METHOD OF ACTIVATING CATALYST FOR PRODUCING FLUORINE-CONTAINING HYDROCARBONS Russian patent published in 2012 - IPC B01J23/26 B01J21/04 B01J23/86 B01J38/42 C07C17/20 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of activating a catalyst for producing fluorine-containing hydrocarbons via gas-phase hydrofluorination of halohydrocarbons. The catalyst contains chromium (III) oxide and an aluminium (III) compound, whose content ranges from 2 to 15 wt % in terms of Al₂O₃, and additionally contains a metal compound, where the metal Me is selected from either iron or nickel or cobalt or zinc or copper or magnesium any mixture in amount of 0.1-1.5 wt % in terms of oxides. The activation process is carried in four steps: a) drying the catalyst in a current of nitrogen at temperature 100-200°C and atmospheric pressure; b) treating the catalyst with difluorochloromethane (R-22) at temperature 300-370°C and atmospheric pressure; c) treating the catalyst with a mixture of hydrogen fluoride and nitrogen at temperature 340-370°C and atmospheric pressure, while gradually increasing hydrogen fluoride concentration in the mixture with nitrogen to 100 mol %; d) treating the catalyst with hydrogen fluoride at temperature 340-370° and pressure of up to 0.4 MPa.

EFFECT: cutting overall duration of activation, avoiding overheating in the catalyst grain, preserving catalyst activity and high efficiency of the process of producing fluorine-containing hydrocarbons.

1 cl, 6 tbl, 9 ex