Patent ID: 8940924
Filing Date: 2015-01-27
Classification: B01J,C07C

Abstract:
1. A catalyst for the reaction of a suitable source of formaldehyde with a carboxylic acid or ester to produce an ethylenically unsaturated carboxylic acid or ester, wherein the catalyst comprises a metal oxide having at least two metal cations, M 1 and M 2 , wherein M 1 is at least one metal selected from group 3 or 4 in the 4 th to 6 th periods of the periodic table, group 13 in the 4 th to 5 th periods of the periodic table, or the remaining elements in the lanthanide series including scandium, yttrium, the lanthanide elements, titanium, zirconium, hafnium, gallium, and indium and M 2 is at least one metal selected from group 5 in the 5 th or 6 th periods of the periodic table or group 15 in the 4 th or 5 th periods of the periodic table including niobium, tantalum, arsenic, and antimony and optionally, M 3 or M 4 , wherein M 3 is selected from groups 1 and 2 of the periodic table and M 4 is selected from group 14 of the periodic table, wherein the ratio M 1 :M 2 is in the range of from 5:1 to 1:5, and wherein the metal oxide catalyst compound of the invention does not include other metal types above a level 0.1 mol % other than the types M 1 , M 2 , M 3 , or M 4 .