METHOD OF PREPARATION OF CRYSTAL ELEMENTO-ALUMO-PHOSPHATES Russian patent published in 2005 - IPC

FIELD: preparation of crystal elemento-alumo-phosphates, including alumo-phosphates of zeolite-like structure.

SUBSTANCE: alumo-phosphates are designated as ATO according to classification of Structural Commission of International Zeolite Association. Proposed method includes preparation of aqueous reaction mixture containing aluminum source, concentrated phosphoric acid and one or two sources of substituting element, as well as organic structure-forming compound in form of di-n-pentyl amine or mixture of di-n-pentyl amine with other di-n-pentyl amines having common composition expressed in terms of mole ratios: R/Al₂O₃=0.5-2.0; P₂O₅/Al₂O₃=0.8-1.2; MO_x/Al₂O₃=0.1.5; H₂O/Al₂O₃=15-200, where R is organic structure-forming compound; M is substituting element selected from beryllium, magnesium, zinc, chromium, gallium, iron, silicon, titanium, cobalt, manganese and cadmium; x=1, 3/2 or 2. Then, mixture thus prepared is subjected to crystallization, after which material is separated and dried.

EFFECT: possibility of obtaining pure-phase specimens without by-phases.

39 cl, 1 dwg, 7 tbl