PRODUCTION OF ACID HYDROCARBON CONVERSION CATALYSTS

摘要

A process for the production of a solid acidic catalyst which process comprises reacting a compound of formula XF5 wherein X is phosphorus, arsenic, antimony, bismuth, tantalum, vanadium or niobium with an inorganic oxide containing surface hydroxyl groups and having an Ho value of less than -3.0. The acid strength of a solid surface is defined as its proton-donating ability, quantitatively expressed by Hammett and Deyrup's Ho function where Ho = - log ?H+ f B/f BH+ and where ?H+ is the hydrogen ion activity of the surface acid and fB and fBH+ are activity coefficients of the basic and acid forms, respectively of an adsorbed indicator. In a preferred embodiment alumina is partially fluorinated or sulphonated prior to reaction with the compound XF5, in which X is preferably antimony.