METHOD OF MANUFACTURE OF THE FILTERING MATERIAL AND THE FILTERING MATERIAL Russian patent published in 2007 - IPC B01D39/16 

FIELD: chemical industry; methods of manufacture of the filtering material.

SUBSTANCE: the invention is pertaining to the water conditioning and may be used for production of the cationic-exchanging filters of the spatially- globular structures providing the complex water purification. The method of manufacture of the filtering material provides for condensation of formaldehyde with sulforesorcin and hardening. At that the mixture of the excess of formaldehyde with sodium sulfite or potassium sulfite is aged in the conditions ensuring the synthesis of the sulfonating agent at lack of polymerization of the formaldehyde. Then the produced solution is added with resorcin and kept in the conditions ensuring the simultaneous running of the synthesis of sulforesorcin and precondensation of it and resorcin with the formaldehyde and the polycondensation of the produced preoligomers, and the subsequent hardening is conducted in the acidic medium. The filtering material includes the product of condensation of the formaldehyde with resorcin in the acidic medium and has the spatially- globular structure. At that the material contains the product of condensation of the formaldehyde with sulforesorcin and resorcin, and additionally - the functional groups - SO₃H, characterized in the IR spectrum of absorption for the material sample by the strips with the minimums of 1040 cm^-1 (the characteristic strip) and 1190 cm^-1 (the weakly expressed strip). The invention ensures production of the material effective for removal of the heavy metals from the water.

EFFECT: the invention ensures production of the material effective for removal of the heavy metals from the water.

5 cl, 3 ex, 1 tbl, 1 dwg