	US 12,311,340 B2
	Catalyst and a process for the production of ethylenically unsaturated carboxylic acids or esters
Adam Cullen, Redcar (GB)
Assigned to Mitsubishi Chemical UK Limited, Billingham (GB)
Filed by MITSUBISHI CHEMICAL UK LIMITED, Billingham (GB)
Filed on Mar. 9, 2022, as Appl. No. 17/690,518.
Application 17/690,518 is a continuation of application No. 17/438,594, granted, now 12,059,669, previously published as PCT/GB2020/050648, filed on Mar. 13, 2020.
Claims priority of application No. 1903452 (GB), filed on Mar. 13, 2019.
Prior Publication US 2022/0193636 A1, Jun. 23, 2022
Int. Cl. B01J 21/06 (2006.01); B01J 6/00 (2006.01); B01J 21/08 (2006.01)

CPC B01J 21/063 (2013.01) [B01J 6/001 (2013.01); B01J 21/08 (2013.01)]

6 Claims

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 in the presence of catalyst and wherein the catalyst comprises a modified silica support, comprising a titanium modifier metal, and a catalytic metal on the modified silica support, wherein at least a proportion of the modified metal is present in the form of mononuclear titanium moieties or is derived from a mononuclear titanium cation source at the commencement of the modification.