CATALYST FOR OXIDATIVE CONDENSATION OF METHANE AND METHOD OF ITS RECEPTION Russian patent published in 2018 - IPC B01J23/28 B01J23/32 B01J23/04 B01J21/08 B01J37/08 B01J37/02 

FIELD: technological processes.

SUBSTANCE: invention relates to a process for processing methane-containing gases, for example, natural gas, mine methane, and the like to obtain C₂₊ hydrocarbons by oxidative condensation of methane (OCM) at atmospheric pressure and elevated temperature in the presence of a catalyst. Catalyst is claimed for the oxidative condensation of methane to C₂₊ hydrocarbons, containing oxides of sodium, manganese and refractory metal, deposited on silica gel, while as a silica gel it contains water resistant, stabilized with 5 % by weight of calcium metasilicate, biporous silica gel, and as a refractory metal – molybdenum, with the following ratio of ingredients (wt %): manganese oxide (MnO₂) 10–17, molybdenum oxide (MoO₃) 12–16, sodium oxide (Na₂O) 5.2–6.9 and water-resistant, stabilized with 5 % CaSiO₃, biporous silica gel – the rest. Invention also relates to a process for preparing the claimed catalyst by impregnating silica gel with aqueous solutions of salts, followed by drying at 110 °C for 4 hours and calcination of 900 °C is 4 hours, while water-resistant, stabilized with 5 % by weight of calcium metasilicate, biporous silica gel is sequentially impregnated with solutions of salts of manganese and sodium molybdate. Technical result consists in the preparation of a catalyst for the oxidative condensation of methane to C₂₊-hydrocarbons with improved selectivity index Sel_C2 and the relation K_C2H4/C2H6 at a high conversion of methane X_CH4, which together provides an increased yield of ethylene.

EFFECT: increased yield of ethylene.

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