Patent ID: 7098251
Filing Date: 2006-08-29
Classification: B01D,B01J,C10G

Abstract:
1. A process for the production in continuous of hydrocarbons from synthesis gas in slurry reactors which comprises: a. continuously feeding to the bottom of-a reactor for Fischer-Tropsch reactions, containing in suspension in the reaction product, a catalyst based on supported cobalt, a synthesis gas consisting essentially of hydrogen and carbon monoxide; b. continuously discharging from the head of the reactor, a stream consisting essentially of light synthesis products in vapour phase and non-reacted reaction gas; c. continuously discharging from the reactor, the heavy reaction product consisting essentially of a liquid hydrocarbon phase; d. subjecting the heavy reaction product, before or after being discharged, to a separation/filtration treatment using a device which comprises a series of filtration cartridges, each consisting of a first filtering element made of a porous or meshed material with an average size of the pores or meshes ranging from 0.5 to 15 μm, which is positioned above a second filtering element, suitable for micro/ultra-filtration, made of a porous material with an average pore size ranging from 0.002 to 0.1 μm, said second filtering element being inserted in a metallic structure coaxially connected to the first filtering element; e. sending the heavy reaction product coming from step (d), in liquid phase, having a content of fine or sub-micronic particles lower than 5 ppm to a subsequent treatment unit, or discharging it and cooling it to room temperature; f. recycling the solids coming from the separation/filtration step to the reaction reactor.