Obtaining and research of aluminosilicate sorbent

Abstract

A technological scheme for the synthesis of an aluminosilicate sorbent in laboratory conditions using clay from the Semilukskoye deposit has been developed. When the sorbent sample is heated in the range of 30-225 ° C, a loss of free moisture occurs, in the temperature range of 405-550 ° C, bound water begins to evaporate and decomposition of organic substances occurs. The sorption of sodium sulfide by the sorbent surface has been studied. The constants ? and n are determined in the Freundlich equation A = 1.38 ? C1.19. Formed specific surface area S = 12.8 m2 / g. A comparative study of the acid-base properties of the surface of the synthesized aluminosilicate sorbent and diatomite Celite 545 60/80 MESH by the indicator method has been carried out. The adsorption on the acid-base centers of the synthesized aluminosilicate sorbent surface is higher than the adsorption on the diatomite surface. On the surface of the synthesized aluminosilicate sorbent, there are both acidic (pK = 1.7; 3.46) and basic (pK = 18.8; 9.2) Bronsted centers The pore volume of the synthesized aluminosilicate sorbent corresponds to 0.25 cm3 / g. This value is less than the pore volume of diatomite 1.86 cm3 / g.