GB616464A - Improvements in the production of regenerated cellulose products by the viscose process - Google Patents
Improvements in the production of regenerated cellulose products by the viscose processInfo
- Publication number
- GB616464A GB616464A GB26590/46A GB2659046A GB616464A GB 616464 A GB616464 A GB 616464A GB 26590/46 A GB26590/46 A GB 26590/46A GB 2659046 A GB2659046 A GB 2659046A GB 616464 A GB616464 A GB 616464A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coagulating bath
- added
- wash water
- acid
- polyphosphate
- 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
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/02—Chemical after-treatment of artificial filaments or the like during manufacture of cellulose, cellulose derivatives, or proteins
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Artificial Filaments (AREA)
Abstract
In the production of regenerated cellulose products by the viscose process, the coagulated and at least partly regenerated but not desulphurized products are treated with a solution of a metaphosphate, tetraphosphate or polyphosphate or a corresponding free phosphoric acid, whereby impurities causing discolouration are removed. Preferably, the product is treated while still wet from the coagulating bath. The acidity of the solution should correspond to pH3 or lower (this is including acidity due to acid from the coagulating bath). In the preferred method of carrying out the invention, the phosphate, especially an alkali metal hexametaphosphate, in amount 0.025 to 0.1 per cent based on the water is added to one or more portions of the wash water used for the removal of the acid coagulating bath. The phosphate is of advantage added to the first wash water, but if desired it may be included in subsequent washes. The temperature of the wash liquid is preferably between 50 DEG and 60 DEG C., though temperatures down to 30 DEG C. may be used. Any commercially available alkali metal metaphosphate may be employed, such as Graham's salt, "Buromin," "Calgon" (both Registered Trade Marks), Sofos, Quadrafos and sodium tri-polyphosphate. In an example, a freshly-spun unwashed cake of viscose yarn on a foraminated aluminium bobbin is placed in a washing unit equipped with evacuation apparatus. After effecting the vacuum seal, the tub is filled with wash water at 60 DEG C. to which 0.1 per cent sodium hexametaphosphate has been added, and washing continued for 50 minutes. The tub is then drained and the yarn package washed with hot water and desulphurised &c.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US614579A US2585141A (en) | 1945-09-05 | 1945-09-05 | Treatment of viscose products |
Publications (1)
Publication Number | Publication Date |
---|---|
GB616464A true GB616464A (en) | 1949-01-21 |
Family
ID=24461867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26590/46A Expired GB616464A (en) | 1945-09-05 | 1946-09-04 | Improvements in the production of regenerated cellulose products by the viscose process |
Country Status (2)
Country | Link |
---|---|
US (1) | US2585141A (en) |
GB (1) | GB616464A (en) |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE400821A (en) * | 1933-01-12 | |||
GB245815A (en) * | 1924-09-17 | 1926-01-18 | William Porter Dreaper | Improvements in the manufacture of artificial silk and the like from viscose solutions |
US1576531A (en) * | 1925-04-29 | 1926-03-16 | Mendel William | Manufacture of filaments and films from viscose |
US1633220A (en) * | 1925-05-23 | 1927-06-21 | Samuel A Heidich | Process of dyeing filaments and films formed from viscore |
US1580843A (en) * | 1925-05-28 | 1926-04-13 | Samuel A Neidich | Manufacture of artificial silk from viscose |
US1655097A (en) * | 1926-03-27 | 1928-01-03 | Pont Rayon Company Inc Du | Treatment of rayon |
BE406095A (en) * | 1933-11-09 | |||
US1977533A (en) * | 1933-12-29 | 1934-10-16 | American Enka Corp | Method of desulphurizing rayon |
CH191212A (en) * | 1934-01-31 | 1937-06-15 | Chemische Werke Vorm H & E Alb | Process for rendering the hardness components harmless in washing processes. |
GB443498A (en) * | 1934-09-05 | 1936-03-02 | Henkel & Cie Gmbh | Improvements in or relating to bleaching, washing and cleansing agents, particularlyfor use in water containing iron |
US2031827A (en) * | 1934-12-07 | 1936-02-25 | Rumford Chemical Works | Process of making tetraphosphates |
US2140008A (en) * | 1936-06-18 | 1938-12-13 | Hall Lab Inc | Tanning |
US2374100A (en) * | 1937-05-03 | 1945-04-17 | Hall Lab Inc | Water treatment |
-
1945
- 1945-09-05 US US614579A patent/US2585141A/en not_active Expired - Lifetime
-
1946
- 1946-09-04 GB GB26590/46A patent/GB616464A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2585141A (en) | 1952-02-12 |
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