US 11,840,492 B2
Dehydrohalogenation of hydrochlorofluorocarbons
Xuehui Sun, Kennett Square, PA (US); and Karl Krause, Kennett Square, 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. 13, 2022, as Appl. No. 17/812,203.
Application 17/812,203 is a continuation of application No. 17/155,796, filed on Jan. 22, 2021, granted, now 11,440,860.
Application 17/155,796 is a continuation of application No. 15/759,040, granted, now 10,927,061, issued on Feb. 23, 2021, previously published as PCT/US2016/050918, filed on Sep. 9, 2016.
Claims priority of provisional application 62/217,291, filed on Sep. 11, 2015.
Prior Publication US 2022/0348524 A1, Nov. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 17/25 (2006.01); C07C 21/18 (2006.01)
CPC C07C 17/25 (2013.01) [C07C 21/18 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A dehydrohalogenation conversion process comprising vigorously contacting, in one of a batch process and a semi-batch process, a halofluoroalkane of formula RCXYCZQT and a caustic agent, in a solvent comprising at least one of water and alcohol, in the absence of any additional phase transfer catalyst at a temperature in a range of about 20° C. to about 100° C., to form a fluoroolefin of formula RCX═CZQ, wherein R is a perfluorinated alkyl group and X, Z, and Q are independently H or halogen, and one of Y and T is H and the other is Cl, Br, or I, and where the conversion is at least 98% of the maximum based on a starting ratio of caustic agent and halofluoroalkane.