METHOD OF PRODUCTION OF COMPOSITE MATERIALS BASED ON SILICON DIOXIDE Russian patent published in 2014 - IPC C01B33/14 C01B33/159 C01B13/14 B01J21/06 B82B3/00 B82Y30/00 

FIELD: chemistry.

SUBSTANCE: invention relates to the chemical industry and can be used to produce composites which are used in photocatalytic processes as catalysts of oligomerisation of olefins and polymerisation of ethylene. The composite material based on silica gel is obtained by precipitation of silicon dioxide from sodium silicate in the presence of titanium dioxide or copper oxide by bubbling of carbon dioxide through the thickness of the suspension at the atmospheric pressure to form the composite material with the type "core (silicon dioxide)/shell (metal oxide)". The method can be used both in the laboratory and in industrial conditions.

EFFECT: invention enables to simplify the process of obtaining a composite, as the need for complex instrumental execution of the process is eliminated, connected with the use of high pressure of carbon dioxide in obtaining the silica gel, as well as environmental safety of the technology, which is connected to the lack of carbon dioxide emissions, achieved by its repeated use.

3 dwg, 2 ex