WO2003106757A1 - Fibres de chelation et traitement a l'aide de ces fibres d'une eau contenant des ions metalliques - Google Patents

Fibres de chelation et traitement a l'aide de ces fibres d'une eau contenant des ions metalliques Download PDF

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Publication number
WO2003106757A1
WO2003106757A1 PCT/JP2003/007459 JP0307459W WO03106757A1 WO 2003106757 A1 WO2003106757 A1 WO 2003106757A1 JP 0307459 W JP0307459 W JP 0307459W WO 03106757 A1 WO03106757 A1 WO 03106757A1
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Prior art keywords
fiber
chelate
group
acid
forming
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PCT/JP2003/007459
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English (en)
Japanese (ja)
Inventor
南部　信義
伊藤　治
土井　貴雄
Original Assignee
中部キレスト株式会社
キレスト株式会社
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Publication of WO2003106757A1 publication Critical patent/WO2003106757A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M14/00—Graft polymerisation of monomers containing carbon-to-carbon unsaturated bonds on to fibres, threads, yarns, fabrics, or fibrous goods made from such materials
    • 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
    • B01J45/00—Ion-exchange in which a complex or a chelate is formed; Use of material as complex or chelate forming ion-exchangers; Treatment of material for improving the complex or chelate forming ion-exchange properties
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • C02F1/683—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of complex-forming compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds

Definitions

  • the present invention relates to a chelate-forming fiber obtained by modifying a fiber, and a method for treating a metal ion-containing water using the fiber.
  • ion exchange resins are widely used to remove or trap metal ions contained in water and wastewater, but the effect of selectively adsorbing low-concentration metal ions can always be satisfied. Not a thing.
  • chelating resins that have the property of forming chelates with metal ions and selectively capturing them have excellent selective capturing ability for metal ions, especially heavy metal ions. Therefore, it has been put to practical use in the field of water treatment for removing and capturing heavy metals.
  • most of the chelating resin is in the form of beads and therefore has high hydrophobicity, and the diffusion rate of metal ions and regenerant (eluent) into the resin is low, so that the processing efficiency is low.
  • Japanese Patent No. 2772010 proposes a fibrous chelating resin.
  • the fibrous chelating resin has a large surface area, and exhibits high absorption / desorption ability because of the presence of a chelate-forming functional group serving as a metal ion adsorption point or desorption point on the surface.
  • the base material is a polymer of olefin-halogenated olefin, it is difficult to incinerate it, and moreover, there arises a problem that toxic gas such as dioxin is generated during the incineration treatment.
  • a chelate-forming functional group such as an aminopolycarbonic acid or a phosphoric acid type is introduced into a molecule of a natural fiber or a synthetic fiber. Or metal ions can be efficiently removed, captured or concentrated and recovered.
  • the use of a cross-linking reactive compound such as glycidyl acrylate enables simple and easy formation of any chelate-forming functional group in the molecule of natural fiber. Can be introduced efficiently in a secure way.
  • the chelating functional group to be introduced is selected, it is possible to obtain sufficient selective adsorption and adsorption rates for various metals, and its use will be greatly expanded. Be expected.
  • Chelate-forming fibers having a chelate-forming functional group introduced into the molecule of a natural fiber are extremely excellent in selective adsorption property and adsorption rate.
  • the chelate capturing ability may not be sufficiently exhibited.
  • the chelating functional group is naturally exerted by introducing the chelating functional group. In some cases, the required ability to capture chelate may not be exhibited effectively.
  • the present invention is directed to a chelate forming fiber having an acid type chelate forming functional group introduced into a fiber molecule, as disclosed in the above-mentioned publications and the like, and modifying this.
  • a treatment method that can capture metal ions more efficiently using the chelate-forming fibers is developed. It is to provide.
  • the chelate-forming fiber of the present invention which can solve the above-mentioned problem is an alkali metal salt type or an ammonium salt type aminopolycarboxylic acid group and / or a phosphoric acid group. It has a characteristic that it is introduced into fiber molecules as a functional group.
