FIELD: chemical industry.
SUBSTANCE: invention relates to aluminum-alloyed chelating resins containing groups of iminodiacetic acid. Method for producing an aluminum-alloyed chelating resin containing iminodiacetic acid groups is described, containing functional groups of the formula 
(I), and 
is a polymer skeleton, and X is any monovalent anion; according to the invention, a) monomer droplets of at least one monovinylacetate compound and at least one polyvinyl aromatic compound, as well as from at least one porogen and at least one initiator are reacted to obtain a cross-linked granulated polymerization product, b) said crosslinked granulated polymerization product from step a) is subjected to phthalimidomethylation using phthalimide derivatives, and in this reaction the phthalimide derivative is used in a ratio of 0.7 mol to 1.7 mol per mol of the granulated polymerization product, c) the specified phthalimidomethylated granulated polymerization product with a degree of primary substitution of phthalimidomethyl groups from 0.6 to 1.5 from step b) is converted into an aminomethyl granulated polymerization product and d) said aminomethyl granulated polymerization product from step c) is reacted with chloroacetic acid or its salts to form chelating resins, having iminodiacetic acid groups, with a degree of functionalization of amino groups with acetic acid groups from 1.4 to 1.65, and the molar ratio for chloroacetic acid or its salts is from 1.8:1 to 2.5:1, in terms of the amount of aminomethylated granulated polymerization product used, and e) said chelating resin containing iminodiacetic acid groups, from step d), is brought into contact with a solution of aluminum salt of trivalent aluminum ion. Aluminum-alloyed chelating resin containing iminodiacetic acid groups obtained by the above method is described. Device for removing fluoride from water is also described, containing at least one layer a) at least one of the above aluminum-doped containing groups of iminodiacetic acid chelating resin.
EFFECT: technical result is to obtain a chelating resin that effectively removes fluoride from the water.
7 cl, 2 ex, 3 tbl
