WO2001066249A2 - Fibres d'immobilisation des resines d'echange d'ion - Google Patents

Fibres d'immobilisation des resines d'echange d'ion Download PDF

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Publication number
WO2001066249A2
WO2001066249A2 PCT/US2001/006728 US0106728W WO0166249A2 WO 2001066249 A2 WO2001066249 A2 WO 2001066249A2 US 0106728 W US0106728 W US 0106728W WO 0166249 A2 WO0166249 A2 WO 0166249A2
Authority
WO
WIPO (PCT)
Prior art keywords
fiber
internal cavity
lobes
fluid
ion exchange
Prior art date
Application number
PCT/US2001/006728
Other languages
English (en)
Other versions
WO2001066249A3 (fr
Inventor
Peter D. Unger
Russell A. Dondero
Daniel Bause
Ronald P. Rohrbach
Lixin L. Xue
Gordon W. Jones
Original Assignee
Honeywell International Inc.
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 Honeywell International Inc. filed Critical Honeywell International Inc.
Priority to EP01911217A priority Critical patent/EP1259323A2/fr
Priority to JP2001564893A priority patent/JP2003525739A/ja
Publication of WO2001066249A2 publication Critical patent/WO2001066249A2/fr
Publication of WO2001066249A3 publication Critical patent/WO2001066249A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J47/00—Ion-exchange processes in general; Apparatus therefor
    • B01J47/12—Ion-exchange processes in general; Apparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes
    • B01J47/127—Ion-exchange processes in general; Apparatus therefor characterised by the use of ion-exchange material in the form of ribbons, filaments, fibres or sheets, e.g. membranes in the form of filaments or fibres

