Catalysts for the conversion of syn gas

Abstract

A catalyst system for the conversion of synthesis gas in a single stage to liquid hydrocarbons comprises (a) a copper-containing alcohol synthesis catalyst, (b) an iron-containing modifier for the alcohol synthesis catalyst to promote the formation of hydrocarbons, and (c) a metallosilicate wax cracking catalyst. The alcohol synthesis catalyst (a) can contain thorium, zinc, uranium or zirconium in addition to the copper. The iron-containing modifier (b) can contain an iron-containing zeolite such as ferrierite or an inorganic support containing ferrous or ferric ions. The metallosilicate can be a zeolite or gallosilicate. The zeolite can have a pore diameter of at least 5 Angstroms and can have the faujasite structure. A Group VIIIA metal e.g., Pd may be incorporated on the zeolite to suppress coke formation. A hydrocarbon product from the conversion can be obtained containing at least 70 percent by weight of hydrocarbons in the range C.sub.3 to a boiling point of 340.degree. C., and less than 10 percent by weight of methane.

Dependencies are inferred from the claim text.