Catalysts suitable for the Conversion of Hydrocarbons, Their Preparation and Use

摘要

1,151,653. Hydrocarbon conversion catalysts. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. 23 March, 1967 [25 March, 1966], No. 13785/67. Heading B1E. (Also in Divisions C and C5] A catalyst suitable for the conversion of hydrocarbons can be prepared by replacing the metal cations of a zeolite by hydrogen ions by treating the zeolite with an acid having a dissociation constant equal to or greater than 20 x 10-5 and at a temperature in the range 50‹ to 150‹C and with an ammonium compound. The zeolite may be first treated with the acid and thereafter with an ammonium compound, and at least one of the treatments may be applied several times. The zeolite is dried and/or calcined after at least one of the treatments. The calcining is preferably effected between 400‹C to 700‹C. The acids include HCl, HNO 3 , H 2 SO 4 , and H 3 PO 4 at a concentration preferably from 0.1 to 1 ON. The acid treatment is more preferably at the boiling point of the acid solution. The preferred ammonium compounds are NH 4 OH, NH 4 Cl, NH 4 NO 3 , NH 4 sulphates and NH 4 phosphates. The ammonium compound is preferably applied as a solution of 0.1 to 4 ON and the treatment is preferably effected at 0‹ to 100‹C. This treatment is continued until the zeolite no longer gives off alkali metal. Ions which may be supported are Mo, Ni, Pt or Pd or any combination.