  • Another configuration of the present invention is to use a chelating fiber into which an acid-type chelating functional group is introduced to capture and remove metal ions from water containing metal ions more efficiently. It provides a possible treatment method, in which the acid-type functional group introduced into the chelate-forming fiber is converted into an alkali metal salt type or an ammonium salt type, and then treated by contact with water containing metal ions. It has a gist here.
  • particularly preferable chelate-forming functional groups to be introduced into fiber molecules are aminopolycarboxylic acid groups or phosphoric acid groups.
  • Acid groups among which imino acetic acid groups, tri-triacetic acid groups, Ethylene diamine triacetate, ethylene diamine tetraacetate, diethylene triamine pentaacetate, glutamate diacetate, and ethyl diamine nicosinate are optimal, and these alone may be present in the fiber molecule.
  • two or more kinds can be introduced in combination as needed.
  • Alkali metal salts for converting the acid-type chelate-forming functional group into a salt form include sodium salts and potassium salts from the viewpoints of the ability to capture metal ions, economy, and harmlessness. Lithium salt is optimal.
  • the chelate-forming functional group is converted to an alcohol.
  • the fiber base material is also made of alkali cellulose, which is preferable because it exhibits more excellent metal ion trapping ability.
  • FIG. 1 shows a breakthrough curve when the sodium-containing chelate-forming fiber obtained in Example 1 was used to treat a Ga-containing wastewater
  • FIG. FIG. 4 is a view showing a breakthrough curve when treating a Ga-containing wastewater using the acid-forming chelate-forming fiber used as a control in Example 1;
  • FIG. 3 is a graph showing breakthrough curves when treating the Cu-containing wastewater using the calcium salt-forming chelate forming fibers obtained in Example 2, and Fig. 4 is a comparative example of Example 2.
  • FIG. 4 is a view showing a breakthrough curve when a Cu-containing wastewater is treated using the acid-form chelate-forming fibers used as the raw material.
  • FIG. 5 is a graph showing the adsorption rate of Cu when treating the Cu-containing wastewater using the sodium salt-type chelating fiber of Example 3
  • FIG. 6 is a comparative example of Example 3.
  • FIG. 6 is a graph showing the Cu adsorption rate when a Cu-containing wastewater was treated using the acid-type chelate-forming fibers used as the above.
  • FIG. 7 is a graph showing a breakthrough curve of Ga when the Ga-containing wastewater is treated using the ammonium salt-type chelate-forming fiber obtained in Example 4.
  • FIG. 8 is a graph showing a breakthrough curve when treating the Cu-containing wastewater using the sodium phosphate type chelate-forming fiber obtained in Example 5, and FIG. FIG. 5 is a graph showing a breakthrough curve when a Cu-containing wastewater is treated using the phosphoric acid-type chelate-forming fiber used as a control in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • the chelating fiber used in carrying out the treatment method of the present invention is, in a fiber molecule such as animal or vegetable natural fiber, regenerated fiber, or synthetic fiber, An acid-type functional group capable of forming a chelate is introduced therein.
  • the applicant of the present application has disclosed in Japanese Patent Application Laid-Open Nos. Chelate-forming fibers such as those presented in Japanese Patent Nos. 69828 and 2000-1248467 are exemplified.
  • effective methods for producing chelate-forming fibers include cross-linking reactive compounds having both a reactive double bond and a dalicidyl group in the molecule (specifically, glycidyl acrylate, methacrylate). Glycidyl lylate, 7-glycyl glycidyl ether, etc.) Examples include a method of introducing a chelate-forming functional group into a fiber base material molecule.
  • a chelate-forming compound having a functional group reactive with a glycidyl group for example, iminoniacetic acid, ethylenediaminediacetic acid, ethylenediaminetriacetic acid, ethylenediaminetetraacetic acid,
  • a glycidyl group for example, iminoniacetic acid, ethylenediaminediacetic acid, ethylenediaminetriacetic acid, ethylenediaminetetraacetic acid
  • a diethylenetriaminepentaacetic acid group, a glutamic acid diacetate group, an ethylenediamine nicosuccinic acid group, a phosphoric acid, or the like is reacted, the reactive functional group is grafted to the graft-reactive compound. Reacts with the sidyl group to introduce a chelate-forming functional group into the fiber molecule.
