Synthetic crystalline metallosilicate compositions, the preparation thereof and their use in the conversion of synthesis gas to low molecular weight hydrocarbons

摘要

Crystalline palladium or platinum ferrometallosilicate compositions are prepared from a silica-containing mixture by digesting a reaction mixture comprising (a) a tetraalkylammonium compound, (b) a sodium hydroxide, (c) a titanium compound, an aluminum compound, or a manganese compound, (d) an oxide of silicon, (e) an iron ion source, (f) optionally, a chelating agent and (g) water to provide a crystalline ferrometallosilicate which is then palladium or platinum ion-exchanged. Conversion of synthesis gas to low molecular hydrocarbons with high C2-C3 alkanes selectivity employing these new ferrometallosilicates as catalysts is also disclosed.