Process for the preparation of fluorinated olefin
AssigneeJapan as represented by Director General of Agency of Industrial Science and Technology
InventorsAkira Sekiya, Toshiro Yamada, Mitsuru Sugawara
Life of this patent
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Abstract
In a process for preparing a fluorinated olefin having a carbon—carbon double bond, the carbon atoms of which have a fluorine atom, by reacting a halogenated olefin having at least one carbon—carbon double bond, a carbon atom or the carbon atoms of which bond have a chlorine atom or atoms bound thereto, and, in which the carbon atom or atoms with a single bond in the molecule have no halogen atom other than a fluorine atom, with an alkali metal fluoride, said reaction of the halogenated olefin with the alkali metal fluoride is conducted in the presence of an organic halogen-containing compound having a carbon—carbon single bond, a carbon or the carbons of which have at least one halogen atom other than fluorine atom.
Claims15
A process for producing a fluorinated olefin represented by formula (3):
- R5FC═CFR6 (3)
- wherein R5 and R6 independently represent an alkyl or fluoroalkyl group or a fluorine atom, or R5 and R6 are bonded together to form an alkylene or fluoroalkylene group, comprising:
- reacting a halogenated olefin represented by formula (1):
- R1ClC═CClR2 (1)
- wherein R1 and R2 independently represent an alkyl group, a fluoroalkyl group or a fluorine atom, or R1 and R2 are bonded together to form an alkylene group or a fluoroalkylene group, with an alkali metal fluoride,
- said reaction of the halogenated olefin with the alkali metal fluoride is conducted in the presence of an organic halogen-containing compound represented by formula (2):
- R3X1C═CX2R4 (2)
- wherein X1 and X2 represent a halogen atom, and R3 and R4 independently represent an alkyl group, a haloalkyl group or a halogen atom, or R3 and R4 are bonded together to form a haloalkylene group, and either R3 or R4 has a halogen atom other than a fluorine atom;
- said organic halogen-containing compound of the formula (2) being capable of reacting with the alkali metal fluoride to give the intended halogenated olefin of the formula (3).
Dependencies are inferred from the claim text.