PROCESS FOR PREPARING ALKYLATION CATALYSTS

摘要

"IMPROVED PROCESS FOR PREPARING ALKYLATION CATALLYSTS" Preparation of alkylation catalysts containing iron and/or chromium oxide, by means of a process which comprises: a) precipitating hydrate oxides of iron and/or chromium from an aqueous solution of soluble compounds of said elements; b) separating the thus obtained precipitate, and washing said precipitate; c) granulating the washed precipitate, and drying the granules so obtained; d) calcining said dried granules at high temperature; in which an organic carboxyl acid salt of iron and/or chromium is added to and homogenized with the washed precipitate from stage b), and/or the dried granules from stage c) are impregnated with an aqueous solution of an organic carboxyl acid salt of iron and/or chromium. The catalysts obtained by means of the above process are mechanically strong, and highly active in the production process of 2,6-xylenol by means of the alkylation of phenol or o-cresol with methanol.