CATALYST, PREPARATION METHOD THEREOF AND METHOD OF FLUORINATING HALOGENATED HYDROCARBONS Russian patent published in 2010 - IPC B01J23/26 B01J21/04 B01J23/86 B01J21/10 B01J23/06 B01J37/03 B01J37/26 C07C17/20 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and catalysts used in reactions for gas-phase fluorination of halogenated hydrocarbons. The invention describes a catalyst for fluorination of halogenated hydrocarbons using hydrogen fluoride gas which contains chromium (III) oxide, an aluminium (III) compound whose content is 2-15 wt % in terms of Al₂O₃, wherein the mixed chromium (III) oxide and aluminium (III) oxide have specific surface area of 130-300 m²/g, pore volume of not less than 0.3 cm³/g and monomodal pore size distribution in the interval 70-300 A, and a metal Me compound selected from a group comprising iron, nickel, cobalt, zinc, copper, magnesium or any of their mixture in amount of 0.1-1.5 wt % in terms of oxide, and the catalyst is in form of cylindrical granules with diametre of 3-10 mm. The invention describes a method of preparing catalysts and a method of fluorinating halogenated hydrocarbons with hydrogen fluoride gas in the presence of the catalyst described above at pressure of 0.1-0.5 MPa, temperature of 260-380°C and molar ratio HF: halohydrocarbon equal to 4:1-40:1.

EFFECT: higher low-temperature activity of the catalyst.

18 cl, 14 ex, 2 tbl