Abstract: The present invention provides a novel method for producing a mixture of fluoroalkyl iodides with high production efficiency, the method enabling the production of a desired fluoroalkyl iodide with high selectivity.

Abstract: The present invention provides a novel method for producing a mixture of fluoroalkyl iodides with high production efficiency, the method enabling the production of a desired fluoroalkyl iodide with high selectivity.

Abstract: A novel process for producing a fluoroalkyl iodide telomer is provided, which is able to obtain a fluoroalkyl iodide telomer having a desired chain length, efficiently. A fluoroalkyl iodide represented by the general formula RfI (wherein Rf is a C1-10 fluoroalkyl group) and tetrafluoroethylene are used as a telogen and a taxogen, respectively. These compounds are supplied to a distillation apparatus. In a reaction zone located in an intermediate part of the distillation apparatus, the compounds are subjected to a telomerization reaction in the presence of a metal catalyst with heating to generate a fluoroalkyl iodide telomer represented by the general formula Rf(CF2CF2)nI (wherein Rf is the same as defined above and n is an integer of 1-4). Thereafter, a fraction comprising the fluoroalkyl iodide telomer is separated by distillation.

Abstract: There is provided a method for separating and collecting at least alcohol with a high purity from an azeotropic mixture of olefin and alcohol.

Abstract: A novel process for producing a fluoroalkyl iodide telomer is provided, which is able to obtain a fluoroalkyl iodide telomer having a desired chain length, efficiently. A fluoroalkyl iodide represented by the general formula RfI (wherein Rf is a C1-10 fluoroalkyl group) and tetrafluoroethylene are used as a telogen and a taxogen, respectively. These compounds are supplied to a distillation apparatus. In a reaction zone located in an intermediate part of the distillation apparatus, the compounds are subjected to a telomerization reaction in the presence of a metal catalyst with heating to generate a fluoroalkyl iodide telomer represented by the general formula Rf(CF2CF2)nI (wherein Rf is the same as defined above and n is an integer of 1-4). Thereafter, a fraction comprising the fluoroalkyl iodide telomer is separated by distillation.

Abstract: There is provided a method for separating and collecting at least alcohol with a high purity from an azeotropic mixture of olefin and alcohol.

Abstract: In a first sulfation step, 2-perfluoroalkylethyl iodide is brought into contact with fuming sulfuric acid to obtain a reaction mixture comprising 2-perfluoroalkylethyl sulfate and bis(2-perfluoroalkylethyl)sulfate. Then, in a first hydrolysis step, 2-perfluoroalkylethyl sulfate produced in the first sulfation step is hydrolyzed to obtain a reaction mixture comprising 2-perfluoroalkylethyl alcohol. In a second sulfation step, bis(2-perfluoroalkylethyl)sulfate produced in the first sulfation step is brought into contact with fuming sulfuric acid to obtain a reaction mixture comprising 2-perfluoroalkylethyl sulfate. Then, in a second hydrolysis step, 2-perfluoroalkylethyl sulfate produced in the second sulfation step is hydrolyzed to obtain a reaction mixture comprising 2-perfluoroalkylethyl alcohol. According to such procedures, 2-perfluoroalkylethyl alcohol can be obtained in a high yield.

Abstract: In a first sulfation step, 2-perfluoroalkylethyl iodide is brought into contact with fuming sulfuric acid to obtain a reaction mixture comprising 2-perfluoroalkylethyl sulfate and bis(2-perfluoroalkylethyl)sulfate. Then, in a first hydrolysis step, 2-perfluoroalkylethyl sulfate produced in the first sulfation step is hydrolyzed to obtain a reaction mixture comprising 2-perfluoroalkylethyl alcohol. In a second sulfation step, bis(2-perfluoroalkylethyl)sulfate produced in the first sulfation step is brought into contact with fuming sulfuric acid to obtain a reaction mixture comprising 2-perfluoroalkylethyl sulfate. Then, in a second hydrolysis step, 2-perfluoroalkylethyl sulfate produced in the second sulfation step is hydrolyzed to obtain a reaction mixture comprising 2-perfluoroalkylethyl alcohol. According to such procedures, 2-perfluoroalkylethyl alcohol can be obtained in a high yield.

Abstract: A mixture of fluoroalkyl iodides of the formula C2F5(CF2CF2)nI (“n” is an integer of ?0) wherein the sum of such fluoroalkyl iodides of n=3 and n=4 contained is ?85 mol % is provided. This mixture is subjected to an ethylene addition step and an esterification step, and C2F5(CF2CF2)nCH?CH2 and C2F5(CF2CF2)nCH2CH2OH are removed. Thus, there can be obtained a mixture of fluorine-containing (meth)acrylic esters of the formula C2F5(CF2CF2)nCH2CH2OCOCR1?CH2 (wherein R1 represents a hydrogen atom or a methyl group, and “n” is an integer of ?0) wherein the content of impurities (namely, olefins of the formula C2F5(CF2CF2)nCH?CH2 and alcohols of the formula C2F5(CF2CF2)nCH2CH2OH) is low.

Abstract: A mixture of fluoroalkyl alcohols represented by C2F5(CF2CF2)nCH2CH2OH wherein “n” is an integer equal to or more than 0 wherein the sum of the fluoroalkyl alcohols of n=3 and n=4 contained is 85 mol % or more is prepared and reacted with an acrylic acid compound followed by removing unreacted C2F5(CF2CF2)nCH2CH2OH, to give a mixture of fluorine-containing acrylic esters wherein the content of impurities (that is, olefins represented by C2F5(CF2CF2)nCH?CH2 and the alcohols represented by C2F5(CF2CF2)nCH2CH2OH) is low.

Abstract: A mixture of fluorine-containing acrylic esters represented by CF3(CF2)nCH2CH2OCOCR1?CH2 wherein R1 is a hydrogen atom, a methyl group or a halogen atom and “n” is an integer of at least zero is subjected to distillation under such conditions that the esters are not polymerized, so as to give a mixture of the esters with a less content of impurities (that is, olefins represented by CF3(CF2)nCH?CH2 and alcohols represented by CF3(CF2)nCH2CH2OH) at a high yield.