US3337670A - Process of recovering the constituents of a polyvinyl chloride coagulating bath - Google Patents

Process of recovering the constituents of a polyvinyl chloride coagulating bath Download PDF

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Publication number
US3337670A
US3337670A US317113A US31711363A US3337670A US 3337670 A US3337670 A US 3337670A US 317113 A US317113 A US 317113A US 31711363 A US31711363 A US 31711363A US 3337670 A US3337670 A US 3337670A
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United States
Prior art keywords
solvent
coagulating bath
water
bath
azeotropic mixture
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Expired - Lifetime
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US317113A
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English (en)
Inventor
Gord Louis
Michel Fleury
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Rhovyl SA
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Rhovyl SA
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Publication date
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    • 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
    • D01F6/08—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 halogenated hydrocarbons
    • D01F6/10—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 halogenated hydrocarbons from polyvinyl chloride or polyvinylidene chloride
    • 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

Definitions

  • the process of the present invention makes it possible to recover in a very simple manner the constituents of the coagulation baths.
  • the new process comprises extruding a solution of a vinyl chloride polymer in cyclopentanone or cyclohexanone into an azeotropic mixture of water and a monohydric aliphatic alcohol containing three or four carbon atoms, preferably isopropyl alcohol, n-propyl alcohol or sec-butyl alcohol.
  • the aliphatic alcohol distils first as an azeotrope with water, and may be immediately returned as such into the spinning bath, since it has the appropriate composition.
  • the solvent for the vinyl chloride polymer e.g. cyclopentanone or cyclohexanone
  • the solvent for the vinyl chloride polymer is recovered in the anhydrous state from the bottom of the distillation column and can be reused immediately for dissolving more polyvinyl chloride.
  • This ready separation of the constituents of the spinning bath and the possibility of immediately reusing them make it possible to use only small quantities of solvent and aliphatic alcohol.
  • vinyl chloride polymer is used herein to denote, besides polyvinyl chloride itself, polyvinyl chloride copolymers containing a major proportion of polyvinyl chloride, and derivatives of polyvinyl chloride obtained by superchlorination.
  • the spinning solutions may optionally contain substances intended to modify certain of the mechanical, physical, and chemical or dyeing properties of the filaments produced.
  • the yarns and fibres obtained by the process of the invention may be finished in any appropriate operation and may be used alone, or blended with other natural or artificial (including wholly synthetic) fibres, in weaving or knitting or for the production of unwoven articles.
  • EXAMPLE 1 A crystalline polyvinyl chloride polymer, obtained by polymerization at 15 C. and having an Afnor index of 3,337,670 Patented Aug. 22, 1967 130 (index determined at 25 C. in cy-clohexanone in accordance with the French standard NF T 51013), is dissolved in cyclohexanone to form a 25% solution. This solution is then heated to 140 C. and extruded through a spinneret having 260 holes each of a diameter of 0.06 mm. into a first bath having the composition of an isopropyl alcohol/water azeotrope (12.7% of water).
  • the length of the bath is cm., the temperature 50 C., and the speed of the filaments leaving the bath is 13 m./ minute.
  • the filaments then enter a second bath 15 cm. long of the same composition and temperature as the first. They leave this bath also at 13 m./ minute.
  • the filaments next enter a third bath identical to the second one, and a fourth bath, which is also the same except that its length is 20 cm.
  • the filaments enter a fifth bath 20 cm. long consisting of water at C.
  • the filaments are wound up at 30 m./min. and then stretched three times their length in hot air at C.
  • the filaments finally obtained have a breaking strength of 2.8 g./ den. and an elongation at break of 17%.
  • the various components of the coagulation baths are recovered by fractional distillation.
  • the isopropyl alcohol is recovered as its azeotrope with Water and the substantially anhydrous cyclohexanone is recovered in directly reusable form.
  • EXAMPLE 2 A 25% polyvinyl chloride solution in cyclopentanone is wet-spun into a coagulation bath having the composition of the n-propyl alcohol/water azeotrope (27% of water). The components of the coagulation baths are thereafter recovered as in Example 1, by fractional distillation. The azeotrope of the n-propyl alcohol, which boils at 87 C., separates immediately from the cyclopentanone, which boils at C.
  • EXAMPLE 3 A 12% solution in cyclohexanone of a vinyl chloride polymer having an Afnor index of 500 is wet-spun, using as coagulation bath the azeotrope of sec-butyl alcohol (30% of water). The various components of the coagulation baths are thereafter recovered, as in the preceding examples, by fractional distillation. The azeotrope of the sec-butyl alcohol, which boils at 88.5 C., separates immediately from the cyclohexanone which boils at 156 C.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Artificial Filaments (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
US317113A 1962-10-23 1963-10-18 Process of recovering the constituents of a polyvinyl chloride coagulating bath Expired - Lifetime US3337670A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR913141A FR1345068A (fr) 1962-10-23 1962-10-23 Procédé de filage humide de solutions de polymères à base de chlorure de vinyle

