Patent ID: 9399210
Filing Date: 2016-07-26
CPC Classification: B01J,C01B,C07C

Claim Text:
1. A method of producing an ethylenically unsaturated carboxylic acid or ester comprising the steps of contacting formaldehyde or a suitable source thereof with a carboxylic acid or ester of formula R 3 —CH 2 —COOR 4 wherein R 4 is either hydrogen or an alkyl group and R 3 is either hydrogen, an alkyl or aryl group, in the presence of a catalyst, wherein the catalyst comprises a nitrided metal oxide having at least two types of metal cations, M 1 and M 2 , wherein M 1 is selected from the metals of group 3, 4, 13 (called also IIIA) or 14 (called also IVA) of the periodic table and M 2 is selected from the metals of groups 5 or 15 (called also VA) of the periodic table, wherein: the nitrided metal oxide is selected from the list group consisting of: AlPON; ZrPON; SnPON; ZrNbON; GaSbON; and GaAlPON, and wherein the nitrided metal oxide is supported on a support or is unsupported.