  • an acid-type chelate-forming functional group is introduced into the surface of the fiber molecule, and the acid group present in the chelate-forming functional group interacts with a nearby nitrogen atom or sulfur atom. Combined with the action, it exhibits an excellent chelate capturing ability for heavy metal ions and noble metal ions.
  • the presence of the acid-type functional group depends on the type of the water to be treated and the like.
  • the pH of the water to be treated may decrease, and it may be difficult to effectively exhibit the ability to capture heavy metal ions and noble metal ions. Therefore, in the present invention, after the introduction of the acid-type chelate-forming functional group, the functional group is converted to an alcohol before using it as a metal ion-trapping material.
  • PT / JP03 / 07459 Change to a metal salt type or ammonium salt type and then contact with treated water.
  • the chelate-forming fiber is converted to a metal such as Cu, Ni, Co, Fe, Pb, Cd, or Ga, Pd, In, Rh, or the like.
  • a metal such as Cu, Ni, Co, Fe, Pb, Cd, or Ga, Pd, In, Rh, or the like.
  • the method of changing the acid-form chelate-forming functional group to an alkali metal salt type or an ammonium salt type does not require special conditions, and a normal neutralization method may be employed.
  • the fiber into which the acid-type chelate-forming functional group is introduced is immersed in a batch in, for example, an aqueous solution of 0.01 to 1 mol Z liter of alkaline metal or aqueous ammonia, or passed through a column.
  • the method of neutralization by immersion is adopted.
  • the acid-type chelate-forming functional group becomes an alkali metal salt type.
  • the base fiber itself becomes alkali cellulose, and the auxiliary chelating action as the base material is enhanced, and a more excellent metal ion capturing action is exhibited. Is preferred.
  • the type of fiber serving as a base material of the chelate-forming fiber used in the present invention is not particularly limited, and synthetic fibers such as natural fibers including plant fibers and animal fibers, regenerated fibers, polyamide fibers, and polyester fibers are used. Although all fibers can be used, comprehensive consideration should be given to the ease and amount of chelate-forming functional groups introduced into the fiber molecules and the ease of handling as a fiber material ⁇ ⁇ cost as described above. Particularly preferred are various vegetable fibers such as cotton, hemp, wood, etc .; regenerated fibers such as cuvula, rayon, and polynosic; semi-synthetic fibers such as acetate; silk and wool.
  • the first is animal fiber.
  • ⁇ fibers particularly preferred are vegetable fibers, regenerated fibers and semi-synthetic fibers mainly composed of cellulose. That is, cellulosic-based vegetable fibers have numerous methylol groups and hydroxyl groups in the molecule, and the use of the cross-linking reactive compound as described above makes it possible to use acid-type chelate-forming functional groups.
  • the base fiber itself becomes an alkaline cellulose type when the acid type functional group is converted to an alkali metal salt type or an ammonium salt type, and the This is because the ion trapping action can be further enhanced.
  • the base fiber There is no particular limitation on the shape of the base fiber, and long filament monofilament, multifilament, short fiber spun yarn, or woven or knitted fabric or knitted fabric is used. It may be a knitted fabric, or a non-woven fabric, or a fiber or a woven or knitted fabric obtained by compounding or blending two or more kinds of fibers. Also, use wood pulp or paper, or even wood chips, wood chips, thin sheets, etc. It is also possible to use.
  • the preferred shape of the short fiber powder used here is 0.0 l to 5 mm in length, preferably 0.03 to 3 mm, and the single fiber diameter is about 1 to 5 Om, preferably 5 to 3 Om. 0 m, and the aspect ratio is about 1 to 600, preferably about 1 to 100.
  • the short fiber powder chelate-forming fiber it is very easy to add the short fiber powder chelate-forming fiber to the water to be treated containing metal ions, stir, and perform a normal filtration treatment. It is possible to efficiently capture metal ions contained in the water to be treated in a short time in a simple manner. In some cases, the same metal ion trapping effect can be obtained by filling the chelate forming fibers in the form of short fiber powder into a column or the like and passing the water to be treated. . In addition, by introducing a chelate-forming functional group into the short-fiber powder material by the above-described method and then performing processing such as papermaking, a filter material having a metal chelate trapping ability can be obtained. .
  • the cross-linking-reactive compound as described above is grafted to the filter-like fiber material, and then the cross-linking-reactive compound bonded to fiber molecules is grafted.
