| 摘要 |
<p>This invention provides a catalyst for fluorinating halohydrocarbon, which consists of a support and active components deposited thereon. Said support is active AlF3 prepared by fluorinating silica (SiO2) containing gamma-alumina at 150-300 °C with a mixture of anhydrous hydrogen fluoride and nitrogen. Said active components contain chromium, cobalt and magnesium in a proportion of Cr:Co:Mg=1-10:1:0.1 (weight ratio). The catalyst is obtained by impregnating said active A1F3 with a solution of chlorides of Cr, Co and Mg. The catalyst which is useful in the fluorinating of trichlorethylene in the vapor phase to form R-134a has high activity, selectivity and a long life of use.</p> |
