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US 12,709,589 B2Granted
Method for producing an iodofluoroalkane compound
AssigneeArkema France
InventorLaurent Wendlinger
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Abstract
The present invention relates to a process for producing an iodofluoroalkane compound, comprising the steps of: a) placing a fluoroolefin in contact with hydrogen iodide to form a stream A comprising said iodofluoroalkane compound and unreacted hydrogen iodide, b) separating said stream A into a first stream B1 comprising said iodofluoroalkane compound and a stream B2 comprising unreacted hydrogen iodide, c) recycling stream B2 into step a).
Claims20
A process for producing an iodofluoroalkane compound, comprising the steps of:
- a) placing a fluoroolefin in contact with hydrogen iodide to form a stream A comprising said iodofluoroalkane compound and unreacted hydrogen iodide,
- b) separating said stream A into a first stream B1 comprising said iodofluoroalkane compound and a stream B2 comprising unreacted hydrogen iodide, and
- c) recycling stream B2 into step a),
- wherein step a) is performed in the gas phase and optionally performed with a catalyst, and
- if step a) is performed in the presence of a catalyst, the catalyst is selected from the group consisting of an oxide, oxyhalide or halide of an element chosen from Li, Na, K, Cs, Mg, Cr and Ca.
2 more elements
A process for producing an iodofluoroalkane compound, comprising:
- placing a fluoroolefin in contact with hydrogen iodide in the liquid phase in the presence of a solvent S1,
- wherein said fluoroolefin is of formula (I) (R1)(R2)C═C(R3)(R4) in which R1, R2, R3 and R4 are, independently of each other, chosen from the group consisting of H, F, I, a C1-C5 perfluoroalkyl radical, a C5-C10 perfluorocycloalkyl radical, a C2-C5 perfluoroalkenyl radical, a C5-C10 perfluorocycloalkenyl radical, and a C6-C10 perfluoroaryl radical;
- provided that at least one of the substituents R1, R2, R3 or R4 is F or is a perfluoro radical as defined above;
- wherein said fluoroolefin has a boiling point below 100° C. at atmospheric pressure;
- wherein the solvent S1 has a boiling point of from 0° C. to 250° C. and is chosen from the group consisting of acetic acid, CC14, chloroform, dichloromethane, sulfolane, tetramethylene sulfone, N,N-dimethylformamide, dimethyl sulfoxide, N,N-dimethylacetamide, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, 1,3-dimethyl-3,4,5,6-tetrahydro-2-pyrimidinone, and mixtures thereof;
- wherein the process is performed in the presence of a catalyst chosen from alkali metal or alkaline-earth metal salts;
- and
- wherein the process is performed at a temperature of from 50° C. to 280° C.
5 more elements
Dependencies are inferred from the claim text.