IP Library › Granted Patent US 11,547,990
Granted Patent B2
US 11,547,990 · App. 17/455,974 · Granted Jan 10, 2023

Selective catalytic dehydrochlorination of hydrochlorofluorocarbons

Inventor: Mario Joseph Nappa (Leesburg, FL)
Assignee: THE CHEMOURS COMPANY FC, LLC
B01J35/1014B01J23/26B01J27/12B01J37/26C07C17/25C07C21/18B01J27/132C07C2527/12
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Quick Facts
Patent No.
US 11,547,990
App. No.
17/455,974
Granted
Jan 10, 2023
Kind
B2
Abstract

A dehydrochlorination process is disclosed. The process involves contacting R f CHClCH 2 Cl with a chromium oxyfluoride catalyst in a reaction zone to produce a product mixture comprising R f CCl═CH 2 , wherein R f is a perfluorinated alkyl group.

Claims (8)

1. A composition comprising R f CCl═CH 2 and a dehydrochlorination catalyst having the formula Cr 2 O x F y , wherein x+y/2=3, wherein R f , is a perfluorination alkyl group.

2. The composition according to claim 1 wherein R f is CF 3 .

3. The composition according to claim 1 wherein R f is CF 2 CF 3 .

4. The composition according to claim 1 wherein HF is additionally present.

5. The composition according to claim 1 wherein an inert gas is additionally present.

6. The composition according to claim 1 wherein the dehydrochlorination catalyst has a surface area of from 10 m 2 /g to 800 m 2 /g.

7. The composition according to claim 1 wherein the dehydrochlorination catalyst contains an alkali metal content of from 2000 parts-per-million or less.

8. The composition according to claim 7 wherein the alkali metal content comprises potassium.

Assignments (1)
SECURITY INTEREST Recorded Mar 2, 2022
From: THE CHEMOURS COMPANY FC, LLC
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 059552/0001 →