Definitions

  • the present invention relates generally to the immobilization of ion exchange resins, and more particularly to wicking fibers having an ion exchange resin disposed on an exterior surface thereof for, among other things, selectively removing dissolved materials contained within a fluid.
  • Ion exchange is a process that removes detrimental ions (e.g., lead, copper, and so forth) from water and replaces them with less damaging ions .
  • Ion exchange can most simply be described as the interchange of ions present in a liquid with those present on an insoluble solid with which the liquid comes into contact.
  • the insoluble solid ion exchange particle takes the form of a synthetic ion exchange resin bead.
  • each resin bead is a porous polymer matrix containing many ion exchange sites both on the bead surface and within the matrix.
  • Ion exchange can only take place between ions of the same charge, namely anions for anions and cations for cations. Therefore, resins have to be charge specific, with some resins specifically designed for anion exchange, and others for cation exchange. Anion exchange resins have positively-charged exchange sites with anions attached, and cation exchange resins have negatively- charged exchange sites with cations attached.
  • the resin sites are usually regenerated with low affinity cations, usually sodium or hydrogen ions. As virtually all other cations have a greater affinity for the exchange sites, the sodium or hydrogen ions are readily exchanged off the resin.
  • the process for anion exchange is similar, except anion • resins are regenerated with chloride or hydroxyl ions.
  • ions can have different electric charges, which has an impact on the ion exchange at the molecular level.
  • a monovalent ion has a single charge, divalent ions have two charges, trivalent ions have three charges, and so on.
  • the net charge on a resin bead must remain neutral, so one divalent ion of greater affinity will displace two lower affinity monovalent ions.
  • two monovalent ions are required to displace one divalent ion.
  • the ion exchange resin is more selective for divalent and trivalent ions than for monovalent ions.
  • the regeneration of ion exchange resins is conventionally accomplished through the introduction of regenerating ions in concentrations much greater than those found in the untreated water. In a concentrated solution, the resin will be more selective for the monovalent ions . This overabundance of low affinity ions allows them to displace higher affinity ions by sheer kinetic brute force.
  • an apparatus for removing a dissolved material contained within a fluid comprising: at least one fiber; wherein the at least one fiber is comprised of an elongated fiber having multiple lobes with a longitudinally extending internal cavity including an opening from the internal cavity to an outer fiber formed between adj acent lobes ; wherein the at least one fiber has at least one material disposed on an external surface thereof; wherein the at least one material has a high affinity for the dissolved material and is capable of removing the dissolved material from the fluid.
  • an apparatus for chelating an ionic species contained within a fluid comprising: at least one fiber; wherein the at least one fiber is comprised of an elongated fiber having multiple lobes with a longitudinally extending internal cavity including an opening from the internal cavity to an outer fiber formed between adjacent lobes; wherein the at least one fiber has at least one material disposed on an external surface thereof; wherein the at least one material has a high affinity for the ionic species and is capable of chelating the ionic species .
  • a method for removing a dissolved material contained within a fluid comprising: providing at least one fiber, wherein the at least one fiber is comprised of an elongated fiber having multiple lobes with a longitudinally extending internal cavity including an opening from the internal cavity to an outer fiber formed between adjacent lobes, wherein the at least one fiber has at least one material disposed on an external surface thereof, wherein the at least one material has a high affinity for the dissolved material; and passing the fluid through the at least one fiber; wherein the at least one material removes the dissolved material from the fluid.
  • FIG. 1 is a perspective view showing a wicking fiber which is suitable for practicing the invention
  • FIG. 2 is a graphical illustration of the results of a copper breakthrough analysis.
  • the present invention is useful for removing dissolved material contained in a fluid material.
  • the present invention is based on the use of complex cross-section fibers to entrap and hold various materials, such as but not limited to ion exchange resins, and chromatographic materials such as, but not limited to metal affinity chromatography media, and the like.
  • the present invention employs a class of fibrous materials which have the ability to hold an impregnated material due to the nature of their unique cross-section. These fibers can be made into a variety of configurations, either of the woven or nonwoven varieties.
  • suitable fibers include, without limitation, elongated fibers having multiple lobes with a longitudinally extending internal cavity including an opening from the internal cavity to the outer fiber formed between adjacent lobes .
  • Apparatus For The Continuous Capturing And Removal Of Gas Molecules ⁇ and issued to Rohrbach et al . describes a filtration method and device which continuously removes several gas phase contaminants from an air stream through the use of partially hollow wicking fibers impregnated with a selected liquid which can capture the gas phase contaminants .
  • a filter media is composed of a plurality of wicking fibers each of which comprise a strand with a hollow region impregnated with any of a variety of liquid phase absorbing systems made from the combination of a carrier liquid and soluble complexing/degrading agent or agents.
  • the filter media may be made from any of a variety of fibers which can rapidly transport a liquid phase by the nature of either their geometry or their chemical composition. Geometries may include multilobal cross-sectional configurations, porous hollow fibers, porous or striated fibers or tightly bundled microfibers, all of which exhibit the property of wicking fluid from an external source .
  • the impregnated or pregnant fibers can either be formed into fibrous mats, sheets, or webs by any number of conventional methods, or alternatively, the pregnant fibers can be mechanically incorporated (e.g., disposed) onto and/or within a conventional fibrous mat, sheet, or web (typically comprised of a plurality of entangled non- woven fibers) .
  • the resulting fibrous mat whether comprised of, or incorporating, pregnant fibers is a low density, high pore volume material (e.g., 50% pore volume for fibers) .
  • the high pore volume is preferred so as to allow the proper level of fluid flow through the fibrous mat without a significant pressure drop occurring.
  • the fiber 10 has a cross-section with a central core 12 and three (or alternatively four) T-shaped lobes 14 that terminate on an external wall member 16.
  • the legs of the lobes 14 intersect at the core 12 so that the angle between the legs of the adjacent lobes 14 is from about 80° to 130°.
  • the thermoplastic polymer is typically a polyamide, a polyester, a polyolefin or a combination thereof.
  • the fiber 10 as illustrated in the FIGURE is formed as an extruded strand having three hollow interior longitudinally extending cavities 18 each of which communicates with the outer strand surface by way of longitudinally extending slots 20 which are defined between the outer ends of the T-shaped lobes 14.
  • the extractant 22 for capturing dissolved material for example, is applied in any number of conventional methods to at least a portion of one or more surfaces of the cavities 18.
  • the extractant 22 can include ion exchange resins, immobilizing agents, chelating agents, and so forth.
  • the wicking fibers of the present invention are capable of immobilizing an extractant within the microchannels (e.g., cavities) of the wicking fiber without the use of adhesives or binders. This entrapment is very strong, as mechanical vibration and air flow studies have indicated. It has been shown that carbon particles entrapped within the wicking fiber can withstand extremely high liquid flow rates exceeding 500 bed volumes per minute .
  • an extractant or other like material is disposed on an external surface of the wicking fibers of the present invention, and more preferably in the cavities of the wicking fiber.
  • ⁇ extractant ⁇ as used herein, it is meant any material that is capable of removing another material contained in a fluid or solid.
  • the extractant preferably captures, chelates, or immobilizes various materials, such as, but not limited to ionic species, and the like.
  • liquid chelators i.e., chelating agents
  • EXAMPLE Wicking fiber in accordance with one embodiment of the present invention, was impregnated with Moc-45, a selective ketoxime copper extractant.
  • the fiber used in this example was in the form of a nonwoven fabric made from polypropylene polymer and has a weight basis of approximately 3 ounces per cubic yard. A sheet of this fabric (50 cm X 18 cm) was immersed in the Moc-45 liquid extractant in order to wet thoroughly. The excess liquid was removed from the fabric by compressing the wetted mat and allowing the excess fluid to drain away by gravity. The impregnated fiber mat was then allowed to air dry in a hood under airflow for a period of approximately 16-18 hours.
  • the purpose of the drying step was to remove excess volatile kerosene carrier from the metal extractant mixture .
  • the impregnated wicking fiber fabric was then laid over a polypropylene screen mesh support and rolled tightly into a tube or ⁇ Jellyroll ⁇ .
  • the tightly rolled tube was then inserted into a glass Kontes column (2.3 cm X 25 cm) , and the glass column was then fitted with inlet and outlet tubing connectors to allow introduction of a fluid process stream.
  • the final weight of impregnated wicking fiber in the column was calculated to be 12.48 g.
  • the wicking fiber bed occupied a space of 2.3 cm diameter by a bed height of 17 cm, yielding a volume of about 104 cubic cm.
  • the column freeboard was approximately 33 cubic cm.
  • the final calculated fabric loading was approximately 0.127 g of Moc-45 extractant per cubic cm of bed volume .
  • Copper breakthrough analysis was performed by passing an aqueous solution of 2 g/1 copper sulfate over the. column packed with the Moc-45-impregnated wicking fiber, described above. The copper solution was pumped over the column at flow rates of 20 to 45 bed volumes/hour, and copper in the effluent stream was measured by UV absorbance at 254 nm. Results of one breakthrough analysis are shown in Figure 2. Following loading of the metal extractant with copper, the column was washed with water, and then the copper was stripped from the extractant using a solution of 1/8 M sulfuric acid in water. Following the acid stripping, the column was neutralized with water to prepare the extractant for another round of loading.
  • any type of material that is used to selectively remove a dissolved material, such as an ionic species (e.g., anions and/or cations) from a fluid can be used, such as, but not limited to ion exchange resins, chelating agents, immobilizing agents, and the like.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Treatment Of Liquids With Adsorbents In General (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne une fibre mèche utilisée dans l'immobilisation de résines d'échange d'ion. Un milieu filtrant comprend au moins une fibre pourvue d'un matériau liquide ou solide sur sa surface extérieure. Cette fibre peut comporter des structures, telles qu'une fibre de forme allongée possédant plusieurs lobes à cavité interne s'étendant de façon longitudinale et comprenant une ouverture allant de la cavité interne à la fibre externe formée entre des lobes adjacents. Le matériau pouvant être placé dans la cavité interne de la fibre, présente une forte affinité pour un matériau soluble ou dissous afin d'attirer et retenir fortement le matériau soluble ou dissous, tout en ne provoquant simultanément aucune chute de pression importante dans le milieu filtrant.
PCT/US2001/006728 2000-03-03 2001-03-01 Fibres d'immobilisation des resines d'echange d'ion WO2001066249A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01911217A EP1259323A2 (fr) 2000-03-03 2001-03-01 Fibres d'immobilisation des resines d'echange d'ion
JP2001564893A JP2003525739A (ja) 2000-03-03 2001-03-01 イオン交換樹脂を固定するための繊維

