Method and apparatus for producing fluorine-containing organic compound
Provided is a method for producing a fluorine-containing organic compound. The method can immediately detect the occurrence of a side reaction in direct fluorination reaction using fluorine gas and can give a highly pure fluorine-containing organic compound at a high yield. A raw material liquid ( 1 ) containing a raw material organic compound having a hydrogen atom and two or more carbon atoms is reacted with fluorine gas in a reaction container ( 11 ) to replace the hydrogen atom of the raw material organic compound with a fluorine atom to give a fluorine-containing organic compound. In the reaction, tetrafluoromethane contained in a gas phase ( 2 ) in the reaction container ( 11 ) is continuously measured, and the amount of the fluorine gas supplied to the reaction container ( 11 ) is controlled depending on the measured value of the tetrafluoromethane.
1. A method for producing a fluorine-containing organic compound, the method comprising:
reacting a raw material liquid containing a raw material organic compound having a hydrogen atom and two or more carbon atoms with fluorine gas in a reaction container to replace the hydrogen atom of the raw material organic compound with a fluorine atom to give the fluorine-containing organic compound,
wherein tetrafluoromethane contained in a gas phase in the reaction container is continuously measured, and an amount of the fluorine gas supplied to the reaction container is controlled depending on a measured value of the tetrafluoromethane,
wherein the raw material organic compound is 1,2,3,4-tetrachlorobutane, and the fluorine-containing organic compound is 1,2,3,4-tetrachloro-1,1,2,3,4,4-hexafluorobutane.
2. The method for producing the fluorine-containing organic compound according to claim 1 , wherein the gas phase in the reaction container is introduced to an infrared spectrometer to measure the tetrafluoromethane.
3. The method for producing the fluorine-containing organic compound according to claim 2 , wherein the infrared spectrometer is used to measure peaks around wavelengths of 798 cm −1 , 1240 cm −1 , 1290 cm −1 , 1540 cm −1 , and 2200 cm −1 .
4. The method for producing the fluorine-containing organic compound according to claim 2 , wherein when the peak around a wavelength of 1290 cm −1 measured with the infrared spectrometer has an intensity exceeding a predetermined intensity, the amount of the fluorine gas supplied is reduced, or the supply of the fluorine gas is stopped.