| abstract |
An inexpensive and highly safe process for producing one or more fluoromethanes selected from dichlorofluoromethane, chlorodifluoromethane, chlorofluoromethane and difluoromethane without using hydrogen fluoride as a reaction raw material. Provide a method. Trichloromethane and / or dichloromethane are represented by the formula: CwFxClyHz (wherein w is an integer of 1 or more, x is an integer of 1 to 2w + 2 and y and z are integers of 0 to 2w + 1). A raw material composition containing at least one fluorocarbon is contacted with a metal catalyst to fluorinate the trichloromethane and / or the dichloromethane, the trichloromethane to dichlorofluoromethane or chlorodifluoromethane, and the dichloromethane to chloro Provided is a method for producing fluoromethanes which is converted into fluoromethane or difluoromethane, respectively. [Selection] Figure 1 |