US 11,702,378 B2
Catalytic hydrogenation of fluoroolefins, alpha-alumina supported palladium compositions and their use as hydrogenation catalysts
Patricia Cheung, Glen Mills, PA (US); and Concetta Lamarca, Wilmington, DE (US)
Assigned to THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US)
Filed by THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US)
Filed on Sep. 20, 2021, as Appl. No. 17/479,620.
Application 15/415,960 is a division of application No. 14/115,661, granted, now 9,598,336, issued on Mar. 21, 2017, previously published as PCT/US2012/003822, filed on May 16, 2012.
Application 17/479,620 is a continuation of application No. 16/849,059, filed on Apr. 15, 2020, granted, now 11,124,469.
Application 16/849,059 is a continuation of application No. 16/291,548, filed on Mar. 4, 2019, granted, now 10,633,311, issued on Apr. 28, 2020.
Application 16/291,548 is a continuation of application No. 15/415,960, filed on Jan. 26, 2017, granted, now 10,221,113, issued on Mar. 5, 2019.
Claims priority of provisional application 61/486,472, filed on May 16, 2011.
Prior Publication US 2022/0002219 A1, Jan. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 17/354 (2006.01); B01J 21/04 (2006.01); B01J 23/44 (2006.01); B01J 35/10 (2006.01); C07C 21/18 (2006.01); C07C 19/08 (2006.01)
CPC C07C 17/354 (2013.01) [B01J 21/04 (2013.01); B01J 23/44 (2013.01); B01J 35/1009 (2013.01); C07C 19/08 (2013.01); C07C 21/18 (2013.01); C07C 2523/44 (2013.01)] 14 Claims
 
1. A process comprising flowing a composition comprising at least one fluoroolefin across a bed of a palladium catalyst supported on a carrier comprising α-Al2O3, the bed having a front and a back, the composition flowing from the front of the bed to the back of the bed, wherein a concentration of the palladium catalyst in the bed spatially increases continuously from a first concentration of palladium catalyst in the front of the bed to a second concentration of palladium catalyst in the back of the bed, the second concentration of palladium catalyst being greater than the first concentration of palladium catalyst, wherein the at least one fluoroolefin has the formula CnHmF2n−m, wherein n is an integer from 2 to 8 and m is an integer from 0 to 2n−1.