Patent ID: 6436362
Filing Date: 2002-08-20
Classification: B01J,C01F

Abstract:
A process for preparing aluminum fluoride which is a support for preparing catalysts for the fluorination of halogenated organic compounds, wherein said process consists essentially of fluorinating alumina having a surface area of at least 150 mm2/g with gaseous HF, at an initial temperature lower than 300Â° C.;raising the temperature with a temperature gradient <100Â° C./hour up to a final temperature in the range 350Â° C.-400Â° C.; continuing fluorination at the final temperature until feeding an HF molar amount at least equal and up to 1.3 times greater than the stoichiometric with respect to the alumina; and fluorinating until a fluorinated alumina with a fluorine content not less than 95% of the stoichiometric is obtained.