US 12,006,286 B2
Method for transesterification of carboxylic acid esters
Jamal Ftouni, Zofingen (CH); Matthias Welker, Hésingue (FR); and Samuel Rentsch, Spiegel bei Bern (CH)
Assigned to OMYA INTERNATIONAL AG, Oftringen (CH)
Appl. No. 16/981,858
Filed by OMYA INTERNATIONAL AG, Oftringen (CH)
PCT Filed Mar. 19, 2019, PCT No. PCT/EP2019/056826
§ 371(c)(1), (2) Date Sep. 17, 2020,
PCT Pub. No. WO2019/180012, PCT Pub. Date Sep. 26, 2019.
Claims priority of application No. 18163580 (EP), filed on Mar. 23, 2018.
Prior Publication US 2021/0122696 A1, Apr. 29, 2021
Int. Cl. B01J 23/02 (2006.01); B01J 35/40 (2024.01); B01J 35/50 (2024.01); B01J 35/61 (2024.01); B01J 37/08 (2006.01); C07C 67/03 (2006.01)
CPC C07C 67/03 (2013.01) [B01J 23/02 (2013.01); B01J 35/40 (2024.01); B01J 35/50 (2024.01); B01J 35/613 (2024.01); B01J 35/615 (2024.01); B01J 37/088 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A transesterification catalyst comprising partially or fully calcined surface-reacted calcium carbonate, wherein the calcination is carried out at a calcination temperature of at least 650° C.,
wherein the transesterification catalyst has a specific surface area of from 15 to 200 m2/g, measured using nitrogen and the BET method according to ISO 9277:2010, and
wherein the surface-reacted calcium carbonate is a reaction product of ground natural calcium carbonate containing mineral (GNCC) or precipitated calcium carbonate (PCC) with carbon dioxide and one or more H3O+ ion donors and wherein the carbon dioxide is formed in situ by a reaction with the H3O+ ion donors and/or is supplied from an external source, and
wherein the surface-reacted calcium carbonate has a specific surface area of from 15 to 200 m2/g, measured using nitrogen and the BET method according to ISO 9277:2010.