MIXED OXIDE CATALYSTS OF OXIDATIVE METHANE CONDENSATION Russian patent published in 2021 - IPC B01J23/02 B01J23/10 B01J35/02 C07C2/84 C07C11/04 

FIELD: catalysts.

SUBSTANCE: invention relates to a composition of a nanoplated catalyst for oxidative methane condensation (OCM) containing the amount of nanoplates equal to or greater than approximately 25 wt.% relative to the total weight of the composition of the nanoplated OCM catalyst; wherein the nanoplate constitutes a three-dimensional object determined in accordance with the ISO/TS 80004-2:2015 standard; wherein the nanoplate is characterised by a first external dimension, a second external dimension, and a third external dimension; wherein the first external dimension is the thickness (t) of the nanoplate, and wherein t is equal to approximately 100 nm or less; wherein the second external dimension is the length (l) of the nanoplate, and wherein l is greater than t; aherein the third external dimension is the width (w) of the nanoplate, and wherein w is greater than t; wherein l and w may be the same or different; and wherein (i) l ≥ 5t, (ii) w ≥ 5t or (iii) l ≥ 5t and w ≥ 5t; and wherein the composition of the nanoplated OCM catalyst is described by the general formula A_aZ_bE_cD_dO_x, wherein A is an alkaline earth metal, Z constitutes a first rare-earth element, E constitutes a second rare earth element, D constitutes a third rare earth element; wherein the first rare earth element, the second rare earth, and the third rare earth element, if present, are not the same; wherein the first rare earth element is selected from the group consisting of lanthanum (La), neodymium (Nd), and combinations thereof; wherein the second rare earth element and the third rare earth element may be independently selected from the group consisting of scandium (Sc), cerium (Ce), praseodymium (Pr), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), yttrium (Y), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and combinations thereof; wherein a equals 1.0; the value of b is from approximately 1.0 to approximately 3.0; C is from 0 to approximately 0.3; d is from 0 to approximately 0.3; wherein x balances the degrees of oxidation. The invention also relates to a method for producing a composition of a nanoplated catalyst for oxidative methane condensation (OMC) and to a method for producing olefins.

EFFECT: development of catalytic compositions for OMC processes with an increase in the conversion and selectivity.

20 cl, 10 dwg, 2 tbl, 6 ex