Abstract: The present invention provides a process for producing 2,3,3,3-tetrafluoropropene represented by the formula CF3CF?CH2, comprising contacting a fluorine-containing propane represented by the formula CF2XCFYCH2Z, wherein X is Cl, Br, or I; one of Y and Z is H, and the other is F, Cl, Br, or I, with at least one catalyst selected from the group consisting of chromium oxides, fluorinated chromium oxides, and iron fluorides in a gas phase. According to the process of the invention, 2,3,3,3-tetrafluoropropene can be easily produced under economically advantageous conditions.

Abstract: The present invention provides a method for producing an olefin represented by General Formula (II): RfCF?CH2 (II) (wherein Rf is defined as below), wherein the method includes the step of contacting a fluorohalide represented by General Formula (I): RfCF2CH2X (I) (wherein Rf is H(CF2)n (n=1 to 8) or F(CF2)n (n=1 to 8), and X is Br or I) with a metal in a reaction medium of a polar organic solvent, or a mixed solvent of water and a polar organic solvent to conduct a dehalogenation reaction. The production method of the present invention provides olefins in a highly selective manner at a low cost and high yield under relatively mild reaction conditions.

Abstract: The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene comprising the steps of: (a) reacting 3,3,3-trifluoropropyne with hydrogen fluoride while heating to obtain a product containing 2,3,3,3-tetrafluoropropene; (b) separating the product obtained in Step (a) into Component A containing 2,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropyne, and Component B containing 1,3,3,3-tetrafluoropropene; (c) separating 2,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropyne contained in Component A obtained in Step (b) into each compound; (d) conducting a dehydrofluorination reaction by heating Component B obtained in Step (b) in the presence of a catalyst; (e) separating the product obtained in Step (d) into Component C containing 2,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropyne, and Component D containing 1,3,3,3-tetrafluoropropene; (f) separating 2,3,3,3-tetrafluoropropene and 3,3,3-trifluoropropyne contained in Component C obtained in Step (e) into each compound; and (g) conducting a d

Abstract: The present invention provides a process for producing 1,1,1,3,3,3-hexafluoro-2-methoxypropane, wherein a novel compound, 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof is decarboxylated, or wherein an olefin compound represented by chemical formula (4): CF2?C(CF3)(OCH3) is reacted with a fluorinating agent; and a process for producing 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof by reacting a hydroxycarboxylic ester with a methylating agent and then hydrolyzing the reaction product, or hydrolyzing the hydroxycarboxylic ester and then reacting the resulting product with a methylating agent. In accordance with the invention, 1,1,1,3,3,3-hexafluoro-2-methoxypropane, which is useful as a raw material for, for example, the anesthetic Sevoflurane, can be produced efficiently and at low cost.

Abstract: The present invention provides a process for producing 2,3,3,3-tetrafluoropropene represented by the formula CF3CF?CH2, comprising contacting a fluorine-containing propane represented by the formula CF2XCFYCH2Z, wherein X is Cl, Br, or I; one of Y and Z is H, and the other is F, Cl, Br, or I, with at least one catalyst selected from the group consisting of chromium oxides, fluorinated chromium oxides, and iron fluorides in a gas phase. According to the process of the invention, 2,3,3,3-tetrafluoropropene can be easily produced under economically advantageous conditions.

Abstract: The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene represented by CF3CF?CH2 and 1,3,3,3-tetrafluoropropene represented by CF3CH?CHF, in which 3,3,3-trifluoropropyne represented by the chemical formula CF3C?CH is reacted with hydrogen fluoride under heating. The process of the present invention is a simple, effective and industrially applicable process for preparing 2,3,3,3-tetrafluoropropene and 1,3,3,3-tetrafluoropropene.

Abstract: The present invention provides a process for preparing a fluorine-containing propene represented by the chemical formula CF3CF?CX1X2, wherein X1 is a hydrogen atom or chlorine atom, and X2 is a fluorine atom, chlorine atom, or hydrogen atom, by reacting a halogenated propene represented by the chemical formula CCIYZCF?CX1X2, wherein X1 and X2 are the same as above, and Y and Z may be the same or different and individually indicate a fluorine atom or chlorine atom, with anhydrous hydrogen fluoride in a gas phase in the presence of a chromium oxide or a fluorinated chromium oxide as a fluorination catalyst. The process of the present invention provides a fluorine-containing propene represented by the chemical formula CF3CF?CClX, wherein X is Cl, H or F, under relatively mild conditions at a high yield.

Abstract: The invention provides a compound which is useful in production of a fluoropolymer and easy to be removed from the produced fluoropolymer, a method of producing the compound, and a method of producing a fluoropolymer using the compound. The invention provides a compound which is represented by Rf1—CH2O—CF2—CHF—Rf2—X, wherein Rf1 represents a fluoroalkyl group containing 1 to 5 carbon atoms, Rf2 represents a fluoroalkylene group containing 1 to 3 carbon atoms, X represents —COOM or —SO3M, and M represents one of H, K, Na, and NH4.

