Hexachloroethane → 1,1-Dichloro-1,2,2,2-tetrafluoroethane

Participants

Reaction Steps

In the reactor 101, GeF4 and hexachloroethane in the reaction feed contact the catalyst (e.g., AlCl3) held in the catalyst bed. The reactor 101 can be at a temperature of about 220° to about 375° C. and at a pressure of about 500 to 800 psig (i.e., about 3.45 MPa to about 5.52 MPa). In one embodiment, the inventor has observed that hexachloroethane and GeF4 in the reaction feed can react to form CFC-113 with high yield and good selectivity at a reaction temperature of about 310° C. and a molar ratio of hexachloroethane to GeF4 of about 1:1.67. Other potential fluorination products can include 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a), 1,2-dichloro-1,2,2,2-tetrafluoroethane (CFC-114a), 1-chloro-1,1,2,2,2-pentafluoroethane (CFC-115), and/or other fluorine-substituted chloroethanes. In another embodiment, the inventor has observed that hexachloroethane and GeF4 in the reaction feed can react to form CFC-114a (about 73%) and CFC-115 (about 27%) at a reaction temperature of about 340° C. and a molar ratio of hexachloroethane to GeF4 of about 1:2.75.

Provenance & Evidence