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WO1995024260A1 - Dispositif permettant de separer des melanges de substances ou de purifier des substances par pervaporation - Google Patents

Dispositif permettant de separer des melanges de substances ou de purifier des substances par pervaporation Download PDF

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Publication number
WO1995024260A1
WO1995024260A1 PCT/EP1995/000802 EP9500802W WO9524260A1 WO 1995024260 A1 WO1995024260 A1 WO 1995024260A1 EP 9500802 W EP9500802 W EP 9500802W WO 9524260 A1 WO9524260 A1 WO 9524260A1
Authority
WO
WIPO (PCT)
Prior art keywords
ester
chain
molecular weight
copolyether
forming equivalents
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.)
Ceased
Application number
PCT/EP1995/000802
Other languages
German (de)
English (en)
Inventor
Klaus Schneider
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.)
Akzo Nobel NV
Original Assignee
Akzo Nobel NV
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 Akzo Nobel NV filed Critical Akzo Nobel NV
Priority to EP95911293A priority Critical patent/EP0749351A1/fr
Priority to JP7523215A priority patent/JPH09509885A/ja
Publication of WO1995024260A1 publication Critical patent/WO1995024260A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
    • B01D61/362—Pervaporation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/48—Polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
    • B01D71/80—Block polymers

Definitions

  • the invention relates to a device for separating substance mixtures or for cleaning substances by means of pervaporation, membranes made of a polymer based on polyether esters being used as the membrane for the pervaporation.
  • the invention further relates to the use of polyether ester membranes for pervaporation.
  • the driving force is a pressure difference between the side on which the feed mixture is located and the side on which the permeate is located, ie the driving force is the difference between the saturation vapor pressures assigned to the operating temperature on the feed side (side of the feed mixture) and the Partial vapor pressure of the permeating components on the permeate side.
  • the membranes used for pervaporation belong to the type of membrane referred to as "dense” or “non-porous". More details about the pervaporation procedure are e.g. the "Membrane Handbook" by W.S. Winston Ho and Kamalesh K. Sirkar, published by van Nostrand Reinhold Verlag New York in 1992, and the book “Membrane Processes” by R. Rautenbach and R. Albrecht, published by John Wiley & Sons Ltd. Published in 1989. Numerous materials are used for pervaporation; In particular, numerous synthetic polymers are known which can be used as flat films or as hollow fibers for a wide variety of separation tasks by means of pervaporation.
  • European patent application 0 264 113 describes the pervaporation of phenols by means of non-porous membranes which consist of a number of elastic polymers or which are anion exchange membranes, among others.
  • the block copolymer "Hytrel 5556” a copolyether ester used primarily for the production of impact-resistant plastic articles.
  • a device for separating mixtures of substances or for cleaning substances by means of pervaporation the means for supplying the feed mixture or the substance to be cleaned, if appropriate for carrier gas and for removing permeate and retentate, and at least one membrane Has the basis of copolyether esters for separation by means of pervaporation, characterized in that the membrane is a non-porous, water vapor permeable, waterproof membrane made of a polymer based on hydrophilic copolyether ester.
  • Such polymers based on hydrophilic copolyether esters are particularly suitable polymers which are derived from longer-chain polyglycols, short-chain glycols, e.g. with 2 to 4 carbon atoms and dicarboxylic acids. These are preferably membranes based on a copolyether ester, which consists of a large number of recurring intralinear long-chain and short-chain ester units which are statistically linked head to tail via ester linkages, the long-chain ester units of the formula
  • G represents a divalent radical which remains after the removal of terminal hydroxyl groups from at least one long-chain glycol with an average molecular weight of 600 to 6000 and an atomic ratio of carbon to oxygen between 2.0 and 4.3, whereby at least 20% by weight of the long-chain glycol has an atomic ratio of carbon to oxygen between 2.0 and 2.4 and make up 15 to 50 percent by weight of the copolyetherester
  • R represents a divalent radical which, after removal of carboxyl groups from at least one dicarboxylic acid of molecular weight less than 300
  • D represents a divalent residue remaining after removal of hydroxyl groups from at least one diol of molecular weight less than 250, with at least 80 mole percent of the dicarboxylic acid used from terephthalic acid or its ester-forming equivalents and at least 80 mole percent d diols with the low molecular weight consist of 1,4-butanediol or its ester-forming equivalents, the sum of the molar percentages of the di
  • % of the diol used with a small molecular weight is 1,4-butanediol or its ester-forming equivalents and the sum of the molar percentages of the dicarboxylic acid which is not 2,6-naphthalenedicarboxylic acid or its ester-forming equivalents and of the diol with a small molecular weight , which is not 1,4-butanediol or its ester-forming equivalents, is at most 30% and the ester units with short chains make up 35 to 80% by weight of the copolyether ester.
  • opolyether ester which consists of a large number of repeat intralinear long-chain and short-chain Es units which are statistically linked via ester linkage head to tail, the long-chain ester units of the formula
  • G represents a divalent radical which, after removal of terminal hydroxyl groups from at least one long-chain glycol, has an average molecular weight of 600 to 4000 and an atomic ratio of carbon: oxygen between 2 and 4.3 remains, wherein at least 20 percent by weight of the long-chain glycol has an atomic ratio of carbon: oxygen between 2.0 and 2.4 and make up 15 to 50 percent by weight of the copolyetherester
  • R represents a divalent radical which, after the removal of carboxyl groups from at least one Dicarboxylic acid with a molecular weight of less than 300 remains
  • D represents a divalent radical which remains after the removal of hydroxyl groups from at least one diol with a molecular weight of less than 250, with at least 70 mol% of the dicarboxylic acid used from 2,6-naphthalenedicarboxylic acid or their ester-forming equivalents and at least 70 mol% of the diol with the low molecular weight consists of 1,4-butanediol or its ester
  • copolyether esters are described in more detail in Dutch patent application No. 9300723 dated April 28, 1993; the disclosure in this patent application is expressly referred to here.
  • the membranes used in the device can be flat membranes, tubular membranes and membranes in the form of hollow fibers.
  • Flat membranes can advantageously be used on a textile base such as a nonwoven, knitted or fabric base.
  • the membranes can be easily produced from solutions or from the melt by methods known per se.
  • the membranes can have a symmetrical or asymmetrical structure.
  • copolyetherester membranes can also be used as multilayer membranes. It is thus possible to use a support membrane as a base, which does not have to consist of copolyether ester, on which the actual copolyether ester separation membrane then rests, possibly with the interposition of a thin compensating layer.
  • Another object of the invention is the use of membranes from the above-mentioned polyether ester copolymers for pervaporation.
  • membranes made from such copolyether esters are very suitable for a wide variety of separation tasks using pervaporation.
  • the cleaning of substances, the separation of smaller amounts, the concentration of organic liquids by separating water or alcohols and phenols by means of pervaporation can be carried out in an excellent manner.
  • the most diverse areas of application such as food technology, environmental protection, waste water purification and the like. in question.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Polyesters Or Polycarbonates (AREA)

