Metal-contg. ZSM-5 type zeolites - useful as hydrocarbon conversion catalysts

摘要

New zeolites are characterised by their molar compsn. and by their X-ray diffraction pattern (which is characteristic of ZSM-5 zeolites). The molar compsn. in the anhydrous state is (R2O,M2'/nO)w:(Al2O3)x:(SiO2)y:(M"2/nO)z (where 0.5 w/y 3;y/x 20;0 z/x 100; R is a N-contg. cation, pref. tetra (2-5C alkyl)ammonium; M' is an alkali metal; M" is In, B, Ru, Pt, Cr, a rare earth metal, V, Pd, Mo, Hg, Te and/or Ag; n is the valence of M' or M"). Also claimed are zeolites with the above compsn. in which R and/or M' are replaced by alkylammonium, metal, NH4 and/or H cations, as well as products obtd. by heat treating these zeolites at 260 degrees C. The zeolites are useful as hydrocarbon conversion catalysts, e.g. for cracking, hydrocracking, isomerisation, olefin polymerisation, reforming, alkylation, toluene disproportion, and conversion of methanol to hydrocarbons (esp. p-xylene). They have high selectivity and stability.