Method for producing 1,4-dibromo-2,3-dichlorohexafluorobutane and method for producing hexafluoro-1,3-butadiene using same
AssigneeJin Sung Eng Co., Ltd
InventorsJun Jae JANG, Sang Ik KIM, Wook Jae CHO, Hon Lual PARK
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Abstract
Disclosed is a method for producing 1,4-dibromo-2,3-dichlorohexafluorobutane (Br—CF2—CFCl—CFCl—CF2—Br), in which, through the photoreaction of 1,2-dibromo-1-chlorotrifluoroethane (Br—CF2-CFCl—Br) with a CTFE (CF2═CFCl) gas mixed with a diluent gas, 1,4-dibromo-2,3-dichlorohexafluorobutane is produced. According to an embodiment of the present disclosure, an intermediate for producing hexafluoro-1,3-butadiene (C4F6) can be produced with high production yield.
Claims11
A method of preparing 1,4-dibromo-2,3-dichlorohexafluorobutane (Br—CF2—CFCl—CFCl—CF2—Br), the method comprising:
- reacting a 1,2-dibromo-1-chlorotrifluoroethane (Br—CF2—CFCl—Br) solution diluted with a solvent with CTFE (CF2═CFCl) mixed with a diluent gas by light (UV) initiation to produce 1,4-dibromo-2,3-dichlorohexafluorobutane.
A method of preparing hexafluoro-1,3-butadiene (C4F6) using 1,4-dibromo-2,3-dichlorohexafluorobutane (Br—CF2—CFCl—CFCl—CF2—Br) as an intermediate, the method comprising:
- a photoreaction step of preparing 1,4-dibromo-2,3-dichlorohexafluorobutan by reacting a 1,2-dibromo-1-chlorotrifluoroethane (Br—CF2—CFCl—Br) solution diluted with a solvent with a CTFE (CF2═CFCl) gas mixed with a diluent gas by light (UV) initiation;
- and a dehalogenation step of removing halogens except fluorine from the prepared 1,4-dibromo-2,3-dichlorohexafluorobutane.
Dependencies are inferred from the claim text.