  • a chelate-forming compound may be added to the dalicydyl group to introduce a chelate-forming functional group, which may be processed into the above-mentioned filter shape before use.
  • the above-mentioned fiber material is processed into a filter shape and incorporated into a filter device.
  • a treatment solution containing a cross-linking reactive compound is brought into contact with the incorporated fiber filter to cause a graft polymerization reaction, and further contacted with a chelate-forming compound, whereby the fiber filter is subsequently chelated. It is also possible to introduce a forming functional group.
  • the fiber material When treating the water to be treated with the fiber material into which the acid-type chelate-forming functional group has been introduced as described above, the fiber material is previously immersed in alkaline water or aqueous ammonia in batches. Alternatively, the water to be treated may be converted into an alkali metal salt or an ammonium salt by passing through a column.
  • a filter having both a chelate-capturing ability and an insoluble contaminant-capturing ability can be obtained. That is, if a fiber material whose fiber density is adjusted so as to have a mesh size corresponding to the size of insoluble contaminants contained in the water to be treated is used, when the water to be treated passes through the filter, The metal ions contained in the water to be treated are captured by the chelating functional groups, and the insoluble contaminants are prevented from passing by the mesh of the filter, and the metal ions and the insoluble inclusions are simultaneously removed. Is possible.
  • the inter-fiber gap can be adjusted arbitrarily, so if the inter-fiber gap is adjusted according to the particle size of insoluble contaminants mixed in the water to be treated, it becomes necessary It is possible to obtain a filter with the appropriate purification performance.
  • the method of reacting a chelate-forming compound via a bridge-reactive compound is an industrially extremely effective method.However, the method is not limited to these methods. Any method capable of introducing a metal-forming or ammonium salt-type chelate-forming functional group into a fiber molecule may be used, for example, in the above-mentioned Japanese Patent Application Laid-Open No. 2000-16969. Of course, it is also possible to adopt a method as disclosed in, for example, No. 828 or No. 2000-224949.
  • an aminopolycarboxylic acid group most effective as a chelate-forming functional group more specifically, an iminodiacetic acid group, a triacetate triacetic acid group, an ethylenediaminetriacetic acid group, and an ethylenediamine A tetraacetic acid group, a diethylenetriaminepentaacetic acid group, a glutamic acid diacetate group, an ethylenediamin nicosuccinic acid group; and a phosphoric acid group, but a chelating functional group other than these was introduced, or Those obtained by further changing the metal salt type or the ammonium salt type are also included in the technical scope of the present invention.
  • the method of using a cellulosic fiber as a fiber base material and introducing a chelate-forming functional group into the molecule by using a cross-linking reactive compound is not particularly limited, but preferred methods are as follows. It is.
  • the cellulosic fiber is previously added to a ferrous salt aqueous solution at room temperature.
  • the reaction is carried out at 100 ° C for about 10 minutes to 5 hours.
  • the crosslinking reactive compound efficiently grafts to the hydroxyl group in the cellulosic fiber molecule, and the daricidyl group which easily reacts with the chelate-forming compound is converted to the fiber molecule. It can be efficiently introduced inside.
  • the fiber into which the glycidyl group has been introduced by the above reaction and the chelating compound are optionally dissolved in water or a polar solvent such as N, N'-dimethylformamide or dimethylsulfoxide.
  • a polar solvent such as N, N'-dimethylformamide or dimethylsulfoxide.
  • the amount of the chelate-forming compound introduced into the fiber substrate is determined in consideration of the amount of the reactive functional group in the fiber molecule, and the amount of the cross-linking-reactive compound used for the introduction reaction, or the amount and the reaction of the chelate-forming compound. Although it can be arbitrarily adjusted depending on conditions and the like, in order to give a sufficient metal ion capturing ability to the fiber, the substitution rate calculated by the following equation is about 10% by mass or more, more preferably about 20% by mass or more. It is desirable to make adjustments as follows.
  • Substitution ratio (% by mass) [(mass of fiber after introduction of substituent group-mass of fiber before introduction of substituent group) / mass of fiber before introduction of substituent group] X 100
  • the substituent means all substituents introduced from the crosslinking reactive compound and the chelating compound.
