Fischer-Tropsch process

Details Fischer-Tropsch process Fischer-Tropsch process

2006-02-28

2006-02-28

Parsa, J. (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S705000, C518S715000

Reexamination Certificate

active

07005456

ABSTRACT:
A method of starting up a Fischer-Tropsch reaction in a system comprising at least one high shear mixing zone and a reactor vessel which method comprises a) passing a suspension of a particulate Fischer-Tropsch catalyst in a liquid medium through the high shear mixing zone(s) into the reactor vessel and recycling at least a portion of the suspension to the high shear mixing zone(s) in the substantial absence of a gaseous reactant feed stream comprising synthesis gas; b) increasing the temperature and/or pressure within the reactor vessel until a threshold temperature and/or pressure is reached and subsequently introducing a gaseous reactant stream comprising synthesis gas into the high shear mixing zone(s) where the gaseous reactant stream is mixed with the suspension; c) discharging a mixture comprising synthesis gas and the suspension from the high shear mixing zone(s) into the reactor vessel; d) converting the synthesis gas to liquid hydrocarbons in the reactor vessel to form a product suspension comprising the particulate Fischer-Tropsch catalyst suspended in the liquid medium and liquid hydrocarbons; and e) recycling at least a portion of the product suspension to the high shear mixing zone(s).

REFERENCES:
patent: 6512017 (2003-01-01), Steynberg et al.
patent: 728543 (1955-04-01), None
patent: WO 01/38269 (2001-05-01), None

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