Abstract

L'invention concerne un dispositif permettant de séparer des mélanges de substances ou de purifier des substances par pervaporation. Ce dispositif comprend au moins une membrane de séparation par pervaporation. Ladite membrane est en polymère à base d'ester de copolyéther et est imperméable à l'eau, perméable à la vapeur d'eau et non poreuse. Les membranes peuvent se présenter sous forme de fibres creuses, de membranes tubulaires ou plates. Ces dernières s'utilisent de préférence en association avec un support en non tissé ou en tissu.
PCT/EP1995/000802 1994-03-11 1995-03-04 Dispositif permettant de separer des melanges de substances ou de purifier des substances par pervaporation Ceased WO1995024260A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95911293A EP0749351A1 (fr) 1994-03-11 1995-03-04 Dispositif permettant de separer des melanges de substances ou de purifier des substances par pervaporation
JP7523215A JPH09509885A (ja) 1994-03-11 1995-03-04 透析蒸発により物質混合物を分離もしくは物質を精製する装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4408311.4 1994-03-11
DE4408311 1994-03-11

Publications (1)

Publication Number Publication Date
WO1995024260A1 true WO1995024260A1 (fr) 1995-09-14

Family

ID=6512552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/000802 Ceased WO1995024260A1 (fr) 1994-03-11 1995-03-04 Dispositif permettant de separer des melanges de substances ou de purifier des substances par pervaporation

Country Status (3)

Country Link
EP (1) EP0749351A1 (fr)
JP (1) JPH09509885A (fr)
WO (1) WO1995024260A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005414A1 (fr) * 1996-08-07 1998-02-12 Gkss-Forschungszentrum Geesthacht Gmbh Membrane composite comportant un revetement de copolymeres sequences polyether-polyester, destinee a la separation de gaz polaires contenus dans des melanges gazeux
US5800997A (en) * 1996-11-01 1998-09-01 Novartis Finance Corporation Detection of maize fungal pathogens using the polymerase chain reaction
WO2000028807A1 (fr) * 1998-11-13 2000-05-25 Akzo Nobel N.V. Dispositif de pervaporation et mat d'irrigation
WO2001010192A1 (fr) * 1999-08-06 2001-02-15 E.I. Du Pont De Nemours And Company Dispositif d'irrigation
US6453610B2 (en) 1999-08-06 2002-09-24 E. I. Du Pont De Nemours And Company Method for modifying root growth
US6793824B2 (en) 1998-02-05 2004-09-21 E. I. Du Pont De Nemours And Company Water purification apparatus
EP1362833A3 (fr) * 1998-02-05 2005-01-19 E.I. Du Pont De Nemours And Company Appareil de purification d'eau
US7258767B2 (en) * 2000-01-17 2007-08-21 Akzo Nobel N.V. Solar dew tube
US7494572B2 (en) * 1999-08-06 2009-02-24 Design Technology And Innovation Ltd. Water still and method of operation thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545451A1 (fr) * 1991-11-18 1993-06-09 ENICHEM S.p.A. Copolyétheresters élastomères segmentés à hautes charactéristiques technologiques
US5221481A (en) * 1990-12-06 1993-06-22 Exxon Research And Engineering Company Multi-block polymer comprising an ester prepolymer, made by combining epoxy with polyester, chain extended with a compatible second prepolymer, the membrane made therefrom and its use for separations
EP0622488A1 (fr) * 1993-04-28 1994-11-02 Akzo Nobel N.V. Vêtement de pluie imperméable apte à la respiration et objets imperméables en matière plastique expansée

