US 12,304,880 B2
Method for dehydrochlorination of HCFC-244BB to manufacture HFO-1234YF
Haluk Kopkalli, Staten Island, NY (US); Carlos Navar, Baton Rouge, LA (US); Yuon Chiu, Denville, NJ (US); and Haiyou Wang, Amherst, NY (US)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed on Dec. 12, 2022, as Appl. No. 18/079,677.
Application 18/079,677 is a continuation of application No. 16/972,473, granted, now 11,555,001, previously published as PCT/US2019/035609, filed on Jun. 5, 2019.
Application 16/972,473 is a continuation in part of application No. 16/001,728, filed on Jun. 6, 2018, abandoned.
Prior Publication US 2023/0123085 A1, Apr. 20, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C07C 17/25 (2006.01); C07C 17/38 (2006.01); C07C 17/383 (2006.01)
CPC C07C 17/25 (2013.01) [C07C 17/38 (2013.01); C07C 17/383 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A process for making 2,3,3,3-tetrafluoropropene (HFO-1234yf), the process comprising:
providing a composition including at least 96 wt. % 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) to a reactor including a heater surface at a surface temperature from about 975° F. (524° C.) to about 1,005° F. (541° C.); and
bringing the composition into contact with the heater surface for a contact time of less than 10 seconds to dehydrochlorinate a portion of the HCFC-244bb to make a final product stream comprising HFO-1234yf, wherein the HFO-1234yf includes 1,1,1,2-tetrafluoroethane (HFC-134a) at a concentration from 0.0001 wt. % to 0.010 wt. % on an HCFC-244bb-free basis.