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51862100A 2000-03-03 2000-03-03
US09/518,621 2000-03-03

Publications (2)

Publication Number Publication Date
WO2001066249A2 true WO2001066249A2 (fr) 2001-09-13
WO2001066249A3 WO2001066249A3 (fr) 2001-12-20

Family

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Family Applications (1)

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PCT/US2001/006728 WO2001066249A2 (fr) 2000-03-03 2001-03-01 Fibres d'immobilisation des resines d'echange d'ion

Country Status (3)

Country Link
EP (1) EP1259323A2 (fr)
JP (1) JP2003525739A (fr)
WO (1) WO2001066249A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10465926B2 (en) 2014-07-22 2019-11-05 Johnson Controls Technology Company System and method for continuously removing a particular type of gas molecules from a gas stream

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4990724B2 (ja) * 2007-08-31 2012-08-01 クリタック株式会社 水質調整装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944485A (en) * 1973-05-23 1976-03-16 California Institute Of Technology Ion-exchange hollow fibers
US5759394A (en) * 1996-11-27 1998-06-02 Alliedsignal Inc. Elongate fiber filter mechanically securing solid adsorbent particles between adjacent multilobes
WO1999019523A1 (fr) * 1997-10-14 1999-04-22 Alliedsignal Inc. Systeme fibreux comportant des fibres meches impregnees d'un agent d'extraction permettant de capter en continu des metaux a partir d'un courant aqueux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944485A (en) * 1973-05-23 1976-03-16 California Institute Of Technology Ion-exchange hollow fibers
US5759394A (en) * 1996-11-27 1998-06-02 Alliedsignal Inc. Elongate fiber filter mechanically securing solid adsorbent particles between adjacent multilobes
WO1999019523A1 (fr) * 1997-10-14 1999-04-22 Alliedsignal Inc. Systeme fibreux comportant des fibres meches impregnees d'un agent d'extraction permettant de capter en continu des metaux a partir d'un courant aqueux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10465926B2 (en) 2014-07-22 2019-11-05 Johnson Controls Technology Company System and method for continuously removing a particular type of gas molecules from a gas stream
US11326791B2 (en) 2014-07-22 2022-05-10 Johnson Controls Tyco IP Holdings LLP System and method for continuously removing a particular type of gas molecules from a gas stream

Also Published As

Publication number Publication date
JP2003525739A (ja) 2003-09-02
WO2001066249A3 (fr) 2001-12-20
EP1259323A2 (fr) 2002-11-27

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