Patent US6356543B2 successfully refreshed from Google Patents.
Patent EP0974571A2 successfully refreshed from Google Patents.
EP0974571A2
Expired / Lapsed
EP
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Preparation of 1,1,1,3-tetrafluoropropene( 1234ze )
Assignee: Arkema Inc
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Filing: 1999-07-21
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Granted: —
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Expires: 2019-07-21
Abstract
Abstract Disclosed is a process for the preparation of cis/trans 1,1,1,3-tetrafluoro-2-propene (1234 ze) which comprises (a) contacting 1,1,1,3,3-pentafluoropropane (245fa) with an alkaline solution, preferably an aqueous or alcoholic solution of a base such as KOH, NaOH, Ca(OH) 2 or Mg(OH) 2 , or with a chromium-based catalyst, such as fluorided Cr 2 O 3 or fluorided Cr/Ni/Alf 3 , and (b) recovering cis/trans 1,1,1,3-tetrafluoro-2-propene from the reaction mixture.
Inventors
- 👤 Maher Yousef Elsheikh
- 👤 Paul David Fellenger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 03:31
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/25
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
32 words
A process for the preparation of cis/trans 1,1,1,3-tetrafluoro-2-propene
which comprises (a) contacting 1,1,1,3,3-pentafluoropropane with an
alkaline solution or with a chromium-based catalyst, and (b) recovering cis/trans
1,1,1,3-tetrafluoro-2-propene from the resulting reaction mixture.
Claim 2
Dependent Claim
46 words
A process for the preparation of cis/trans 1,1,1,3-tetrafluoro-2-propene
which comprises (a) contacting 1,1,1,3,3-pentafluoropropane with an
aqueous or alcoholic solution of base selected from the group consisting of
potassium hydroxide, sodium hydroxide, calcium hydroxide or magnesium
hydroxide, and (b) recovering cis/trans 1,1,1,3-tetrafluoro-2-propene from the
resulting reaction mixture.
Claim 3
Dependent Claim
18 words
A process as in Claim 2 wherein step (a) comprises contacting
1,1,1,3,3-pentafluoropropane with an aqueous potassium hydroxide solution.
Claim 4
Dependent Claim
44 words
A process for the preparation of cis/trans 1,1,1,3-tetrafluoro-2-propene
which comprises (a) contacting 1,1,1,3,3-pentafluoropropane with an
oxygen-containing gas in the presence of a fluorided catalyst selected from Cr 2 O 3 or
Cr/Ni/AlF 3 , and (b) recovering cis/trans 1,1,1,3-tetrafluoro-2-propene from the
resulting reaction mixture.
Claim 5
Dependent Claim
16 words
A process as in Claim 4 wherein the catalyst is fluorided Cr 2 O 3 .
Claim 6
Dependent Claim
14 words
A process as in Claim 4 wherein the catalyst is fluorided Cr/Ni/AIF 3 .
References Cited (Backward Citations)
No citation records indexed.
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