Obtaining intercalar sorbents and their application

The study of the process of intercalation of natural soils from Karnabota kaolin, Kattakurgan and Navbahor bentonite deposits, physicochemical, structural and textural characteristics of the formed substances and the possibilities of application of the obtained products are studied. The solution containing Al₁₃ polycation was prepared by hydrolysis of aluminium chloride. AlCl₃6H₂O was added dropwise to the solution at pH 4.3–4.7 at room temperature until NaOH [OH]/[Al³+] =2,4. The solution was then precipitated at 60 °C for 24 h, resulting in the formation of Al13 polyhydroxycomplex. By the hydrothermal processing method according to the recipe of the solution containing Al₃₀ polycation, Al₁₃ was obtained from the solution, which was stored at 115 °C for 5 hours. The molar ratio of Al₂(OH)₅Cl and FeCl₃6H₂O solution mixture in a high-pressure reactor (at 135 °C for 20 hours) by hydrothermal processing of large-scale Al/Fe polyhydroxycomplex solutions is Al: Fe = 15. With respect to Al³+, the concentration of the solution (x) is x = 2.5, 3.7, 4.3, 5.1M (in the case of x> 6M a precipitate is formed). 20 g of bentonite was immersed in 1 litre of distilled water and after 24 h the top layer of the suspension was centrifuged. The separated MM (montmorillonite) fraction particles were dried at 60 °C with an average size of 2 μm. MM Al₁₃, Al₃₀, and Al/Fe polyhydroxycomplex intercalation were performed by adding an intercalating solution by ion exchange in a 1% aqueous suspension (3mol Al³ +/g MM) and using a powerful magnesium agitator at 80 °C for 2 h. After 12 h, the suspension was washed with Cl-ions at room temperature.