acetate. The yarn is washed thoroughly in hard water, then in hard water acidified with hydrochloric acid to pH2, and finally washed with distilled water. The treatment may be applied to cotton, linen, or other cellulosic material. It may be applied to cellulose pulp, and to cellulose esters and ethers in flake or powder form.ALSO:Cellulose, regenerated cellulose, or cellulose ester or ether material containing metallic cations derived from mineral-containing fresh water, is subjected to treatment with mineral-containing fresh water at a pH of about 2-5 to remove metallic cations and is then washed with water substantially free from metallic cations. The treatment may be applied to filaments, fibres, ribbons, films, or other materials which have been subjected to wet treatments and washed with water containing dissolved salts of calcium, magnesium, or sodium. Such compounds cause irregularities in the material if they are not removed before the material is dried. Sulphuric or hydrochloric acid may be used for acidifying the water. Subsequent washing may be effected with distilled water or water which has been freed from metallic cations by contact with a substance that exchanges hydrogen for those cations. A small proportion of ammonia may be added to the water in the last stages of washing to hasten the attainment of neutrality. In an example, bobbins of freshly spun viscose yarn are subjected to treatment with hot and cold water, then to treatment with a desulphurizing liquid, e.g. ammonium sulphide solution at 40 DEG C., and then to another washing treatment with hot water. Hard water is used for all these washing treatments. The bobbins are then washed with hard water acidified to pH2, and then with de-mineralized water. The dye affinity of the yarn is improved. In another example, high tenacity cellulose acetate yarn is completely saponified with a solution of caustic soda and sodium acetate. The yarn is washed thoroughly in hard water, then in hard water acidified with hydrochloric acid to pH2, and finally washed with distilled water. The treatment may be applied to cotton, linen, or other cellulosic material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2494646A GB616033A (en) | 1946-08-21 | 1946-08-21 | Improvements in the purification of cellulose products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2494646A GB616033A (en) | 1946-08-21 | 1946-08-21 | Improvements in the purification of cellulose products |
Publications (1)
Publication Number | Publication Date |
---|---|
GB616033A true GB616033A (en) | 1949-01-14 |
Family
ID=10219782
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2494646A Expired GB616033A (en) | 1946-08-21 | 1946-08-21 | Improvements in the purification of cellulose products |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB616033A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922728A (en) * | 1956-11-05 | 1960-01-26 | American Enka Corp | Prevention of yellowing in freshly spun viscose rayon with tartaric, citric or gluconic acid |
-
1946
- 1946-08-21 GB GB2494646A patent/GB616033A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2922728A (en) * | 1956-11-05 | 1960-01-26 | American Enka Corp | Prevention of yellowing in freshly spun viscose rayon with tartaric, citric or gluconic acid |
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