CATALYTIC HIGHLY SELECTIVE METHOD FOR PRODUCING OLEFINS WITH A LOW NUMBER OF CARBON ATOMS APPLYING A HETEROATOM-ALLOYED MOLECULAR SIEVE AND SYNTHESIS GAS Russian patent published in 2022 - IPC B01J29/84 B01J29/85 B01J23/06 B01J23/34 B01J23/26 B01J23/08 B01J23/74 B01J23/10 B01J23/18 B01J21/06 C07C1/04 C07C11/02 

FIELD: catalysts.

SUBSTANCE: invention relates to a catalyst for producing C_2-4 olefins from synthesis gas and to a method for producing C_2-4 olefins applying synthesis gas as a raw material for the reaction in conditions of a fixed layer or a mobile layer in the presence of said catalyst. The catalyst contains component I and component II; the active component of said component I constitutes a metal oxide, and component II constitutes a heteroatom-alloyed molecular sieve. Said metal oxide constitutes one, two, or more of MnO_x, Mn_aCr_(1-a)O_x, Mn_aAl_(1-a)O_x, Mn_aZr_(1-a)O_x, Mn_aIn_(1-a)O_x, ZnO_x, Zn_aCr_(1-a)O_x, Zn_aAl_(1-a)O_x, Zn_aGa_(1-a)O_x, Zn_aIn_(1-a)O_x, CeO_x, Co_aAl_(1-a)O_x, Fe_aAl_(1-a)O_x, GaO_x, BiO_x, InO_x, In_aAl_bMn_(1-a-b)O_x, In_aGa_bMn_{(1-a-b) x}; the range of values of x herein is 0.7 to 3.7, the range of values of a is 0 to 1; the range of values of a+b is 0 to 1. The specific surface area of MnO_x, ZnO_x, CeO_x, GaO_x, BiO_x, InO_x is 1 to 100 m²/g. The specific surface area of Mn_aCr_(1-a)O_x, Mn_aAl_(1-a)O_х, Mn_aZr_(1-a)O_x, Mn_aIn_(1-а)O_х, ZnO_x, Zn_aCr_(1-a)O_x, Zn_aAl_(1-a)O_x, Zn_aGa_(1-a)O_x, Zn_aIn_(1-a)O_x, Co_aAl_(1-a)O_x, Fe_aAl_(1-a)O_x, In_aAl_bMn_(1-a-b)O_x, In_aGa_bMn_(1-a-b)O_x is 5 to 150 m²/g. The molecular sieve constitutes a molecular sieve with a CHA or AEI topological structure, wherein the framework atoms provide for Al-P-O or Si-Al-P-O; and the heteroatoms constitute one, two, or more of divalent metals Mg, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sr, Zr, Mo, Cd, Ba, Ce, trivalent Ti, Ga, and tetravalent Ge; said heteroatoms in said heteroatom-alloyed molecular sieve are added to said molecular sieve framework and replace Al, P, or Si in the molecular sieve framework.

EFFECT: effective increase in the activity and selectivity with respect to the product in the course of the reaction of direct conversion of synthesis gas with the production of olefins.

10 cl, 8 tbl, 12 ex