Abstract: The present invention provides a method for producing a fluoroalkyl alcohol represented by general formula (6) wherein Rf1 and Rf2 are the same or different, each represents a CF3(CF2)n group (wherein n is an integer of 0 to 10) or a CH3(CH2)m group (wherein m is an integer of 0 to 10), and at least one of Rf1 and Rf2 represents a CF3(CF2)n group, the method comprising: decarboxylating a compound represented by general formula (1) wherein Rf1 and Rf2 are the same as above; and R1 represents an optionally substituted alkyl group, an optionally substituted aryl group, an optionally substituted aralkyl group, an alkali metal, or M1/2 (wherein M represents an alkaline earth metal), in the presence of at least one member selected from the group consisting of pyridines, amines, quaternary ammonium salts, and quaternary phosphonium salts.

Abstract: The present invention provides a method for producing an olefin represented by General Formula (II): RfCF?CH2 (II) (wherein Rf is defined as below), wherein the method includes the step of contacting a fluorohalide represented by General Formula (I): RfCF2CH2X (I) (wherein Rf is H(CF2)n (n=1 to 8) or F(CF2)n (n=1 to 8), and X is Br or I) with a metal in a reaction medium of a polar organic solvent, or a mixed solvent of water and a polar organic solvent to conduct a dehalogenation reaction. The production method of the present invention provides olefins in a highly selective manner at a low cost and high yield under relatively mild reaction conditions.

Abstract: The present invention provides a method for producing a fluorine-containing halide, comprising reacting a fluorine-containing sulfonyl halide or fluorine-containing disulfonyl chloride with a metal halide or metal component in the present or absence of a solvent. In accordance with the present invention, a fluorine-containing bromide, fluorine-containing iodide or fluorine-containing chloride can be readily produced in high yield at low cost, using an industrially advantageous process.

Abstract: The present invention provides a process for producing 1,1,1,3,3,3-hexafluoro-2-methoxypropane, wherein a novel compound, 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof is decarboxylated, or wherein an olefin compound represented by chemical formula (4): CF2?C(CF3)(OCH3) is reacted with a fluorinating agent; and a process for producing 2-methoxy-2-trifluoromethyl-3,3,3-trifluoropropionic acid or a salt thereof by reacting a hydroxycarboxylic ester with a methylating agent and then hydrolyzing the reaction product, or hydrolyzing the hydroxycarboxylic ester and then reacting the resulting product with a methylating agent. In accordance with the invention, 1,1,1,3,3,3-hexafluoro-2-methoxypropane, which is useful as a raw material for, for example, the anesthetic Sevoflurane, can be produced efficiently and at low cost.

Abstract: The present invention provides a method of producing a fluorine-containing fluorosulfonylalkyl vinyl ether represented by the formula CF2=CFOCF2CF2SO2F, the method comprising reacting a fluorine-containing chlorosulfonylalkyl vinyl ether represented by the formula CF2=CFOCF2CF2SO2Cl with a fluorinating agent represented by the formula KF·(HF)n (wherein n is 0 to 5) in a polar organic solvent at a temperature not higher than 70° C. The method of the invention produces the fluorine-containing fluorosulfonylalkyl vinyl ether in high yield at low cost in a simple, industrially advantageous manner.

Abstract: The present invention provides a method for producing a fluorine-containing halide, comprising reacting a fluorine-containing sulfonyl halide or fluorine-containing disulfonyl chloride with a metal halide or metal component in the present or absence of a solvent. In accordance with the present invention, a fluorine-containing bromide, fluorine-containing iodide or fluorine-containing chloride can be readily produced in high yield at low cost, using an industrially advantageous process.

Abstract: The present invention provides a process for producing a fluorinated fluorosulfonylalkyl vinyl ether represented by general formula (2): CF2?CFO(CF2CF(CF3)O)nCF2CF2SO2F??(2) wherein n is an integer from 0 to 10, comprising fluorinating a perfluorovinylether sulfonate with SF4 and HF, the perfluorovinylether sulfonate being represented by general formula (1): CF2?CFO(CF2CF(CF3)O)nCF2CF2SO3M??(1) wherein M is Ma or Mb1/2, provided that Ma is an alkali metal and Mb is an alkaline earth metal; and n is as defined above. According to the process of the invention, the fluorinated fluorosulfonylalkyl vinyl ether can be produced in high yield in an industrially advantageous manner.

Abstract: The present invention provides a process for producing a fluorinated fluorosulfonylalkyl vinyl ether represented by general formula (2): CF2=CFO(CF2CF(CF3)O)nCF2CF2SO2F??(2) wherein n is an integer from 0 to 10, comprising fluorinating a perfluorovinylether sulfonate with SF4 and HF, the perfluorovinylether sulfonate being represented by general formula (1): CF2=CFO(CF2CF(CF3)O)nCF2CF2SO3M??(1) wherein M is Ma or Mb1/2, provided that Ma is an alkali metal and Mb is an alkaline earth metal; and n is as defined above. According to the process of the invention, the fluorinated fluorosulfonylalkyl vinyl ether can be produced in high yield in an industrially advantageous manner.

Abstract: A method of producing (RfCO)2O by reacting RfCOCl with MmCO3 can efficiently synthesize a fluorocarboxylic anhydride in a one-step reaction, wherein Rf is a saturated hydrocarbon group having 1 to 20 carbon atoms, which optionally has an oxygen atom, in which all or part of hydrogen atoms are substituted with a fluorine atom, or a fluorine atom and another halogen atom, M is an alkali metal or an alkali earth metal, m is 2 when M is the alkali metal, or 1 when M is the alkali earth metal.

Abstract: A method of producing (RfCo)2O by reacting RfCOCl with MmCO3 can efficiently synthesize a fluorocarboxylic anhydride in a one-step reaction,