CATALYTIC SYSTEM, BASED ON NITRIDED MIXED OXIDE AND METHOD FOR OBTAINING ETHYLENE-UNSATURATED CARBOXYLIC ACIDS OR ESTERS Russian patent published in 2016 - IPC C07C51/353 C07C57/04 C07C67/343 C07C69/54 B01J21/02 B01J21/06 B01J23/02 B01J23/08 B01J23/12 B01J23/14 B01J23/18 B01J23/20 B01J27/24 B01J37/03 

FIELD: chemistry.

SUBSTANCE: invention relates to method for obtaining α, β ethylene-unsaturated carboxylic acids or esters, which contains stages, where induced is contact of formaldehyde or its suitable source with carboxylic acid or ester of formula R³-CH₂-COOR⁴, where R⁴ stands for hydrogen or alkyl group, and R³ stands for hydrogen, alkyl or aryl group, in presence of catalyst and possibly in presence of alcohol, where said catalyst contains nitrided metal oxide, which has, at least, two types of cations of metals M¹ and M², where M¹ is selected from metals or metalloids of groups 3, 4, 13 (also called IIIA) or 14 (also called IVA) of Periodic table, with M² being selected from metals metalloids or phosphorus of group 5 or 15 (also called VA) of Periodic table. The invention also relates to catalytic system for reaction of formaldehyde or its suitable source with carboxylic acid or ester of formula R³-CH₂-COOR⁴, where R⁴ stands for hydrogen or alkyl group, and R³ stands for hydrogen, alkyl or aryl group, optionally in presence of alcohol, with obtaining α, β ethylene-unsaturated carboxylic acids or esters, where said catalyst contains nitride metal oxide, which has, at least, two types of cations of metals M¹ and M², where M¹ is selected from, at least, two metals or metalloids of group 2, 3, 4, 13 (also called IIIA), 14 (also called IVA) of Periodic table, with M² being selected from, at least, one metal of group 5 or, at least, one metal or metalloid of group 15 (also called VA) in 4^th-6^th of Periodic table.

EFFECT: obtaining target products with high selectivity is achieved.

16 cl, 6 tbl, 22 ex