GB1090528A - Process for the regeneration of solvents - Google Patents

Process for the regeneration of solvents

Info

Publication number
GB1090528A
GB1090528A GB40425/66A GB4042566A GB1090528A GB 1090528 A GB1090528 A GB 1090528A GB 40425/66 A GB40425/66 A GB 40425/66A GB 4042566 A GB4042566 A GB 4042566A GB 1090528 A GB1090528 A GB 1090528A
Authority
GB
United Kingdom
Prior art keywords
solvent
stage
column
liquid
sump
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
GB40425/66A
Inventor
Eberhard Peter
Hans Joachim Godau
Dietrich Riedel
Wilfred Planke
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.)
ENGELS CHEMIEFASERWERK VEB
Original Assignee
ENGELS CHEMIEFASERWERK VEB
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 ENGELS CHEMIEFASERWERK VEB filed Critical ENGELS CHEMIEFASERWERK VEB
Publication of GB1090528A publication Critical patent/GB1090528A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/42—Nitriles
    • C08F20/44—Acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/36—Polymerisation in solid state
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/02—Recovery or working-up of waste materials of solvents, plasticisers or unreacted monomers
    • 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
    • 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)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Artificial Filaments (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

In a process for recovering dimethyl formamide or dimethyl acetamide, used as solvent for spinning polyacrylonitrile, from an aqueous solution containing the solvent, wherein the solution is distilled in a fractionating column from which the purified solvent is withdrawn as a lower side stream while water is removed from the head, the sump liquid, comprising solvent contaminated with the corresponding carboxylic acid, cracked polyacrylonitrile and inorganic salts, is submitted to multi-stage evaporation whereby purified solvent is obtained as distillate from the first stage, and the distillate(s) from the subsequent stage(s) is (are) added to the feed to the column. In an example, the column is operated under an absolute pressure of 360 mm. Hg., and at a sump temperature of 136 DEG C. The sump liquid is submitted to a two-stage evaporation process in the form of a liquid-film under an absolute pressure of 100 mm. Hg.
GB40425/66A 1966-08-23 1966-09-09 Process for the regeneration of solvents Expired GB1090528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1966V0031781 DE1669559A1 (en) 1966-08-23 1966-08-23 Process for the regeneration of solvents used for the production of solutions from polyacrylonitrile

Publications (1)

Publication Number Publication Date
GB1090528A true GB1090528A (en) 1967-11-08

Family

ID=7586702

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40425/66A Expired GB1090528A (en) 1966-08-23 1966-09-09 Process for the regeneration of solvents

Country Status (4)

Country Link
BE (1) BE686731A (en)
DE (1) DE1669559A1 (en)
GB (1) GB1090528A (en)
NL (1) NL6615608A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100342986C (en) * 2004-12-22 2007-10-17 哈尔滨工业大学 Method for reclaiming dimethyl acetamide from cefoperazone sodium production waste liquid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4319534A1 (en) * 1993-06-12 1994-12-15 Hoechst Ag Process for working up solvent mixtures containing high-boiling constituents and device suitable therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100342986C (en) * 2004-12-22 2007-10-17 哈尔滨工业大学 Method for reclaiming dimethyl acetamide from cefoperazone sodium production waste liquid

Also Published As

Publication number Publication date
DE1669559A1 (en) 1971-01-28
NL6615608A (en) 1968-05-06
BE686731A (en) 1967-02-15

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