An 
oxygenate conversion catalyst useful in the conversion of oxygenates such as 
methanol to olefinic products may be improved by the use of a catalyst combination based on a 
molecular sieve in combination with a co-catalyst comprising a 
mixed metal oxide composition which has oxidation / reduction functionality under the conditions of the conversion. This 
metal oxide co-catalyst component will comprise a 
mixed oxide of one or more, preferably at least two, transition metals, usually of Series 4, 5 or 6 of the 
Periodic Table, with the metals of Series 4 being preferred, as an essential component of the 
mixed oxide composition. The preferred transition metals are those of Groups 5, especially 
titanium and 
vanadium, Group 6, especially 
chromium or 
molybdenum, Group 7, especially 
manganese and Group 8, especially 
cobalt or 
nickel. Other 
metal oxides may also be present. The preferred 
molecular sieve components in these catalysts are the 
high silica zeolites and the SAPOs, especially the small pore SAPOs (8-membered rings), such as SAPO-34. These catalyst combinations exhibit reduced 
coke selectivity have the potential of achieving extended catalyst life. In addition, these catalysts have the capability of selectively converting the 
hydrogen produced during the conversion to liquid products, mainly water, reducing the demand on reactor volume and product handling.