US 12,434,225 B2
Catalyst and a process for the production of ethylenically unsaturated carboxylic acids or esters
Jonathan Runnacles, Redcar (GB); David William Johnson, Redcar (GB); Toshio Hasegawa, Hiroshima (JP); Kazufumi Nishida, Hiroshima (JP); and Wataru Ninomiya, Hiroshima (JP)
Assigned to MITSUBISHI CHEMICAL UK LIMITED, Billingham (GB)
Appl. No. 17/630,014
Filed by Mitsubishi Chemical UK Limited, Billingham (GB)
PCT Filed Jul. 24, 2020, PCT No. PCT/GB2020/051793
§ 371(c)(1), (2) Date Jan. 25, 2022,
PCT Pub. No. WO2021/019224, PCT Pub. Date Feb. 4, 2021.
Claims priority of application No. 1910754 (GB), filed on Jul. 26, 2019.
Prior Publication US 2022/0250035 A1, Aug. 11, 2022
Int. Cl. B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 21/10 (2006.01); B01J 21/14 (2006.01); B01J 23/04 (2006.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 35/64 (2024.01); B01J 35/66 (2024.01); B01J 35/69 (2024.01); C07C 51/353 (2006.01); C07C 67/343 (2006.01)
CPC B01J 23/04 (2013.01) [B01J 21/066 (2013.01); B01J 21/08 (2013.01); B01J 35/613 (2024.01); B01J 35/615 (2024.01); B01J 35/617 (2024.01); B01J 35/633 (2024.01); B01J 35/647 (2024.01); B01J 35/651 (2024.01); B01J 35/69 (2024.01); C07C 51/353 (2013.01); C07C 67/343 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A catalyst comprising:
a silica support, a modifier metal and a catalytic alkali metal,
wherein the silica support has a multimodal pore size distribution comprising:
a) a mesoporous pore size distribution having an average pore size in the range 2 to 50 nm and a pore volume of said mesopores of at least 0.1 cm3/g; and
b) a macroporous pore size distribution having an average pore size of more than 50 nm and a pore volume of said macropores of at least 0.1 cm3/g,
wherein the amount of catalytic alkali metal supported on the silica support is at least 2 mol %,
and wherein the modifier metal is selected from a group consisting of Mg, B, Al, Ti, Zr and Hf.