Patent ID: 7919536

Claim:
A process for carrying out Fischer-Tropsh Synthesis, which comprises providing a slurry bed loop reactor comprising a riser and at least one downcomer ( 3 ), wherein two ends of the riser are connected to two ends of the downcomer ( 3 ) respectively via lines ( 16 ) and ( 7 ); wherein said riser comprises a reaction section ( 1 ) and a settling section ( 2 ) with an increased tube diameter disposed on the reaction section ( 1 ); a gas outlet ( 13 ) being present at the top of the settling section ( 2 ); each of the downcomers ( 3 ) being divided into a filtrate section ( 5 ) and a slurry section ( 6 ) by filter medium ( 4 ), wherein the filtrate section ( 5 ) is connected to a liquid outlet ( 10 ), and two ends of the slurry section ( 6 ) are respectively connected to two ends of the riser; and feeding the raw material into the reactor via feed inlet ( 14 ), wherein the raw material is mixed with the slurry in the reaction section ( 1 ) of the riser; the mixed slurry reacts in the reaction section ( 1 ) and flows upwardly to the settling section ( 2 ) via the upper pipe end of the reaction section ( 1 ), and gas liquid separation is conducted in the settling section ( 2 ), wherein the gas is discharged from the discharge outlet ( 13 ) at the top of the settling section ( 2 ); coarse particles turn back to the reaction section ( 1 ) due to gravity settling; and the slurry containing fine particles enters the downcomer ( 3 ) from the settling section ( 2 ) via line ( 16 ); the main body of the slurry flows downwardly and axially in the slurry section ( 6 ), wherein a part of the liquid is driven by differential pressure between both sides of filter medium ( 4 ) to go through the filter medium ( 4 ) and into the filtrate section ( 5 ), and is finally drawn out as the product; and solid particles continue to flow downwardly with the main body of the slurry and go back to the reaction section ( 1 ) of the riser via line ( 7 ) for further reaction.