1 results about "Pentafluoroethane" patented technology

The invention discloses a preparation method for pentafluoroethane, which includes the following steps: subjecting trifluoroethane, chlorine and hydrogen fluoride to a gas phase catalysis reaction at the temperature between 80 DEG C and 200 DEG C, wherein the molar ratio of the trifluoroethane and the hydrogen fluoride is 1: (4-10), and the molar ratio of the trifluoroethane and the chlorine is 1 :( 2.0-3.0). According to the preparation method for the pentafluoroethane, the whole process is the obtaining of the pentafluoroethane (HFC125) from the trifluoroethane, thereby the problem that a way of using tetrafluoroethylene or tetrachloroethylene to serve as a raw material results in greatly increasing of the raw material costs or operating costs of the whole process is prevented.