  • the above substitution rate is preferably as high as possible. Therefore, the upper limit of the substitution rate is not particularly defined.
  • the substitution rate is desirable to keep the substitution rate at about 200% by mass or less, more preferably at about 100% by mass or less.
  • a high level of substitution rate of 150 to 200% by mass is required.
  • the chelate-forming fibers obtained as described above may be in the form of a monofilament, a multifilament, a spun yarn, a nonwoven fabric, a woven fabric, or the like, depending on the properties of the base fiber used as described above. It can be obtained in any form such as knit, powder, filter, etc., but in any case, at least one of the acid-type chelate-forming functional groups introduced on the molecular surface of the fine fiber.
  • the alkali metal salt form or the ammonium salt form By converting some, preferably substantially all, to the alkali metal salt form or the ammonium salt form, it exhibits excellent metal ion trapping performance, for example, trapping in granular or film form Compared to the material, it exhibits extremely excellent metal ion trapping ability.
  • this fiber is brought into contact with the water to be treated containing metal ions, and specifically, when the fiber is laminated at an arbitrary thickness or packed in a column and passed through the water to be treated, it is contained in the water to be treated.
  • Metal ions can be efficiently removed, or specific metal ions can be selectively captured.
  • the fiber capturing the metal ions as described above is treated with a strong acid aqueous solution such as hydrochloric acid or sulfuric acid, for example, the metal ions captured by forming a chelate are easily detached. Utilizing these properties, it is possible to concentrate and recover metal components as useful components from the regenerating solution.
  • Chelate-forming fibers (imitation of chelate-forming functional groups) in which iminoniacetic acid is immobilized via glycidyl methacrylate to about 3 decitex rayon yarn cut to a length of 0.5 mm Amount: 0.822 mimol Z g) 5.8 ml (1.16 g) is packed into a glass column 0.7 cm in inner diameter and 20 cm in length so that the packing height becomes 15 cm.
  • a flow rate of lm 1 Z the acid derived from iminoniacetic acid was passed.
  • Chelate-forming fibers (ethylene-diaminetriacetic acid immobilized via glycidyl methacrylate) on rayon yarn of about 3 dtex cut to a length of 0.5 mm. Introduced amount: 0.622 mmol Z g) 5.8 ml (1.10 g) is packed into a glass column 0.7 cm in inner diameter and 20 cm in length so as to have a layer height of 15 cm. An acid derived from ethylenediaminetriacetic acid was passed through this packed bed by passing 30 ml of a 0.5 molar Z liter aqueous hydration power aqueous solution at a flow rate of 3 m1Z. After converting substantially all of the radicals to the calcium salt form, deionized water
  • Fig. 4 shows the breakthrough curve when the Cu-containing wastewater was passed in the same manner.
  • the Cu capture amount breaks through at a bed volume of about 70, whereas the calcium salt-type In the case of using the fiber forming fibers, Cu was completely captured by chelation up to a bed volume of about 110, and it can be confirmed that the efficiency of the treatment method of the present invention is extremely high.
  • adsorption rate was examined by measuring the Cu concentration of the wastewater at the same time, and the results shown in Fig. 5 were obtained.
  • the adsorption rate (%) shown here is a value calculated by assuming the Cu concentration in the waste water after stirring for 24 hours as the adsorption rate of 100%.
  • the sodium salt type chelate forming fiber has a lower Cu adsorption rate than the acid type chelate forming fiber. It is very high, and the remarkable superiority of the treatment method of the present invention can be confirmed.
  • Chelate-forming fibers in which phosphoric acid is immobilized via glycidyl methacrylate to about 3 decitex rayon yarn cut to a length of 0.5 mm (the amount of chelate-forming functional groups introduced) : 0.605 millimoles Z g) 5.8 ml (1.18 g) is packed into a glass column with an inner diameter of 0.7 cm and a length of 20 cm so that the filling height is 15 cm.
  • the acid groups derived from phosphoric acid are substantially reduced.
  • the acid-type functional group is converted into an alkali metal salt type or an ammonium salt type and then brought into contact with the metal ion-containing water, thereby producing a chelate-forming functional group.
  • Metal ion trapping efficiency can be significantly increased.
