Method for temporarily interrupting a Fischer-Tropsch...

Details Method for temporarily interrupting a Fischer-Tropsch... Method for temporarily interrupting a Fischer-Tropsch...

2006-11-16

2009-10-20

Parsa, Jafar (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S715000, C518S728000

Reexamination Certificate

active

07605187

ABSTRACT:
A process for temporarily interrupting a Fischer-Tropsch type reaction carried out on a feed comprising at least carbon monoxide and hydrogen is carried out in a three-phase reaction zone comprising a liquid phase, a gas phase and solid catalyst particles maintained in suspension, said process comprising a step a) for interrupting the reaction and a step b) for restarting said reaction, during which the solid catalyst particles are maintained in suspension in the reaction zone;a) during the step for interrupting the reaction, supply of the feed is stopped, and a blanket of an inhibiting gas comprising less than 1% by volume of hydrogen and at least 5% by volume of at least one inhibiting compound selected from the group formed by carbon monoxide and water is established; andb) during the reaction restart step, in the reaction zone, a blanket of an activating gas with a hydrogen content of at least 20% by volume is established and supply of the feed is restarted.

REFERENCES:
patent: 5728918 (1998-03-01), Nay et al.
patent: 6512017 (2003-01-01), Steynberg et al.
patent: 2004/0147623 (2004-07-01), Front Freide
patent: 2 223 237 (1990-04-01), None
patent: WO 02/096834 (2002-12-01), None

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