Novel aluminum-doped, iminodiacetic acid group-containing chelate resins

Patent metadata

Field	Value
Publication number	US-2016347632-A1
Application number	US-201515116553-A
Country	US
Kind code	A1
Filing date	Feb 4, 2015
Priority date	Feb 7, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

The present invention relates to aluminum-doped chelate resins containing iminodiacetic acid groups, to a production process for aluminum-doped chelate resins containing iminodiacetic acid groups, and to a device comprising at least one layer of at least one aluminum-doped chelate resin containing iminodiacetic acid groups, and to the uses of this device and of the chelate resins for removal of fluoride from water.

First claim

1 - 10 . (canceled)

11 . An aluminum doped chelate resin for absorption of cations, the resin comprising a polymer containing iminodiacetic acid groups represented by the structural formula (I)

where represents a polymer skeleton, X is any monovalent anion, b is 1 or 2, and a is 0 when b is 2, or a is 1 when b is 1.

12 . The resin according to claim 11 , wherein the functionalization level of the amino groups with acetic add groups is 14 to 1.65.

13 . The resin according to claim 12 , wherein a first substitution level of aromatic groups of the polymer with the iminodiacetic groups represented in formula (I) is 0.6 to 1.5.

14 . The resin according to claim 13 , wherein the first substitution level is 0.0 to 1.2 and the functionalization level is 1.4 to 1.65.

15 . The resin according to claim 13 , wherein the first substitution level is 0.7 to 0.9 and the functionalization level is 1.4 to 1.65.

16 . The resin according to claim 11 , wherein
the polymer comprises repeat units derived from at least one monovinylaromatic compound and at least one polyvinylaromatic compound; and X is nitrate, nitrite, hydrogensulfate, hydrogencarbonate or a halide.

17 . The resin according to claim 11 , wherein:
the monovinylaromatic compounds include styrene, vinyltoluene, ethylstyrene, a methylstyrene, chlorostyrene, chloromethylstyrene, alkyl acrylates or alkyl methacrylates; the polyvinylaromatic compounds include divinylbenzene, divinyltoluene, trivinylbenzene, divinylnaphthalene, trivinylnaphthalene, 1,7-octadiene, 1,5-hexadiene, ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate or allyl methacrylate; and X is halide.

18 . The resin according to claim 15 , wherein
the monovinylaromatic compound is styrene; the polyvinylaromatic compound divinylbenzene; and X is chlorine.

19 . A process for producing the chelate resin as claimed in claim 1 , the process comprising:
converting monomer droplets composed of at least one monovinylaromatic compound, at least one polyvinylaromatic compound, at least one porogen, and at least one initiator to a crosslinked bead polymer; phthalimidomethylating the crosslinked bead polymer with phthalimide derivatives to produce phthalimidomethylated bead polymer; converting the phthalimidomethylated bead polymer to aminomethylated bead polymer to produce aminomethylated bead polymer; reacting the aminomethylated bead polymer with chloroacetic acid or salts thereof to produce chelate resins having iminodiacetic acid groups; and contacting the chelate resin containing iminodiacetic acid groups with an aluminum salt solution of a trivalent aluminum ion to produce the chelate resin.

20 . The process according to claim 19 , wherein:
the phthalimidomethylation reaction comprises a molar ratio of phthalimide derivative to bead polymer of 0.7 mol to 1.7 mol; and the reaction with chloroacetic acid comprises a molar ratio of chloroacetic acid or salts thereof to aminomethylated bead polymer of 1:8:1 to 2.5:1 for functionalization of amino groups at a functionalization level of 1.4 to 1.65.

21 . The process according to claim 20 , wherein the phthalimidomethylation is conducted at a temperature of 50° C. to 80° C.

22 . The process according to claim 21 , wherein the phthalimidomethylation comprises a condensation of the phthalimide derivative with the bead polymer using a catalyst in a molar ratio of 0.1:1 to 0.45:1 in relation to the amount of bead polymer used.

23 . The process as claimed in claim 22 , wherein the contacting of the chelate resin containing iminodiacetic add groups with an aluminum salt solution comprises contacting the resin with 2 to 6 mol of aluminum based on one liter of chelate resin containing iminodiacetic add groups.

24 . The process according to claim 19 , wherein:
the phthalimidomethylation reaction comprises a molar ratio of phthalimide derivative to bead polymer of 0.7 mol to 1.35 mol; and the reaction with chloroacetic acid comprises a molar ratio of chloroacetic acid or salts thereof to aminomethylated bead polymer of 1.8:1 to 2.5:1 for functionalization of amino groups at a functionalization level of 1.4 to 1.65.

25 . A device for removing fluoride from water, the device comprising at least one layer of at least one aluminum-doped chelate resin containing iminodiacetic acid groups as claimed in claim 1 .

26 . A method for removing fluoride from water, the method comprising contacting water containing fluoride with the aluminum-doped chelate resin of claim 1 to absorb fluoride ions from the water.

Assignees

• Lanxess Deutschland Gmbh

Inventors

• Neumann Stefan
• Klipper Reinhold
• Makropoulos Pavlos
• Barbier Jenny
• Schroeder Maresa

Classifications

• C02F2103/346

  from semiconductor processing, e.g. waste water from polishing of wafers · CPC title

• C02F2103/12

  from the silicate or ceramic industries, e.g. waste waters from cement or glass factories · CPC title

• C02F2101/14

  Fluorine or fluorine-containing compounds · CPC title

• C08F8/42

  Introducing metal atoms or metal-containing groups · CPC title

• 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 (ion-exchange chromatography processes B01D15/36) · CPC title