METHOD OF PRODUCING COMPOSITE CATALYTIC MATERIAL IN FORM OF LAYERED HOLLOW SPHERES Russian patent published in 2017 - IPC B01J37/25 B01J31/08 B01J35/08 B01J23/24 B01J23/74 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering, in particular, to production of new forms of grains of catalytic materials in the form of layered hollow spheres or other hollow structures for hydrocarbon conversion processes, including partial oxidation of aliphatic hydrocarbons. Method of producing composite catalytic material in form of layered hollow spheres includes application onto an organic polymer support of a film-forming solution and subsequent thermal treatment. Organic polymer support used is ion-exchange resins, which enable to create controlled composition layered catalyst systems: component ABC/component D/sphere cavity, where component ABC is represented by general formula of external layer of a sphere Ti_(1-b)Si_bO_q, b denotes number of moles of silicon from 0 to 1, (1-b) denotes number of moles of titanium, which depends on amount of silicon added to system, q denotes stoichiometric amount of oxygen, included in outer layer of sphere, valency and content of elements, other than oxygen are determined, component D is an inner layer of sphere of general formula M'_xO_y, where M' denotes a dopant component in volume of polymer organic support, x denotes concentration of metal or nonmetal added in amount of 1 g of ionite, from 0 mol/l to maximum allowable, y denotes a number defined by valency and content of elements, other than oxygen. Before immersing in film-forming solution organic polymer support undergoes pretreatment, which includes adding thereto dopant ions with subsequent drying, after which organic polymer support is immersed in film-forming solution for 5–60 minutes, extracted from film-forming solution, undergoes stepped heat treatment at temperature intervals 40–100 °C, 100–200 °C, 200–350°C with duration of 30–40 minutes each, and at temperature in range of 400–700 °C for up to 60 minutes.

EFFECT: invention enables to produce spherical materials, having inner cavity and having sufficient catalytic activity during oxidation of alkanes, including naphthenes.

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