GB1214540A - Method of regenerating spinning baths - Google Patents

Method of regenerating spinning baths

Info

Publication number
GB1214540A
GB1214540A GB5998868A GB5998868A GB1214540A GB 1214540 A GB1214540 A GB 1214540A GB 5998868 A GB5998868 A GB 5998868A GB 5998868 A GB5998868 A GB 5998868A GB 1214540 A GB1214540 A GB 1214540A
Authority
GB
United Kingdom
Prior art keywords
dmf
paraffins
cumene
separate
baths
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
GB5998868A
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.)
Societa Italiana Resine SpA SIR
Original Assignee
Societa Italiana Resine SpA SIR
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 Societa Italiana Resine SpA SIR filed Critical Societa Italiana Resine SpA SIR
Publication of GB1214540A publication Critical patent/GB1214540A/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
    • D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
    • D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
    • D01F11/06—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,214,540. Regenerating spinning baths. SOC. ITALIANA RESINE S.p.A. 17 Dec., 1968 [20 Dec., 1967], No. 59988/68. Heading B5B. Spinning baths used in making acrylonitrile copolymer threads, by extruding a dimethylformamide (DMF) solution of the polymer into a coagulating bath comprising cumene, DMF and linear paraffins having 10 to 16 carbon atoms and drawing the threads in baths mainly comprising the said paraffins, are regenerated by mixing the solution discharged from the coagulating bath, which contains raised quantities of impurities and DMF, more than 50% cumene, 15 to 35% DMF and up to 25% of the said paraffins, with the solution discharged from the drawing bath, which contains raised quantities of cumene and DMF, impurities and over 80% of the said paraffins, and adding to the mixed solution the cumene and paraffins which separate as the lighter phase from the thread wash baths. Then 5 to 9% by weight of the resulting mixture is treated with between 0À5 and 10 parts by weight of water per part by weight of DMF in the mix to separate an aqueous layer and an organic layer. Water is distilled from the aqueous layer and the residue is distilled by a thin layer technique to separate DMF, and the organic layer is fractioned to separate cumene from the paraffins. The cumene together with a DMF fraction and, if desired, paraffins, are added to an untreated fraction of the mix to restore the composition to the values of the coagulation feed, the said fraction being recycled to the coagulating bath, and the paraffins being recycled to the drawing bath. The remaining DMF is used in forming the spinning solution.
GB5998868A 1967-12-20 1968-12-17 Method of regenerating spinning baths Expired GB1214540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT817663 1967-12-20

Publications (1)

Publication Number Publication Date
GB1214540A true GB1214540A (en) 1970-12-02

Family

ID=11126006

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5998868A Expired GB1214540A (en) 1967-12-20 1968-12-17 Method of regenerating spinning baths

Country Status (1)

Country Link
GB (1) GB1214540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993012276A1 (en) * 1991-12-09 1993-06-24 Allied-Signal Inc. Method for removal of spinning solvent from spun fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993012276A1 (en) * 1991-12-09 1993-06-24 Allied-Signal Inc. Method for removal of spinning solvent from spun fiber

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee