CATALYST AND METHOD FOR DIRECT CONVERSION OF SYNTHESIS GAS FOR PRODUCTION OF LOW-CARBON OLEFINS Russian patent published in 2021 - IPC B01J29/70 B01J29/85 B01J29/83 B01J21/04 B01J21/06 B01J23/06 B01J23/34 B01J23/08 B01J23/16 B01J23/26 B01J23/745 B01J23/75 B01J37/04 B01J35/10 C07C1/04 C07C11/02 

FIELD: chemistry.

SUBSTANCE: present invention relates to direct production of C₂-C₄-olefins applying synthesis gas, and in particular, relates to a catalyst and a method for direct conversion of synthesis gas for production of C₂-C₄-olefins in conditions of a fixed bed or a movable bed. Said catalyst constitutes a mixed catalyst produced by combining component I and component II with each other by means of mechanical mixing, wherein the active component of component I constitutes a metal oxide, and component II constitutes one, two or more from a molecular sieve with a CHA or AEI structure. Said metal oxide constitutes one, two or more from Ga₂O₃, Bi₂O₃, In₂O₃, MnCr₂O₄, MnAl₂O₄, MnZr₂O₄, MnIn₂O₄, ZnCr₂O₄, ZnAl₂O₄, ZnGa₂O₄, ZnIn₂O₄, CoAl₂O₄, FeAl₂O₄, InAl₃MnO₇ and InGa₂MnO₇. The specific surface area of said Ga₂O₃, Bi₂O₃ and In₂O₃ is 1 to 100 m²/g; the specific surface area of said MnCr₂O₄, MnAl₂O₄, MnZr₂O₄, MnIn₂O₄, ZnCr₂O₄, ZnAl₂O₄, ZnGa₂O₄, ZnIn₂O₄, CoAl₂O₄, FeAl₂O₄, InAl₃MnO₇ and InGa₂MnO₇ is 5 to 150 m²/g. Said molecular sieve comprises average-strength acid sites, wherein the amount of average-strength acid sites is up to 0.3 mol/kg.

EFFECT: reaction process is characterised by high yield and selectivity for the product, wherein the total selectivity for propylene and butylene reaches 40 to 75%; the total selectivity for low-carbon olefins, including ethylene, propylene and butylene, can reach 50 to 90%; wherein the selectivity for methane as a byproduct is less than 15%, indicating the appropriate possibilities for application.

12 cl, 7 tbl, 12 ex