METHOD OF PRODUCING TITANIUM-ALUMO-SILICATE ZEOLITE OF ZSM-12 TYPE Russian patent published in 2021 - IPC B01J29/04 C01B39/04 C01B39/42 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of producing titanium-alumino-silicate zeolite of type (Ti/Al)-ZSM-12, characterized in that an aqueous solution is mixed with pH = 8.5–9.5, containing an aluminum compound, a titanium compound and templates, which is brought with dry alkali or aqueous solution of alkali to pH = 11.5–13.5, and an aqueous solution containing a compound of silicon, to obtain a gelatinous mass, wherein mixture of solutions is prepared based on observance of following molar ratios of used components, in terms of oxides Al₂O₃, TiO₂, SiO₂ : template /SiO₂ = 0.06–0.15; SiO₂/Al₂O₃ = 100–600; SiO₂/TiO₂ = 100–600; H₂O/SiO₂ = 4–16; TiO₂ : Al₂O₃ = 1:1; as well as K₂O or Na₂O/SiO₂ = 0.05–0.15 in terms of corresponding hydroxides, until homogeneous gel-like mass is obtained, which is left for 60–90 minutes at room temperature to form a primary gel structure; method comprises crystallizing the obtained gel-like mass for 5-6 days at 145–155 °C with subsequent extraction of crystalline product, with its subsequent washing with distilled water to achieve pH of filtrate 9.0–9.5, drying to constant weight and annealing at 550±10 °C for 8–12 hours; ion exchange reaction is carried out with aqueous ammonium salt solution, followed by separation of the product, washing it with distilled water until pH of the filtrate is equal to 7.8–8.3, drying to constant weight and calcining at 500±10 °C for 4–7 hours.

EFFECT: technical result consists in development of easy-to-implement, time-consuming method for synthesis of zeolite material of type (Ti/Al)-ZSM-12 with content of carcass titanium atoms of not more than 20 % and acidity from 700 to 1,000 mcmol/g.

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