Synthesis and investigation of physicochemical characteristics of granulated LSX in various forms.

Using the methods of XRF, XRD, and low-temperature adsorption-desorption of nitrogen, the physicochemical characteristics of granular LSX zeolites like in many cation-exchange forms were studied. A comparative analysis of their adsorption properties in static and dynamic modes with an industrial imported analogue was carried out. It is shown that the adsorption characteristics for nitrogen, CO2, water vapor and benzene of the synthesized granular LSX zeolite in the Li-form and the imported analogue are close. In this work proposed a method for synthesis of granular zeolite LSX in lithium form, involving synthesis of highly dispersed zeolite NaK-LSX; its blending and granulation with clay mineral from Troshkovsky region; drying in air atmosphere at T= 120-140 °C for 4-6 hours and calcining at 600-650 °C for 4-6 hours; treatment in a sodium hydroxide solution with a concentration of C(NaOH) = 70 g/l at 70 °C for 3 hours, followed by a three-fold ion exchange in a Lithium chloride solution. [ABSTRACT FROM AUTHOR]