Publications (1)

Publication Number Publication Date
US3337670A true US3337670A (en) 1967-08-22

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ID=8789296

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US317113A Expired - Lifetime US3337670A (en) 1962-10-23 1963-10-18 Process of recovering the constituents of a polyvinyl chloride coagulating bath

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US (1) US3337670A (enrdf_load_html_response)
BE (1) BE638968A (enrdf_load_html_response)
DE (1) DE1251904B (enrdf_load_html_response)
ES (1) ES291566A1 (enrdf_load_html_response)
FR (2) FR1345068A (enrdf_load_html_response)
GB (1) GB985729A (enrdf_load_html_response)
NL (2) NL299515A (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440148A (en) * 1965-01-27 1969-04-22 Acsa Applic Chimiche Spa Method for recovering the components of a coagulation bath used in the spinning of polyvinyl chloride
US3457343A (en) * 1965-08-28 1969-07-22 Algemeine Kunstzijde Unie Nv Wet spinning process

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5248471A (en) * 1987-07-06 1993-09-28 Alliedsignal Inc. Process for forming fibers
WO2010106143A1 (en) 2009-03-20 2010-09-23 Dsm Ip Assets B.V. Net for aquaculture

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2327872A (en) * 1940-07-01 1943-08-24 Pro Phylae Tic Brush Company Method of making synthetic materials such as fibers
US2953818A (en) * 1958-02-14 1960-09-27 Du Pont Process for producing polyvinyl fluoride film from mixture of polyvinyl fluoride particles and latent solvent therefor
US3078242A (en) * 1957-09-30 1963-02-19 Du Pont Composition comprising a solution of an organic compound containing two reactive groups and a polymer in the form of particles below about 15 microns

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2327872A (en) * 1940-07-01 1943-08-24 Pro Phylae Tic Brush Company Method of making synthetic materials such as fibers
US3078242A (en) * 1957-09-30 1963-02-19 Du Pont Composition comprising a solution of an organic compound containing two reactive groups and a polymer in the form of particles below about 15 microns
US2953818A (en) * 1958-02-14 1960-09-27 Du Pont Process for producing polyvinyl fluoride film from mixture of polyvinyl fluoride particles and latent solvent therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440148A (en) * 1965-01-27 1969-04-22 Acsa Applic Chimiche Spa Method for recovering the components of a coagulation bath used in the spinning of polyvinyl chloride
US3457343A (en) * 1965-08-28 1969-07-22 Algemeine Kunstzijde Unie Nv Wet spinning process

Also Published As

Publication number Publication date
BE638968A (enrdf_load_html_response) 1900-01-01
ES291566A1 (es) 1964-01-16
NL133195C (enrdf_load_html_response) 1900-01-01
GB985729A (en) 1965-03-10
FR1345068A (fr) 1963-12-06
NL299515A (enrdf_load_html_response) 1900-01-01
DE1251904B (de) 1967-10-12
FR87296E (fr) 1966-07-08

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