US 11,905,226 B2
Process for the reduction of RƒC≡CX impurities in fluoroolefins
Mario Joseph Nappa, Leesburg, FL (US); Xuehui Sun, Kennett Square, PA (US); and David Richard Corbin, West Chester, PA (US)
Assigned to THE CHEMOURS COMPANY FC LLC, Wilmington, DE (US)
Filed by THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US)
Filed on Jul. 28, 2022, as Appl. No. 17/815,608.
Application 17/815,608 is a continuation of application No. 17/218,446, filed on Mar. 31, 2021, granted, now 11,434,185.
Application 17/218,446 is a continuation of application No. 16/446,840, filed on Jun. 20, 2019, granted, now 10,995,047, issued on May 4, 2021.
Application 16/446,840 is a continuation of application No. 15/973,598, filed on May 8, 2018, granted, now 10,343,961, issued on Jul. 9, 2019.
Application 15/973,598 is a continuation of application No. 15/609,292, filed on May 31, 2017, granted, now 10,246,388, issued on Apr. 2, 2019.
Application 15/609,292 is a continuation of application No. 14/932,042, filed on Nov. 4, 2015, abandoned.
Application 14/932,042 is a continuation of application No. 14/210,640, filed on Mar. 14, 2014, abandoned.
Claims priority of provisional application 61/791,304, filed on Mar. 15, 2013.
Prior Publication US 2022/0363614 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 17/389 (2006.01); C07C 17/25 (2006.01); C07C 17/087 (2006.01)
CPC C07C 17/389 (2013.01) [C07C 17/087 (2013.01); C07C 17/25 (2013.01); Y02P 20/582 (2015.11)] 22 Claims
 
1. A process comprising:
a) providing an activated zeolite comprising at least one zeolite selected from zeolite 5A, zeolite 13X, zeolite LSX, zeolite AW-300, and mixtures thereof;
b) contacting a mixture having at least one Rf≡CCX impurity at a first level, wherein Rf is a straight-chain perfluorinated alkyl group, and X is H, F, Cl, Br, or I, with said activated zeolite at a temperature of between −20° C. to about 200° C.;
c) reducing said first level of said at least one Rf≡CCX impurity to a second level lower than said first level with said activated zeolite; and
d) optionally, recovering a purified mixture having an impurity level lower than said first level.