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5221481A (en) * 1990-12-06 1993-06-22 Exxon Research And Engineering Company Multi-block polymer comprising an ester prepolymer, made by combining epoxy with polyester, chain extended with a compatible second prepolymer, the membrane made therefrom and its use for separations
EP0545451A1 (fr) * 1991-11-18 1993-06-09 ENICHEM S.p.A. Copolyétheresters élastomères segmentés à hautes charactéristiques technologiques
EP0622488A1 (fr) * 1993-04-28 1994-11-02 Akzo Nobel N.V. Vêtement de pluie imperméable apte à la respiration et objets imperméables en matière plastique expansée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
D. J. LYMAN ET AL.: "NEW SYNTHETIC MEMBRANES FOR DIALYSIS. 1. A COPOLYETHER-ESTER MEMBRANE SYSTEM", BIOCHEMISTRY, vol. 3, no. 7, pages 985 - 990 *

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998005414A1 (fr) * 1996-08-07 1998-02-12 Gkss-Forschungszentrum Geesthacht Gmbh Membrane composite comportant un revetement de copolymeres sequences polyether-polyester, destinee a la separation de gaz polaires contenus dans des melanges gazeux
US5800997A (en) * 1996-11-01 1998-09-01 Novartis Finance Corporation Detection of maize fungal pathogens using the polymerase chain reaction
US6071698A (en) * 1996-11-01 2000-06-06 Novartis Finance Corporation DNA extraction buffer and method of use thereof
EP2028159A3 (fr) * 1998-02-05 2009-04-22 Design Technology and Innovation Limited Appareil de purification d'eau
US7166224B2 (en) 1998-02-05 2007-01-23 Design Technology And Innovation Limited Water purification apparatus
US6887385B2 (en) 1998-02-05 2005-05-03 E. I. Du Pont De Nemours And Company Water purification apparatus
EP1362833A3 (fr) * 1998-02-05 2005-01-19 E.I. Du Pont De Nemours And Company Appareil de purification d'eau
US6793824B2 (en) 1998-02-05 2004-09-21 E. I. Du Pont De Nemours And Company Water purification apparatus
US6679991B1 (en) 1998-11-13 2004-01-20 Akzo Nobel N.V. Pervaporation device and irrigation mat
WO2000028807A1 (fr) * 1998-11-13 2000-05-25 Akzo Nobel N.V. Dispositif de pervaporation et mat d'irrigation
AU770534B2 (en) * 1999-08-06 2004-02-26 Design Technology And Irrigation Limited Irrigation device
EP1400166A1 (fr) * 1999-08-06 2004-03-24 E.I. Du Pont De Nemours And Company Méthode de collecte de substances exsudées par les racines des plantes
US6615537B2 (en) 1999-08-06 2003-09-09 E. I. Du Pont De Nemours And Company Method of collecting materials exuded from plant roots
US6484439B1 (en) 1999-08-06 2002-11-26 E.I. Du Pont De Nemours And Company Irrigation device
US6453610B2 (en) 1999-08-06 2002-09-24 E. I. Du Pont De Nemours And Company Method for modifying root growth
EP1530896A3 (fr) * 1999-08-06 2005-05-25 E.I. du Pont de Nemours and Company Dispositif d'enracinement et son utilisation
WO2001010192A1 (fr) * 1999-08-06 2001-02-15 E.I. Du Pont De Nemours And Company Dispositif d'irrigation
US7494572B2 (en) * 1999-08-06 2009-02-24 Design Technology And Innovation Ltd. Water still and method of operation thereof
US7258767B2 (en) * 2000-01-17 2007-08-21 Akzo Nobel N.V. Solar dew tube

Also Published As

Publication number Publication date
JPH09509885A (ja) 1997-10-07
EP0749351A1 (fr) 1996-12-27

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