FIELD: used as catalyst. SUBSTANCE: tetraethylsilicate, tetraethyltitanate organic nitrogen-containing base, gallium nitrate, salts or/and hydroxides of alkaline or/and alkaline-earth metals are mixed together in the following mixture ratio based on total oxides: SiO2/Ga2O3 130-600; SiO2/TiO2 20-50; H2O/SiO2 20-100; M/SiO2 0.01-0.1 C12H21N+/SiO2 0.2-0.4, wherein M is an alkaline or alkaline-earth metal cation. Hydrothermal crystallization is carried out at 120-200 C for 1-120 hrs. EFFECT: increased efficiency. 6 ex, 1 tbl
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