FREMGANGSMAATE FOR FREMSTILLING AV KATALYSATORER FOR FREMSTILLING AV 2,6-XYLENOL

• Main Authors: MISTA, WLODZIMIERZ, GRABOWSKA, HANNA, PENCZEK, IRENA, CMIELOWSKA, JOLANTA, BIALY, JAN, KACZMARCZYK, WLODZIMIERZ, KOPYTOWSKA, NIKUCA, MAZUR, KAZIMIERZ, WRZYSZCZ, JOSEF
• Format: Patent
• Language: Norwegian
• Published: 06.06.1985
• Edition: 4
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; APPARATUS THEREFOR; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

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.