Patent ID: 6844370

Claim:
A high temperature Fischer-Tropsch process conducted in a fluidized bed reactor for the synthesis of hydrocarbon wherein hydrogen is reacted with carbon monoxide in the presence of a catalyst, wherein the catalyst is prepared by a process comprising the steps of: precipitating an iron product in the form of iron and/or an iron composition from an iron containing solution; adding at least one catalyst promoter prior, during or subsequent to the precipitation process; subjecting the precipitated iron product to heat treatment to provide the catalyst with a decreased surface area; and subjecting the iron product to reducing conditions to reduce the iron product to metallic iron, whereby a reduced catalyst is obtained, the reduced catalyst having a surface area of below 60 m 2 per gram of catalyst, wherein the reduced catalyst consists essentially of iron and a promoter selected from the group consisting of a source of alkali metal, a source of alkaline earth metal, and mixtures thereof, and wherein the reduced catalyst comprises from 0.000213 moles alkali metal and/or alkaline earth metal per 100 g Fe to 0.0426 moles alkali metal and/or alkaline earth metal per 100 g Fe.