Patent ID: 7262225

Claim:
A process for producing a clean wax product, which includes the following steps in the following sequence: introducing, in a catalyst support preparation step, a modifying component Mc, which is selected from (i) Si, Co, Ce, Cu, Zn, Ba, Ni, Na, K, Ca, Sn, Cr, Fe, Li, TI, Sr, Ga, Sb, V, Hf, Th, Ge, U, Nb, Ta, W, La and mixtures thereof; and/or from (ii) Ti in combination with at least one of Si, Co, Ce, Cu, Zn, Ba, Ni, Na, K, Ca, Sn, Cr, Fe, Li, TI, Sr, Ga, Sb, V, Hf, Th, Ge, U, Nb, Ta, W, and La, into a catalyst support precursor, followed by shaping and calcination of the catalyst support precursor, to obtain a catalyst support; impregnating the catalyst support with an aqueous solution of a cobalt salt, to form an impregnated support; partially drying the impregnated support; calcining the partially dried impregnated support to obtain a catalyst precursor; reducing the catalyst precursor to form a cobalt slurry phase Fischer-Tropsch synthesis catalyst; contacting, at an elevated temperature between 180° C. and 250° C., at an elevated pressure between 10 bar and 40 bar, and in a slurry phase Fischer-Tropsch synthesis reaction, a synthesis gas comprising hydrogen and carbon monoxide with the cobalt slurry phase Fischer-Tropsch synthesis catalyst, and recovering a clean wax product that contains less than 50 mass ppm submicron particulates of cobalt.