GB1202684A - Process for regenerating baths used in spinning acrylic threads - Google Patents

Process for regenerating baths used in spinning acrylic threads

Info

Publication number
GB1202684A
GB1202684A GB2989/69A GB298969A GB1202684A GB 1202684 A GB1202684 A GB 1202684A GB 2989/69 A GB2989/69 A GB 2989/69A GB 298969 A GB298969 A GB 298969A GB 1202684 A GB1202684 A GB 1202684A
Authority
GB
United Kingdom
Prior art keywords
phase
cumene
coagulating bath
water
essentially
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
GB2989/69A
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 GB1202684A publication Critical patent/GB1202684A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
    • C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
    • C10G21/12—Organic compounds only
    • C10G21/20—Nitrogen-containing compounds
    • 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
    • D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
    • D01F13/04—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of synthetic polymers
    • 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
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Artificial Filaments (AREA)

Abstract

1,202,684. Regenerating baths used in spinning acrylic threads. SOC. ITALIANA RESINE S.p.A. 17 Jan., 1969 [27 Jan., 1968], No. 2989/69. Heading B5B. Spinning baths used in making acrylonitrile polymer threads of 0À2 to 1À0 den. by extruding a solution of the polymer in dimethylformamide into a coagulating bath comprising cumene, D.M.F. and linear paraffins having 10 to 16 carbon atoms per molecule, and stretching the threads thereby formed in baths essentially comprising said paraffins, are regenerated by mixing together the solution enriched in impurities and D.M.F., which is discharged from the coagulating bath, with the solution enriched in cumene, D.M.F. and impurities, which is discharged from the stretching bath, subjecting the mixture to liquid/liquid extraction using D.M.F. as the solvent in order to separate a refined phase consisting essentially of paraffins and an extracted phase consisting essentially of cumene and dimethylformamide, recycling a fraction of the refined phase to the stretching bath after removing dimethylformamide therefrom by treatment with small proportions of water, recycling the remaining fraction of the refined phase as such to the coagulating bath, treating the extracted phase with water to separate an organic phase essentially comprising cumene and an aqueous phase containing D.M.F. and impurities, recycling the cumene phase to the coagulating bath, separating from the aqueous phase first water, and next D.M.F. by distillation, recycling the D.M.F. in part to to the extraction stage and in part to the coagulating bath, and utilizing the remaining dimethyl-formamide in preparing the spinning solution. The mixture of the solution discharged from the coagulating bath with the solution discharged from the stretching bath may be fed to an intermediate region between the top and foot of an extraction column, the D.M.F. extraction solvent being fed to the end of the column at which the refined phase is separated, so as to obtain an extracted phase essentially comprising cumene and D.M.F. and a refined phase essentially comprising paraffins. The D.M.F. used as solvent may contain 0À5 to 10% by weight of water. The aqueous phase containing D.M.F. and impurities may be freed from water first by distillation in vacuum and from D.M.F. next by a thin layer technique.
GB2989/69A 1968-01-27 1969-01-17 Process for regenerating baths used in spinning acrylic threads Expired GB1202684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1206468 1968-01-27

Publications (1)

Publication Number Publication Date
GB1202684A true GB1202684A (en) 1970-08-19

Family

ID=11139434

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2989/69A Expired GB1202684A (en) 1968-01-27 1969-01-17 Process for regenerating baths used in spinning acrylic threads

Country Status (5)

Country Link
US (1) US3641233A (en)
FR (1) FR1599554A (en)
GB (1) GB1202684A (en)
NL (1) NL6901076A (en)
YU (1) YU17069A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202100002324A1 (en) * 2021-02-03 2022-08-03 Montefibre Mae Tech S R L INTEGRATED AND IMPROVED PROCESS FOR THE PRODUCTION OF ACRYLIC FIBERS

Also Published As

Publication number Publication date
DE1903921B2 (en) 1975-09-11
YU17069A (en) 1979-10-31
US3641233A (en) 1972-02-08
NL6901076A (en) 1969-07-29
FR1599554A (en) 1970-07-15
DE1903921A1 (en) 1969-10-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee