GB704869A - Improved process for the continuous manufacture of artificial threads, fibres, filmsand such like products from viscose - Google Patents

Improved process for the continuous manufacture of artificial threads, fibres, filmsand such like products from viscose

Info

Publication number
GB704869A
GB704869A GB26181/50A GB2618150A GB704869A GB 704869 A GB704869 A GB 704869A GB 26181/50 A GB26181/50 A GB 26181/50A GB 2618150 A GB2618150 A GB 2618150A GB 704869 A GB704869 A GB 704869A
Authority
GB
United Kingdom
Prior art keywords
products
xanthogenate
per cent
ratio
threads
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
GB26181/50A
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.)
Onderzoekings Instituut Research
Original Assignee
Onderzoekings Instituut Research
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 Onderzoekings Instituut Research filed Critical Onderzoekings Instituut Research
Publication of GB704869A publication Critical patent/GB704869A/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

Abstract

In the manufacture of regenerated cellulose threads, films and like products from viscose, the cellulose xanthogenate still present in the products after they leave the spinning bath is decomposed by first treating the products with an aqueous solution containing an inorganic acid and at least one inorganic salt, in which the molar ratio of acid to neutral salt is below 1, and thereupon, after freeing the products from the bath liquid, e.g. by washing with water, treating the products with an acid aqueous solution containing no or very little salt. The process is characterized by the first treatment reducing the xanthogenate ratio of the products to about 0.10, by the second treatment taking place at not over 60 DEG C., preferably at room temperature, and by the second treatment being followed by a treatment with steam until the xanthogenate ratio of the products has decreased to 0.003 or less. Finally the products are desulphurized, e.g. by washing with water. The xanthogenate ratio is defined as the ratio of the total number of xanthogenate groups still present in the products to the total number of anhydro-glucose units therein. In the example threads from a spinning bath containing 8 per cent. of sulphuric acid and 14 per cent. of sodium sulphate are passed through a decomposition bath at 80 DEG C. containing 4 per cent. of sulphuric acid and 7 per cent. of sodium sulphate. The threads are stretched about 50 per cent. in this bath, then passed through a water bath at 20 DEG C. and thereafter through a 1 per cent. aqueous sulphuric acid solution at 25 DEG C. The threads are then passed through a long chamber supplied with saturated steam and finally washed with water at 50 DEG C. The low xanthogenate ratio of the thread substance after the treatment with steam enables a more rapid and complete desulphurizing and bleaching of the threads to be accomplished than in prior art processes, and the total steam consumption is reduced. Specification 692,023 is referred to.
GB26181/50A 1950-01-11 1950-01-01 Improved process for the continuous manufacture of artificial threads, fibres, filmsand such like products from viscose Expired GB704869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL292357X 1950-01-11

Publications (1)

Publication Number Publication Date
GB704869A true GB704869A (en) 1954-03-03

Family

ID=19782817

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26181/50A Expired GB704869A (en) 1950-01-11 1950-01-01 Improved process for the continuous manufacture of artificial threads, fibres, filmsand such like products from viscose

Country Status (6)

Country Link
BE (1) BE499146A (en)
CH (1) CH292357A (en)
DE (1) DE949429C (en)
FR (1) FR1027235A (en)
GB (1) GB704869A (en)
NL (1) NL71765C (en)

Also Published As

Publication number Publication date
CH292357A (en) 1953-08-15
DE949429C (en) 1956-09-20
BE499146A (en)
NL71765C (en)
FR1027235A (en) 1953-05-08

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