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 process

Info

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
Application number
GB26590/46A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acordis UK Ltd
Original Assignee
British Celanese Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by British Celanese Ltd filed Critical British Celanese Ltd
Publication of GB616464A publication Critical patent/GB616464A/en
Expired legal-status Critical Current

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.
GB26590/46A 1945-09-05 1946-09-04 Improvements in the production of regenerated cellulose products by the viscose process Expired GB616464A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
US2585141A (en) 1952-02-12

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