  • the chelate-forming functional group in the form of metal salt or ammonium salt has an excellent chelate-trapping effect on heavy metal ions such as Cu, Ni, Co, Pb and Cd. It can be used effectively, for example, to trap and remove harmful heavy metal ions from plating wastewater, and is also excellent for precious metals, such as Ga, Pd, In, and Rh. Since it has a trapping function, it can be widely and effectively used for the concentration and recovery of precious metals from wastewater from tanks for collecting precious metals and wastewater from semiconductor manufacturing facilities.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Water By Ion Exchange (AREA)

Abstract

L'invention concerne des fibres de chélation contenant des groupes fonctionnels formant un chélate dans la molécule, présentant une meilleure absorption des ions métalliques, et un procédé de traitement des eaux. L'invention concerne des fibres de chélation présentant une meilleure absorption des ions métalliques, permettant de transformer les groupes fonctionnels formant un chélate de type acide en groupes de sel de métal alcalin ou de sel d'ammonium. L'invention concerne également un procédé destiné au traitement d'une eau contenant des ions métalliques, utilisant une fibre de chélation contenant des groupes fonctionnels formant un chélate dans la molécule. Dans ce procédé, les groupes fonctionnels de type acide sont transformés en groupes de sel de métal alcalin ou de sel d'ammonium avant leur contact avec l'eau contenant des ions métalliques, pour obtenir ainsi une meilleure absorption des ions métalliques.
PCT/JP2003/007459 2002-06-13 2003-06-12 Fibres de chelation et traitement a l'aide de ces fibres d'une eau contenant des ions metalliques WO2003106757A1 (fr)

Applications Claiming Priority (4)

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JP2002-173151 2002-06-13
JP2002173151 2002-06-13
JP2002238540 2002-08-19
JP2002-238540 2002-08-19

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02187143A (ja) * 1989-01-13 1990-07-23 Japan Atom Energy Res Inst イミノジ酢酸基を有するキレート樹脂吸着剤の製造方法
CA2073578A1 (fr) * 1991-07-12 1993-01-13 Joseph R. Garlich Chelatants degradables contenant des groupes carbonyles, leurs utilisations et compositions de ceux-ci
WO1998016680A1 (fr) * 1996-10-15 1998-04-23 Chelest Corporation Fibre de formation de chelate metallique, procede de preparation de cette fibre, et procede de sequestration d'ions metalliques au moyen de cette derniere
WO2000052252A1 (fr) * 1999-02-26 2000-09-08 Chelest Corporation Fibre capable de former un chelate, son procede de production, procede de piegeage d'ions metal dans la fibre et fibre chelatee
JP2002173665A (ja) * 2000-12-05 2002-06-21 Mitsubishi Rayon Co Ltd キレート剤及びその処理方法、キレート樹脂及び繊維、錯体の形成方法並びにホウ素、重金属の回収方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02187143A (ja) * 1989-01-13 1990-07-23 Japan Atom Energy Res Inst イミノジ酢酸基を有するキレート樹脂吸着剤の製造方法
CA2073578A1 (fr) * 1991-07-12 1993-01-13 Joseph R. Garlich Chelatants degradables contenant des groupes carbonyles, leurs utilisations et compositions de ceux-ci
WO1998016680A1 (fr) * 1996-10-15 1998-04-23 Chelest Corporation Fibre de formation de chelate metallique, procede de preparation de cette fibre, et procede de sequestration d'ions metalliques au moyen de cette derniere
WO2000052252A1 (fr) * 1999-02-26 2000-09-08 Chelest Corporation Fibre capable de former un chelate, son procede de production, procede de piegeage d'ions metal dans la fibre et fibre chelatee
JP2002173665A (ja) * 2000-12-05 2002-06-21 Mitsubishi Rayon Co Ltd キレート剤及びその処理方法、キレート樹脂及び繊維、錯体の形成方法並びにホウ素、重金属の回収方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WALY A. ET AL.: "Synthesis and characterization of cellulose ion enchanger; Pilot scale and utilization in dye-heavy metal removal", J. APPL. POLYM. SCI., vol. 68, no. 13, 27 May 1998 (1998-05-27), pages 2151 - 2157, XP000854236 *

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